.directions-heading__intro{max-width:760px;color:var(--topics-muted);margin-bottom:0;font-size:16px;line-height:1.85}.directions-heading__actions{flex-wrap:wrap;gap:12px;margin-top:20px;display:flex}.directions-heading__reference-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.directions-heading__actions .topics-button{margin-top:0}.directions-heading__read{--world-accent:#80d9eb}.topics-page.reading-page{padding:calc(var(--ark-header-height) + 32px) 32px 80px;background:radial-gradient(at 90% 0,#30244960,#0000 45%),#070a18}.reading-page__shell{width:min(100%,1280px);margin:0 auto}.reading-page__heading h1{color:#f7f5ef;letter-spacing:-.035em;overflow-wrap:anywhere;margin:12px 0 42px;font-family:Georgia,serif;font-size:clamp(2.6rem,5vw,4.5rem);font-weight:400;line-height:1.12}.reading-section{scroll-margin-top:calc(var(--ark-header-height) + 24px)}.reading-section+.reading-section{margin-top:48px}.reading-section>h2{color:#e8edff;margin:0 0 18px;font-size:clamp(1.25rem,2.5vw,1.65rem);font-weight:500;line-height:1.4}.reading-grid{gap:18px;display:grid}.reading-grid--ark,.reading-grid--external{grid-template-columns:repeat(3,minmax(0,1fr))}.reading-card{--reading-accent:#c4b5fd;border:1px solid color-mix(in srgb, var(--reading-accent) 25%, transparent);background:linear-gradient(135deg, color-mix(in srgb, var(--reading-accent) 8%, #0e1428), #0e1428);border-radius:14px;flex-direction:column;min-width:0;padding:26px;display:flex}.reading-card__location{color:var(--reading-accent);font-size:.8125rem;line-height:1.5}.reading-card h3{color:#f7f5ef;overflow-wrap:anywhere;margin:10px 0 22px;font-size:clamp(1.25rem,2vw,1.65rem);font-weight:500;line-height:1.3}.reading-card__count{color:#c3cde3;align-items:baseline;gap:10px;margin:-6px 0 24px;font-size:.9375rem;line-height:1.5;display:flex}.reading-card__count dd{color:#f7f5ef;order:-1;margin:0;font-size:1.25rem}.reading-card__note{color:#c3cde3;margin:-8px 0 24px;font-size:.9375rem;line-height:1.6}.reading-card__actions{flex-wrap:wrap;gap:8px 24px;margin-top:auto;display:flex}.reading-page .reading-card__actions a{min-height:44px;color:var(--reading-accent);text-underline-offset:4px;overflow-wrap:anywhere;justify-content:space-between;align-items:center;gap:16px;font-size:.9375rem;line-height:1.5;text-decoration:underline;display:inline-flex}.reading-page .reading-card__actions a:hover{color:#fff}.reading-page .reading-card__actions a:focus-visible{outline:2px solid var(--reading-accent);outline-offset:5px;border-radius:3px}.reading-card__actions a span{flex:none}@media (width<=940px){.reading-grid--ark,.reading-grid--external{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=620px){.topics-page.reading-page{padding:calc(var(--ark-header-height) + 20px) 20px 56px}.reading-grid--ark,.reading-grid--external{grid-template-columns:minmax(0,1fr)}.reading-card{padding:22px}.reading-page__heading h1{margin-bottom:32px}.reading-section+.reading-section{margin-top:36px}}.topics-page,.topic-intro{--topics-bg:#070a18;--topics-panel:#0e1428;--topics-text:#f7f5ef;--topics-muted:#ebefffa3;--topics-line:#d6deff21;min-height:100svh;color:var(--topics-text);background:var(--topics-bg);position:relative;overflow:hidden}.topics-page a,.topic-intro a{color:inherit}.route-language-switcher{color:#ecefff4d;letter-spacing:.16em;align-items:center;gap:8px;font-size:10px;font-weight:700;display:flex}.route-language-switcher a{border:1px solid #0000;border-radius:50%;place-items:center;min-width:34px;min-height:34px;text-decoration:none;display:grid;color:#ecefff7a!important}.route-language-switcher a:hover,.route-language-switcher a.active{background:#ffffff0b;border-color:#dad1ff40;color:#fff!important}.topics-page a:focus-visible,.topic-intro a:focus-visible{outline-offset:5px;border-radius:4px;outline:2px solid #d9ceff}.topics-cosmos{pointer-events:none;position:absolute;inset:0;overflow:hidden}.topics-star-field{opacity:.25;background-image:radial-gradient(circle,#ffffffdb 0 1px,#0000 1.3px);background-size:98px 98px;animation:42s linear infinite topics-drift;position:absolute;inset:-12%}.topics-star-field--far{opacity:.14;background-position:37px 61px;background-size:151px 151px;animation-duration:68s;animation-direction:reverse}.topics-nebula{aspect-ratio:1;filter:blur(80px);opacity:.24;border-radius:50%;width:50vw;animation:18s ease-in-out infinite topics-breathe;position:absolute}.topics-nebula--one{background:#4a5ae2;top:-28vw;left:-14vw}.topics-nebula--two{background:#7952c8;animation-delay:-9s;bottom:-32vw;right:-22vw}.topics-drifter{background:#e5ddff;border-radius:50%;width:4px;height:4px;animation:13s ease-in-out infinite topics-float;position:absolute;box-shadow:0 0 18px 5px #a792ff5c}.topics-drifter--one{top:31%;left:18%}.topics-drifter--two{animation-delay:-5s;top:20%;right:19%}.topics-drifter--three{animation-delay:-9s;bottom:18%;right:34%}@keyframes topics-drift{to{transform:translate(98px,98px)}}@keyframes topics-breathe{50%{opacity:.32;transform:scale(1.08)}}@keyframes topics-float{50%{opacity:.45;transform:translate(12px,-18px)}}.topics-kicker{color:#b8a8ff;letter-spacing:.24em;text-transform:uppercase;margin:0;font-size:11px;font-weight:700;line-height:1.5}.topics-hero{isolation:isolate;background:radial-gradient(circle at 50% 46%,#8668ff2b,#0000 29%),linear-gradient(#070a1840,#070a18 96%);place-items:center;min-height:min(820px,84svh);padding:130px 7vw 110px;display:grid;position:relative}.topics-hero:after{content:"";z-index:-1;background:linear-gradient(90deg,#0000,#c1b5ff4d,#0000);width:min(78vw,920px);height:1px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.topics-hero__content{z-index:1;text-align:center;width:min(960px,100%);position:relative}.topics-hero__language{z-index:3;position:absolute;top:34px;right:4vw}.topics-hero h1{letter-spacing:-.065em;text-wrap:balance;text-shadow:0 0 58px #a48cff52;max-width:960px;margin:28px auto 30px;font-family:Georgia,Times New Roman,serif;font-size:clamp(4rem,8vw,8.2rem);font-weight:400;line-height:.93}.topics-hero__intro{color:#eef0ffb3;text-wrap:pretty;max-width:720px;margin:0 auto;font-size:clamp(1rem,1.5vw,1.18rem);line-height:1.8}.topics-hero__guide{color:#eef0ff6b;letter-spacing:.22em;text-transform:uppercase;align-items:center;gap:12px;margin-top:70px;font-size:9px;display:inline-flex}.topics-hero__guide i{background:currentColor;width:34px;height:1px}.worlds-section{z-index:2;padding:90px 6vw 120px;position:relative}.topics-section-heading{grid-template-columns:1fr minmax(240px,400px);align-items:end;gap:50px;width:min(1400px,100%);margin:0 auto 54px;display:grid}.topics-section-heading h2,.connected-section h2{letter-spacing:-.055em;margin:14px 0 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.8rem,5vw,5.8rem);font-weight:400;line-height:.98}.topics-section-heading>p{color:var(--topics-muted);margin:0;font-size:14px;line-height:1.75}.world-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;width:min(1400px,100%);margin:0 auto;display:grid}.world-card{background:linear-gradient(155deg, color-mix(in srgb, var(--world-deep) 72%, #0a0f22), #090d1d 70%);border:1px solid #dbe1ff21;border-radius:3px;min-height:500px;transition:transform .35s,border-color .35s,box-shadow .35s;position:relative;overflow:hidden;box-shadow:0 20px 65px #00000024}.world-card:after{content:"";pointer-events:none;background:linear-gradient(135deg, color-mix(in srgb, var(--world-accent) 8%, transparent), transparent 48%);opacity:.35;transition:opacity .35s;position:absolute;inset:0}.world-card:hover,.world-card:focus-within{z-index:2;border-color:color-mix(in srgb, var(--world-accent) 48%, transparent);box-shadow:0 28px 75px #00000042, 0 0 35px color-mix(in srgb, var(--world-accent) 8%, transparent);transform:translateY(-7px)}.world-card:hover:after,.world-card:focus-within:after{opacity:.78}.world-card__link{z-index:1;flex-direction:column;min-height:500px;text-decoration:none;display:flex;position:relative}.world-card__link:focus-visible{outline-offset:-5px;border-radius:0}.world-card__body{flex-direction:column;flex:1;padding:10px 28px 28px;display:flex}.world-card__meta{color:color-mix(in srgb, var(--world-accent) 75%, white);letter-spacing:.16em;justify-content:space-between;font-size:10px;display:flex}.world-card__meta span:last-child{font-size:17px;line-height:.6}.world-card h2{letter-spacing:-.045em;margin:28px 0 11px;font-family:Georgia,Times New Roman,serif;font-size:clamp(2rem,2.6vw,3.1rem);font-weight:400;line-height:1}.world-card p{color:#ebefff99;max-width:330px;margin:0;font-size:14px;line-height:1.65}.world-card__explore{color:#f5f6ffc2;letter-spacing:.12em;text-transform:uppercase;border-top:1px solid #e0e5ff1f;justify-content:space-between;margin-top:auto;padding-top:24px;font-size:10px;font-weight:700;display:flex}.world-card__explore span{color:var(--world-accent);font-size:15px;transition:transform .25s}.world-card:hover .world-card__explore span{transform:translate(3px,-3px)}.world-visual{isolation:isolate;background:radial-gradient(circle at 50% 48%, color-mix(in srgb, var(--world-accent) 23%, transparent), transparent 26%), linear-gradient(180deg, color-mix(in srgb, var(--world-deep) 72%, transparent), transparent 95%);flex:none;height:245px;position:relative;overflow:hidden}.world-haze{z-index:-1;background:var(--world-secondary);filter:blur(48px);opacity:.2;border-radius:50%;position:absolute;inset:22% 25%}.world-orbit{border:1px solid color-mix(in srgb, var(--world-accent) 30%, transparent);border-radius:50%;transition:transform .8s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-13deg)}.world-orbit--outer{width:215px;height:118px}.world-orbit--inner{border-color:color-mix(in srgb, var(--world-secondary) 28%, transparent);width:142px;height:142px;transform:translate(-50%,-50%)rotate(48deg)}.world-card:hover .world-orbit--outer{transform:translate(-50%,-50%)rotate(-6deg)}.world-card:hover .world-orbit--inner{transform:translate(-50%,-50%)rotate(56deg)}.world-path{opacity:.32;position:absolute}.world-path--one{border-top:1px solid var(--world-accent);border-radius:50%;height:24px;top:55%;left:8%;right:8%;transform:rotate(-8deg)}.world-path--two{border-bottom:1px solid var(--world-secondary);border-radius:50%;height:35px;top:42%;left:18%;right:18%;transform:rotate(10deg)}.world-symbol{border:1px solid color-mix(in srgb, var(--world-accent) 50%, transparent);width:64px;height:64px;color:color-mix(in srgb, var(--world-accent) 85%, white);background:color-mix(in srgb, var(--world-deep) 70%, transparent);box-shadow:0 0 38px color-mix(in srgb, var(--world-accent) 17%, transparent), inset 0 0 18px #ffffff0d;place-items:center;font-family:Georgia,serif;font-size:24px;line-height:1;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(45deg)}.world-symbol>span{display:block;transform:rotate(-45deg)}.world-speck{background:var(--world-accent);width:4px;height:4px;box-shadow:0 0 13px 3px color-mix(in srgb, var(--world-accent) 45%, transparent);border-radius:50%;position:absolute}.world-speck--one{top:35%;left:21%}.world-speck--two{width:2px;height:2px;top:29%;right:18%}.world-speck--three{width:3px;height:3px;bottom:25%;right:28%}.world-visual--universe .world-orbit--outer{width:235px;height:76px;transform:translate(-50%,-50%)rotate(17deg)}.world-visual--universe .world-haze{background:linear-gradient(90deg, var(--world-secondary), var(--world-accent));transform:rotate(-24deg)}.world-visual--intelligence .world-orbit{border-radius:18% 82% 36% 64%}.world-visual--intelligence .world-path--one{border-top-style:dashed;border-radius:0}.world-visual--physical-mastery .world-orbit--outer{border-width:0 1px 1px 0;width:170px;height:170px;transform:translate(-50%,-50%)rotate(35deg)}.world-visual--physical-mastery .world-path--two{border-bottom-width:2px}.world-visual--addictions-and-liberation{background:linear-gradient(90deg, #03050cd1, transparent 62%), radial-gradient(circle at 70% 50%, color-mix(in srgb, var(--world-accent) 28%, transparent), transparent 34%)}.world-visual--addictions-and-liberation .world-symbol,.world-visual--addictions-and-liberation .world-orbit{left:68%}.world-visual--crystal-knowledge .world-symbol{clip-path:polygon(50% 0,91% 27%,82% 78%,50% 100%,18% 78%,9% 27%);width:70px;height:70px}.world-visual--crystal-knowledge .world-path{border-radius:0;transform:rotate(0)}.connected-section{border-top:1px solid var(--topics-line);border-bottom:1px solid var(--topics-line);background:radial-gradient(circle at 70%,#6557c421,#0000 36%),#090d1c;padding:120px 7vw 100px;position:relative}.connected-section__copy{text-align:center;width:min(800px,100%);margin:0 auto}.connected-section__copy>p:last-child{max-width:720px;color:var(--topics-muted);margin:31px auto 0;font-size:15px;line-height:1.9}.constellation-map{width:min(930px,100%);margin:44px auto 0}.constellation-map svg{width:100%;height:auto;overflow:visible}.constellation-map line{stroke-width:1px;stroke-dasharray:3 8}.constellation-map text{fill:#ebefff80;letter-spacing:.06em;font-family:Arial,sans-serif;font-size:12px}.topics-development{color:#11172a;background:#f2efe7;grid-template-columns:auto minmax(240px,1fr) auto;align-items:center;gap:26px;padding:70px 7vw;display:grid;position:relative}.topics-development p{max-width:710px;margin:0;font-family:Georgia,serif;font-size:clamp(1.1rem,2vw,1.45rem);line-height:1.55}.topics-development__mark{border:1px solid #765ed4;width:44px;height:44px;position:relative;transform:rotate(45deg)}.topics-development__mark i{border:1px solid #765ed4;position:absolute;inset:10px}.topics-development__mark i:last-child{background:#765ed4;inset:17px}.topics-button{letter-spacing:.08em;white-space:nowrap;border:1px solid #11172a4d;border-radius:999px;justify-content:center;align-items:center;gap:24px;min-height:48px;padding:14px 19px 14px 22px;font-size:11px;font-weight:700;text-decoration:none;transition:transform .2s,background .2s,border-color .2s;display:inline-flex;color:#11172a!important}.topics-button:hover{background:#11172a0a;border-color:#11172a;transform:translateY(-2px)}.topics-button--accent{border-color:color-mix(in srgb, var(--world-accent) 52%, transparent);background:color-mix(in srgb, var(--world-accent) 16%, transparent);width:fit-content;margin-top:36px;color:#fff!important}.topics-button--accent:hover{border-color:var(--world-accent);background:color-mix(in srgb, var(--world-accent) 23%, transparent)}.topic-intro{isolation:isolate;background:radial-gradient(circle at 78% 47%, color-mix(in srgb, var(--world-accent) 16%, transparent), transparent 28%), radial-gradient(circle at 10% 0%, color-mix(in srgb, var(--world-secondary) 13%, transparent), transparent 34%), linear-gradient(145deg, var(--topics-bg), color-mix(in srgb, var(--world-deep) 42%, #070a18));min-height:100svh}.topic-intro__shell{z-index:1;flex-direction:column;width:min(1320px,100%);min-height:100svh;margin:0 auto;padding:130px 6vw 80px;display:flex;position:relative}.topic-intro__topbar{justify-content:space-between;align-items:center;gap:24px;display:flex}.topics-back-link{letter-spacing:.12em;text-transform:uppercase;align-items:center;gap:12px;width:fit-content;min-height:44px;font-size:10px;font-weight:700;text-decoration:none;display:inline-flex;color:#f0f2ff9e!important}.topics-back-link:hover{color:#fff!important}.topic-intro__home{letter-spacing:.12em;text-transform:uppercase;width:fit-content;font-size:10px;font-weight:700;text-decoration:none;color:#f0f2ff66!important}.topic-intro__home:hover{color:#fff!important}.topic-intro__content{flex:1;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);align-items:center;gap:5vw;padding:70px 0;display:grid}.topic-intro__copy{max-width:700px}.topic-intro h1{letter-spacing:-.07em;text-wrap:balance;text-shadow:0 0 55px color-mix(in srgb, var(--world-accent) 22%, transparent);margin:24px 0 22px;font-family:Georgia,Times New Roman,serif;font-size:clamp(4.3rem,8vw,8.8rem);font-weight:400;line-height:.86}.topic-intro__description{color:color-mix(in srgb, var(--world-accent) 68%, white);margin:0;font-size:clamp(1.05rem,1.7vw,1.35rem);line-height:1.6}.topic-intro__rule{background:linear-gradient(90deg, var(--world-accent), transparent);width:70px;height:1px;margin:34px 0}.topic-intro__message{max-width:610px;color:var(--topics-muted);margin:0;font-size:15px;line-height:1.85}.world-visual--large{aspect-ratio:1;border:1px solid color-mix(in srgb, var(--world-accent) 13%, transparent);background:radial-gradient(circle, color-mix(in srgb, var(--world-accent) 16%, transparent), transparent 53%);border-radius:50%;justify-self:end;width:min(520px,42vw);height:auto;overflow:visible}.world-visual--large:after{content:"";border:1px solid color-mix(in srgb, var(--world-secondary) 13%, transparent);border-radius:50%;position:absolute;inset:9%}.world-visual--large .world-haze{filter:blur(75px);opacity:.32;inset:28%}.world-visual--large .world-orbit--outer{width:74%;height:39%}.world-visual--large .world-orbit--inner{width:52%;height:52%}.world-visual--large .world-symbol{width:104px;height:104px;font-size:34px}.world-visual--large.world-visual--addictions-and-liberation .world-symbol,.world-visual--large.world-visual--addictions-and-liberation .world-orbit{left:61%}.physics-map{z-index:1;border-top:1px solid var(--topics-line);width:min(1320px,100%);margin:0 auto;padding:108px 6vw 132px;scroll-margin-top:96px;position:relative}.physics-map button,.physics-map input{font:inherit}.physics-map button{color:inherit}.physics-map button:focus-visible,.physics-map input:focus-visible{z-index:2;outline:2px solid color-mix(in srgb, var(--world-accent) 78%, white);outline-offset:3px;position:relative}.physics-map__heading{grid-template-columns:minmax(0,1.05fr) minmax(280px,.65fr);align-items:end;gap:clamp(34px,7vw,104px);margin-bottom:62px;display:grid}.physics-map__heading h2{letter-spacing:-.065em;text-wrap:balance;max-width:760px;margin:19px 0 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(3.5rem,6.8vw,7.1rem);font-weight:400;line-height:.9}.physics-map__heading>p{max-width:510px;color:var(--topics-muted);margin:0;padding-bottom:8px;font-size:15px;line-height:1.8}.physics-map__search{margin-bottom:26px}.physics-map__search>label{color:color-mix(in srgb, var(--world-accent) 70%, white);letter-spacing:.15em;text-transform:uppercase;margin-bottom:11px;font-size:9px;font-weight:700;display:block}.physics-map__search-control{border:1px solid color-mix(in srgb, var(--world-accent) 20%, var(--topics-line));-webkit-backdrop-filter:blur(13px);backdrop-filter:blur(13px);background:#080d1e9e;grid-template-columns:1fr auto;align-items:stretch;min-height:62px;transition:border-color .25s,background .25s;display:grid}.physics-map__search-control:focus-within{border-color:color-mix(in srgb, var(--world-accent) 54%, transparent);background:#0a1025d1}.physics-map__search-control input{color:#fff;background:0 0;border:0;outline:0;min-width:0;padding:18px 21px;font-size:14px}.physics-map__search-control input::placeholder{color:#ebefff59}.physics-map__search-control input::-webkit-search-cancel-button{display:none}.physics-map__search-control button{letter-spacing:.12em;text-transform:uppercase;cursor:pointer;background:#ffffff09;border:1px solid #ebefff29;min-width:84px;margin:9px;padding:0 17px;font-size:9px;font-weight:700;transition:border-color .2s,background .2s,color .2s}.physics-map__search-control button:hover:not(:disabled){border-color:color-mix(in srgb, var(--world-accent) 58%, transparent);background:color-mix(in srgb, var(--world-accent) 12%, transparent)}.physics-map__search-control button:disabled{color:#ebefff40;cursor:default}.physics-map__results{color:#ebefff6b;letter-spacing:.04em;min-height:17px;margin:11px 0 0;font-size:10px}.physics-map__parts{border-top:1px solid var(--topics-line);border-left:1px solid var(--topics-line);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.physics-part-button{border:0;border-right:1px solid var(--topics-line);border-bottom:1px solid var(--topics-line);text-align:left;cursor:pointer;background:#ffffff05;flex-direction:column;align-items:flex-start;min-height:156px;padding:23px 24px 21px;transition:background .28s,box-shadow .28s,transform .28s;display:flex}.physics-part-button:hover{background:color-mix(in srgb, var(--world-accent) 7%, transparent)}.physics-part-button[aria-selected=true]{background:linear-gradient(145deg, color-mix(in srgb, var(--world-accent) 13%, transparent), transparent 76%), #ffffff06;box-shadow:inset 0 2px color-mix(in srgb, var(--world-accent) 72%, white)}.physics-part-button__label{color:color-mix(in srgb, var(--world-accent) 62%, white);letter-spacing:.16em;text-transform:uppercase;margin-bottom:25px;font-size:9px;font-weight:700}.physics-part-button strong{max-width:285px;margin-top:auto;font-family:Georgia,Times New Roman,serif;font-size:19px;font-weight:400;line-height:1.22}.physics-part-button small{color:#ebefff61;letter-spacing:.06em;text-transform:uppercase;margin-top:9px;font-size:9px}.physics-map__part-panel{border:1px solid color-mix(in srgb, var(--world-accent) 16%, var(--topics-line));-webkit-backdrop-filter:blur(13px);backdrop-filter:blur(13px);background:#070b1b8f;margin-top:25px}.physics-map__part-heading{border-bottom:1px solid var(--topics-line);justify-content:space-between;align-items:end;gap:32px;min-height:136px;padding:31px 34px;display:flex}.physics-map__part-heading span{color:color-mix(in srgb, var(--world-accent) 66%, white);letter-spacing:.16em;text-transform:uppercase;margin-bottom:11px;font-size:9px;font-weight:700;display:block}.physics-map__part-heading h3{letter-spacing:-.04em;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(2rem,4vw,3.7rem);font-weight:400;line-height:1}.physics-map__part-heading>p{color:#ebefff6b;letter-spacing:.12em;text-transform:uppercase;flex:none;margin:0 0 4px;font-size:9px;font-weight:700}.physics-map__chapters{display:grid}.physics-chapter{border-bottom:1px solid var(--topics-line)}.physics-chapter:last-child{border-bottom:0}.physics-chapter h4{margin:0}.physics-chapter__button{text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:51px minmax(0,1fr) 32px;align-items:center;gap:21px;width:100%;min-height:104px;padding:24px 31px;transition:background .25s;display:grid}.physics-chapter__button:hover,.physics-chapter__button[aria-expanded=true]{background:color-mix(in srgb, var(--world-accent) 7%, transparent)}.physics-chapter__number{color:color-mix(in srgb, var(--world-accent) 58%, white);font-family:Georgia,Times New Roman,serif;font-size:16px}.physics-chapter__title{gap:8px;display:grid}.physics-chapter__title strong{font-family:Georgia,Times New Roman,serif;font-size:clamp(1.25rem,2vw,1.7rem);font-weight:400;line-height:1.2}.physics-chapter__title small{color:#ebefff5c;letter-spacing:.09em;text-transform:uppercase;font-size:9px;font-weight:700}.physics-chapter__toggle{width:30px;height:30px;color:color-mix(in srgb, var(--world-accent) 65%, white);border:1px solid #ebefff29;border-radius:50%;place-items:center;font-size:18px;font-weight:300;transition:border-color .2s,background .2s;display:grid}.physics-chapter__button[aria-expanded=true] .physics-chapter__toggle{border-color:color-mix(in srgb, var(--world-accent) 52%, transparent);background:color-mix(in srgb, var(--world-accent) 10%, transparent)}.physics-chapter__panel{padding:0 31px 33px 103px}.physics-lessons{border-top:1px solid var(--topics-line);border-left:1px solid var(--topics-line);grid-template-columns:repeat(2,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.physics-lessons li{border-right:1px solid var(--topics-line);border-bottom:1px solid var(--topics-line);background:#ffffff05;grid-template-columns:29px minmax(0,1fr) auto;align-items:center;gap:11px;min-height:86px;padding:17px 18px;display:grid}.physics-lesson__number{color:#ebefff4d;letter-spacing:.08em;font-size:9px}.physics-lesson__title{color:#f5f6ffbf;font-size:12px;line-height:1.5}.physics-lesson__status{color:#ebefff66;letter-spacing:.11em;text-transform:uppercase;border:1px solid #ebefff1f;border-radius:99px;padding:6px 8px;font-size:7px;font-weight:700}.physics-chapter__empty,.physics-map__empty{color:var(--topics-muted);margin:0;font-size:13px;line-height:1.7}.physics-chapter__empty{border:1px solid var(--topics-line);padding:26px 28px}.physics-map__empty{text-align:center;place-content:center;justify-items:center;gap:20px;min-height:210px;padding:48px 34px;display:grid}.physics-map__empty button{border:1px solid color-mix(in srgb, var(--world-accent) 43%, transparent);background:color-mix(in srgb, var(--world-accent) 9%, transparent);letter-spacing:.11em;text-transform:uppercase;cursor:pointer;min-height:42px;padding:0 17px;font-size:9px;font-weight:700}.knowledge-preview{color:#f7f5ef;background:#070a18;min-height:100svh;position:relative;overflow:hidden}.knowledge-preview a:focus-visible{outline-offset:5px;border-radius:3px;outline:2px solid #d9ceff}.foundation-lesson{overflow:clip}.foundation-lesson .knowledge-preview__article{width:min(1180px,100% - 48px);padding:118px 0 64px}.foundation-lesson .knowledge-preview__hero{max-width:900px;padding:20px 0 32px}.foundation-lesson .knowledge-preview__hero h1{letter-spacing:-.035em;margin:18px 0 22px;font-size:clamp(2.25rem,5vw,4.6rem);line-height:1.12}.foundation-lesson .knowledge-preview__lead{color:#c6d3ed}.foundation-lesson .knowledge-preview__body{display:block}.foundation-lesson .knowledge-preview__contents{top:96px}.foundation-lesson .knowledge-preview__contents>p{letter-spacing:.04em;color:#d0c2ff;font-size:.875rem}.foundation-lesson .knowledge-preview__contents a{color:#bccbe7;font-size:.875rem}.foundation-lesson .knowledge-preview__contents a span,.foundation-lesson .knowledge-preview__number{font-size:.875rem}.foundation-lesson .knowledge-preview__sections section{padding-bottom:46px}.foundation-lesson .knowledge-preview__sections h2{letter-spacing:-.02em;font-size:clamp(1.6rem,3vw,2.4rem);line-height:1.2}.foundation-lesson .knowledge-preview__sections h3{color:#e2d5ff;font-size:1.2rem;line-height:1.5}.foundation-lesson .knowledge-preview__sections section>p,.foundation-lesson .knowledge-preview__sections li,.foundation-lesson .knowledge-preview__sections article>p,.foundation-lesson .knowledge-preview__sections details p{color:#c4d0e9;font-size:1rem;line-height:1.8}.foundation-lesson .knowledge-preview__sections ul,.foundation-lesson .knowledge-preview__sections ol{padding-left:24px}.foundation-lesson .knowledge-preview__sections li{margin-bottom:12px}.foundation-lesson__preparation{color:#d0c2ff;font-size:.875rem;line-height:1.6}.foundation-lesson__preparation a{color:#d0c2ff;text-underline-offset:4px}.foundation-lesson-table-wrap{max-width:100%;margin:24px 0;overflow-x:auto}.foundation-lesson-table{border-collapse:collapse;text-align:left;width:100%}.foundation-lesson-table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.foundation-lesson-table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:10px}.foundation-lesson-table th{color:#d4def1;font-size:.875rem;line-height:1.6}.foundation-lesson__objectives{background:#a889ff0b;border-left:2px solid #9d86ed;border-radius:8px;margin-bottom:42px;padding:24px!important}.foundation-lesson__objectives h2{letter-spacing:0!important;font-family:inherit!important;font-size:1.125rem!important;font-weight:600!important;line-height:1.5!important}.foundation-example{background:#11192db3;border:1px solid #a799d13b;border-radius:12px;margin:24px 0;padding:24px}.foundation-example h3{margin:0 0 18px}.foundation-example__answer{border-top:1px solid #a799d13b;margin-bottom:0;padding-top:12px;color:#dccfff!important}.foundation-exercises>li{padding:16px 0}.foundation-exercises details{border:1px solid #a799d13b;border-radius:8px;padding:0 16px}.foundation-exercises summary{color:#d9ccff;cursor:pointer;min-height:44px;padding:12px 0;font-size:1rem;line-height:1.6}.foundation-lesson .knowledge-preview__sections .foundation-sources{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:24px 0 0;padding:0;list-style:none;display:grid}.foundation-lesson .knowledge-preview__sections .foundation-sources li{min-width:0;margin:0}.foundation-source{box-sizing:border-box;color:#ece5ff;overflow-wrap:anywhere;background:linear-gradient(135deg,#172442c2,#161b32b3);border:1px solid #a799d13b;border-radius:14px;gap:14px;height:100%;padding:20px;text-decoration:none;transition:border-color .2s,background .2s;display:flex}.foundation-source:hover{background:linear-gradient(135deg,#203454,#24233f);border-color:#b6a0ff99}.foundation-source__number{color:#c6b4fa;font-variant-numeric:tabular-nums;background:#b59aff0d;border:1px solid #a799d133;border-radius:8px;flex-shrink:0;place-items:center;width:30px;height:30px;font-size:.75rem;display:grid}.foundation-source__content{flex-direction:column;flex:1;align-items:flex-start;min-width:0;display:flex}.foundation-source__attribution{color:#a9c9e9;margin-bottom:6px;font-size:.875rem;line-height:1.5}.foundation-source__title{color:#ece5ff;margin-bottom:8px;font-size:1rem;font-weight:550;line-height:1.55;display:block}.foundation-source__kind{color:#c6b4fa;margin-bottom:16px;font-size:.8125rem;line-height:1.5}.foundation-source__note{color:#b9c8e1;margin:-4px 0 16px;font-size:.875rem;line-height:1.65;display:block}.foundation-source__entries{gap:8px;width:100%;margin:-4px 0 16px;font-size:.875rem;line-height:1.5;display:grid}.foundation-source__entries a{color:#cdbbff;text-underline-offset:3px;padding:6px 0;text-decoration:underline;display:block}.foundation-source--grouped:focus-within{border-color:#b6a0ff99}.foundation-source__footer{color:#a7b8d4;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px 14px;width:100%;margin-top:auto;font-size:.75rem;line-height:1.5;display:flex}.foundation-source__footer>span:first-child{flex:110px;min-width:0}.foundation-source__open{color:#cdbbff;flex-shrink:0;align-items:center;gap:8px;display:inline-flex}.foundation-source__open>span{font-size:1rem}.foundation-lesson .knowledge-preview__sections .foundation-sources--institutions{grid-template-columns:minmax(0,1fr);gap:12px}.foundation-sources--institutions .foundation-source{gap:12px;height:auto;padding:16px 18px}.foundation-sources--institutions .foundation-source__number{width:26px;height:26px;font-size:.6875rem}.foundation-sources--institutions .foundation-source__title{margin-bottom:4px}.foundation-sources--institutions .foundation-source__attribution{margin-bottom:3px;font-size:.8125rem}.foundation-sources--institutions .foundation-source__kind{margin-bottom:8px}.foundation-sources--institutions .foundation-source__footer{margin-top:4px}.foundation-sources--institutions .foundation-source__entries{gap:2px;margin:4px 0 8px}.foundation-sources--institutions .foundation-source__entries a{align-items:center;min-height:44px;display:flex}.foundation-institution{background:#131f35;border:1px solid #a799d13b;border-radius:14px;min-width:0;overflow:hidden}.foundation-institution>summary{box-sizing:border-box;cursor:pointer;color:#e3eeff;min-height:44px;padding:17px 18px}.foundation-institution>summary::marker{color:#b7d3f7}.foundation-institution__heading{vertical-align:middle;justify-content:space-between;align-items:baseline;gap:12px;width:calc(100% - 20px);display:inline-flex}.foundation-institution__heading strong{overflow-wrap:anywhere;font-size:.9375rem;font-weight:550;line-height:1.55}.foundation-institution__heading>span{color:#adc1de;flex-shrink:0;font-size:.75rem}.foundation-institution__sources{margin:0;padding:0;list-style:none}.foundation-institution__sources>li{border-top:1px solid #a799d126;min-width:0;margin:0}.foundation-institution__sources .foundation-source{background:0 0;border:0;border-radius:0}.foundation-institution__sources .foundation-source:hover{background:#22334a}.foundation-institution summary:focus-visible{outline-offset:-4px;border-radius:12px;outline:2px solid #d9ceff}@media (width<=540px){.foundation-institution__heading{flex-wrap:wrap;gap:4px 12px}.foundation-sources--institutions .foundation-source{padding:14px}}.foundation-lesson__next{background:0 0;border-top:1px solid #a799d13b;max-width:760px;margin:0 0 0 auto;padding:26px 0 0;display:block}.foundation-lesson__sequence{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.foundation-lesson__sequence-link{color:#ece5ff;overflow-wrap:anywhere;background:linear-gradient(135deg,#15263bb3,#181b30c2);border:1px solid #a799d14d;border-radius:14px;flex-direction:column;align-items:flex-start;min-width:0;padding:22px;font-size:1rem;line-height:1.6;text-decoration:none;transition:border-color .2s,background .2s;display:flex}.foundation-lesson__sequence-link--next{background:linear-gradient(135deg,#20203bc2,#202642b3)}.foundation-lesson__sequence-link--next:only-child{grid-column:2}.foundation-lesson__sequence-label{color:#b8c8e6;justify-content:space-between;align-items:center;gap:12px;width:100%;margin-bottom:12px;font-size:.8125rem;line-height:1.5;display:flex}.foundation-lesson__sequence-label i{color:#c5b0fc;font-size:1.125rem;font-style:normal}.foundation-lesson__sequence-link strong{color:#ece5ff;font-size:1.0625rem;font-weight:550;line-height:1.55}.foundation-lesson__sequence-status{color:#b4c1dd;margin-top:14px;font-size:.8125rem;line-height:1.5;display:block}.foundation-lesson__sequence-link:hover{background:#262640;border-color:#b6a0ff99}.foundation-lesson__map-link{color:#c6b6f4;align-items:center;gap:10px;width:fit-content;min-height:44px;margin-top:14px;font-size:.875rem;line-height:1.5;text-decoration:none;display:flex}.foundation-lesson__map-link:hover{color:#e4d9ff;text-underline-offset:4px;text-decoration:underline}@media (width<=680px){.foundation-lesson .knowledge-preview__sections .foundation-sources,.foundation-lesson__sequence{grid-template-columns:minmax(0,1fr)}.foundation-source,.foundation-lesson__sequence-link{padding:18px}.foundation-lesson__sequence-link--next:only-child{grid-column:auto}}@media (prefers-reduced-motion:reduce){.foundation-source,.foundation-lesson__sequence-link{transition:none}}.foundation-lesson a:focus-visible,.foundation-lesson button:focus-visible,.foundation-lesson summary:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.foundation-lesson .knowledge-preview__sections{width:100%;min-width:0}.foundation-lesson .knowledge-preview__sections h2,.foundation-lesson .knowledge-preview__sections section>p{max-width:none}.foundation-lesson .knowledge-preview__sections section>p{font-size:clamp(1rem,1.2vw,1.125rem)}.foundation-lesson .knowledge-preview__sections section[id],.foundation-lesson .knowledge-preview__sections h2[id]{scroll-margin-top:calc(var(--ark-header-height) + 24px)}.foundation-lesson .knowledge-preview__sections>section:not(.foundation-lesson__objectives){border-top:1px solid #a799d12e;padding-top:28px;padding-bottom:40px}.foundation-lesson .knowledge-preview__number{letter-spacing:.04em;font-variant-numeric:tabular-nums;margin-bottom:12px}.foundation-lesson__objectives{margin-bottom:28px}.foundation-lesson__objectives ul,.foundation-lesson__objectives li:last-child{margin-bottom:0}.foundation-lesson .foundation-example{background:linear-gradient(135deg,#15213ac2,#14182bb3);border-radius:14px;padding:clamp(18px,3vw,26px)}.foundation-example ol{margin-bottom:20px}.foundation-example li::marker{color:#c6b4fa;font-weight:600}.foundation-exercises>li::marker{color:#c6b4fa;font-weight:600}.foundation-lesson .foundation-example__answer{padding:16px 0 0;line-height:1.7}.foundation-lesson .foundation-exercises>li{background:#11192d80;border:1px solid #a799d12e;border-radius:14px;margin-bottom:16px;padding:18px}.foundation-exercises>li>p{margin:0 0 16px}.foundation-exercises details{background:#0b142380}.foundation-exercises details[open] summary{border-bottom:1px solid #a799d13b;margin-bottom:12px}.foundation-exercises details p:last-child{margin-bottom:18px}.foundation-lesson__explorer{min-width:0;container-type:inline-size}.foundation-lesson__explorer>:is(section,div){background:#102039a6;border:1px solid #8eb6ed4d;border-radius:14px;margin:28px 0 8px;padding:clamp(18px,3vw,26px)!important}.foundation-lesson .knowledge-preview__sections .foundation-lesson__explorer p{font-size:1rem;line-height:1.75}.foundation-lesson__explorer fieldset{min-width:0}.foundation-lesson__explorer :is(input,select,textarea){max-width:100%}.foundation-lesson__explorer select{min-height:44px}.foundation-lesson__explorer :is(button,input,select,textarea):focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.foundation-lesson__explorer figcaption{color:#bccbe7;font-size:.875rem;line-height:1.6}@container (width<=420px){.foundation-diagram__marker,.fraction-meaning-explorer__svg .foundation-diagram__tick,.powers-roots-explorer__svg .foundation-diagram__tick,.fraction-operations-explorer__svg .foundation-diagram__tick,.decimal-conversion-explorer__svg .foundation-diagram__tick,.ratios-rates-explorer__svg :is(.foundation-diagram__tick,.foundation-diagram__axis){font-size:32px}.fraction-equivalence-explorer__svg .foundation-diagram__tick{font-size:28px}.foundation-diagram__tick--optional{display:none}}.foundation-lesson .foundation-lesson__next{max-width:none;margin:16px 0 0}.foundation-lesson__contents{background:#11192d80;border:1px solid #a799d13b;border-radius:12px;margin:0 0 38px;padding:18px}.lesson-reading-path{background:#11192d80;border:1px solid #a799d13b;border-radius:12px;margin:0 0 24px;padding:18px}.lesson-reading-path h2{color:#e7dfff;margin:0 0 10px;font-size:1.1rem}.lesson-reading-path p{color:#c7d1e7;margin:0 0 14px;line-height:1.7}.lesson-reading-path ul{flex-wrap:wrap;gap:8px 18px;margin:12px 0;padding-left:20px;display:flex}.lesson-reading-path li{max-width:100%}.lesson-reading-path a{color:#c8b7ff;overflow-wrap:anywhere;line-height:1.6}.lesson-reading-path summary{color:#e7dfff;cursor:pointer;padding:8px 0}.foundation-lesson__contents>p{color:#d0c2ff;margin:0 0 12px;font-size:.875rem;font-weight:600;line-height:1.5}.foundation-lesson__contents-toggle{display:none}.foundation-lesson__contents ol{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.foundation-lesson__contents li{min-width:0;max-width:100%}.foundation-lesson__contents a{box-sizing:border-box;color:#d6e0f3;overflow-wrap:anywhere;background:#161b32;border:1px solid #a799d13b;border-radius:8px;align-items:baseline;gap:8px;max-width:100%;min-height:44px;padding:10px 12px;font-size:.875rem;line-height:1.5;text-decoration:none;display:flex}.foundation-lesson__contents a span{color:#bda5fa;font-variant-numeric:tabular-nums;flex-shrink:0}.foundation-lesson__contents a[aria-current=location]{color:#f3ebff;background:#a38be329;border-color:#bca2ff99;box-shadow:inset 2px 0 #c4aaff}.foundation-lesson__contents a:hover{color:#fff;background:#26213e;border-color:#b6a0ff}@media (width<=520px){.foundation-lesson__contents{padding:14px}.foundation-lesson__contents li{flex:100%}.foundation-lesson__contents[data-enhanced=true]>p{display:none}.foundation-lesson__contents[data-enhanced=true] .foundation-lesson__contents-toggle{color:#e7dfff;text-align:left;cursor:pointer;background:0 0;border:0;justify-content:space-between;align-items:center;gap:16px;width:100%;min-height:44px;padding:6px 2px;font-size:1rem;font-weight:600;line-height:1.5;display:flex}.foundation-lesson__contents-toggle span{color:#c6b4fa;font-size:1.25rem}.foundation-lesson__contents[data-enhanced=true][data-expanded=false]>ol{display:none}.foundation-lesson__contents[data-expanded=true]>ol{margin-top:12px}}.equality-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.equality-explorer>h3{margin-top:0}.equality-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.equality-explorer fieldset{border:0;margin:24px 0;padding:0}.equality-explorer legend{color:#d4def1;margin-bottom:12px;font-size:1rem}.equality-explorer__choices{flex-wrap:wrap;gap:8px;display:flex}.equality-explorer__choices button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.equality-explorer__choices button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.equality-explorer__sides{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.equality-explorer__sides>div{border:1px solid #8daee54a;border-radius:8px;min-width:0;padding:18px}.equality-explorer__sides dt{color:#b8c8e6;font-size:.875rem}.equality-explorer__sides dd{color:#dce5f5;margin:8px 0 0;font-size:1.125rem}.equality-explorer__sides dd strong{color:#e1d4ff;margin-top:8px;font-size:2rem;display:block}.equality-explorer__verdict{border-top:1px solid #8daee54a;margin-top:20px;padding-top:12px}.equality-explorer__verdict strong{color:#e1d4ff}.representation-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.representation-explorer>h3{margin-top:0}.representation-explorer h4{color:#e1d4ff;margin:0 0 12px;font-size:1rem;line-height:1.5}.representation-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.representation-explorer fieldset{border:0;margin:24px 0;padding:0}.representation-explorer legend{color:#d4def1;margin-bottom:12px;font-size:1rem}.representation-explorer__choices{flex-wrap:wrap;gap:8px;display:flex}.representation-explorer__choices button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.representation-explorer__choices button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.representation-explorer__words,.representation-explorer__symbols{background:#a889ff0b;border-left:2px solid #b6a0ff;border-radius:6px;margin:20px 0;padding:16px}.representation-explorer__words p,.representation-explorer__symbols p{margin:0}.representation-explorer__views{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:20px;display:grid}.representation-explorer figure{min-width:0;margin:0}.representation-explorer__picture{border:1px solid #8daee54a;border-radius:8px;padding:12px}.representation-explorer__groups{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;min-height:100px;display:flex}.representation-explorer__group{border:1px solid #aa99de77;border-radius:8px;grid-template-columns:repeat(2,14px);gap:8px;padding:12px;display:grid}.representation-explorer__stone{background:#91c6f5;border-radius:50%;width:14px;height:14px;display:block}.representation-explorer__loose{color:#d3c4f1;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-top:16px;font-size:.875rem;display:flex}.representation-explorer__loose>div{gap:8px;display:flex}.representation-explorer__loose .representation-explorer__stone{background:#d2b5ff}.representation-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.representation-explorer table{border-collapse:collapse;color:#d6e2f3;width:100%;font-size:1rem}.representation-explorer caption{color:#e1d4ff;text-align:left;margin-bottom:12px;font-weight:600}.representation-explorer th,.representation-explorer td{text-align:left;border-bottom:1px solid #8daee52e;padding:8px}.representation-explorer tr.is-selected{background:#a48ae62b}.representation-explorer__symbols .representation-explorer__rule{color:#e1d4ff;margin-bottom:12px;font-size:1.25rem}.representation-explorer__result{border-top:1px solid #8daee54a;padding-top:12px}.representation-explorer__result strong{color:#e1d4ff}.claim-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.claim-explorer>h3{margin-top:0}.claim-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.claim-explorer fieldset{border:0;margin:24px 0;padding:0}.claim-explorer legend{color:#d4def1;margin-bottom:12px;font-size:1rem}.claim-explorer__choices{flex-wrap:wrap;gap:8px;display:flex}.claim-explorer__choices button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;text-align:left;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.claim-explorer__choices button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.claim-explorer__statement{background:#a889ff0b;border-left:2px solid #b6a0ff;border-radius:6px;margin:20px 0;padding:18px}.claim-explorer__statement p{color:#e1d4ff;margin:0}.claim-explorer figure{margin:24px 0}.claim-explorer__picture{border:1px solid #8daee54a;border-radius:8px;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;min-height:100px;padding:18px;display:flex}.claim-explorer__group{border:1px solid #aa99de77;border-radius:8px;grid-template-columns:repeat(2,14px);gap:8px;padding:12px;display:grid}.claim-explorer__stone{background:#91c6f5;border-radius:50%;width:14px;height:14px;display:block}.claim-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.claim-explorer__verdict{border-top:1px solid #8daee54a;margin-top:20px;padding-top:12px}.claim-explorer__verdict h4{color:#e1d4ff;margin:16px 0 10px;font-size:1.125rem;line-height:1.5}.claim-explorer__verdict .claim-explorer__calculation{color:#e1d4ff;font-size:1.25rem}.claim-explorer__explanation{background:#8eb6ed0b;border-left:2px solid #8eb6ed;margin-bottom:0;padding:16px}.problem-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.problem-explorer>h3{margin-top:0}.problem-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.problem-explorer fieldset{border:0;margin:24px 0;padding:0}.problem-explorer legend{color:#d4def1;margin-bottom:12px;font-size:1rem}.problem-explorer__choices,.problem-explorer__actions{flex-wrap:wrap;gap:8px;display:flex}.problem-explorer button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.problem-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.problem-explorer button:disabled{color:#a4b3cc;cursor:default;background:#16273e80}.problem-explorer .problem-explorer__question{color:#e1d4ff}.problem-explorer__progress{color:#b1c0db;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 24px;margin:24px 0;padding-left:24px;font-size:.875rem;line-height:1.5;display:grid}.problem-explorer__progress li[aria-current=step]{color:#e1d4ff;font-weight:600}.problem-explorer__step{background:#a889ff0b;border-left:2px solid #b6a0ff;border-radius:6px;padding:18px}.problem-explorer__step h4{color:#e1d4ff;margin:12px 0;font-size:1.125rem;line-height:1.5}.problem-explorer__step p:last-child{margin-bottom:0}.problem-explorer__step .problem-explorer__position{color:#bccbe7;margin:0;font-size:.875rem}.problem-explorer figure{margin:24px 0}.problem-explorer__picture,.problem-explorer__groups{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;display:flex}.problem-explorer__picture{border:1px solid #8daee54a;border-radius:8px;padding:18px}.problem-explorer__group{border:1px solid #aa99de77;border-radius:8px;grid-template-columns:repeat(2,14px);gap:8px;padding:12px;display:grid}.problem-explorer__stone{background:#91c6f5;border-radius:50%;width:14px;height:14px;display:block}.problem-explorer__loose,.problem-explorer__extra{border-left:1px dashed #c7bff58c;justify-items:center;gap:8px;padding:12px;display:grid}.problem-explorer__loose>div{gap:8px;display:flex}.problem-explorer__extra .problem-explorer__stone{background:#f5c78f}.problem-explorer__picture p{margin:0;font-size:.875rem}.problem-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.problem-explorer__actions{margin-top:24px}.practice-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.practice-explorer>h3{margin-top:0}.practice-explorer h4{color:#e1d4ff;font-size:1.125rem;line-height:1.5}.practice-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.practice-explorer fieldset{border:0;margin:24px 0;padding:0}.practice-explorer legend,.practice-explorer label{color:#d4def1;font-size:1rem}.practice-explorer__choices{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.practice-explorer button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;text-align:left;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.practice-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.practice-explorer .practice-explorer__question{color:#e1d4ff}.practice-explorer form{margin:24px 0}.practice-explorer label{margin-top:24px;display:block}.practice-explorer form p{color:#bccbe7;margin:8px 0 12px;font-size:.875rem}.practice-explorer input,.practice-explorer textarea{color:#f0f3ff;width:100%;max-width:100%;min-height:44px;font:inherit;background:#0d192c;border:1px solid #8daee580;border-radius:8px;padding:12px;line-height:1.5;display:block}.practice-explorer input{max-width:200px}.practice-explorer textarea{resize:vertical}.practice-explorer input[aria-invalid=true]{border-color:#f5c78f}.practice-explorer form button{margin-top:18px}.practice-explorer__feedback:not(:empty){background:#8eb6ed0b;border-left:2px solid #8eb6ed;margin-top:20px;padding:16px}.practice-explorer__feedback p:first-child{margin-top:0}.practice-explorer__feedback p:last-child{margin-bottom:0}.practice-explorer .practice-explorer__self-check{color:#bccbe7;font-size:.875rem}.operation-order-explorer__preset{color:#e1d4ff;overflow-wrap:anywhere;margin-top:6px;font-size:1.125rem;font-weight:600;display:block}.operation-order-explorer .operation-order-explorer__expression{background:#0d192c;border:1px solid #8daee54a;border-radius:8px;margin:24px 0;padding:18px}.operation-order-explorer__expression strong{color:#f0e9ff;overflow-wrap:anywhere;margin-top:8px;font-size:clamp(1.25rem,3vw,2rem);font-weight:500;display:block}.operation-order-explorer__expression:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.powers-roots-explorer .number-line-explorer__controls label{margin-top:0}.powers-roots-explorer input[type=range]{background:0 0;border:0;max-width:none;padding:0}.powers-roots-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.powers-roots-explorer .powers-roots-explorer__calculation{font-size:clamp(1.125rem,2vw,1.5rem)}.powers-roots-explorer__calculation,.powers-roots-explorer__result{overflow-wrap:anywhere}.fraction-meaning-explorer .number-line-explorer__controls label{margin-top:0}.fraction-meaning-explorer input[type=range]{background:0 0;border:0;max-width:none;padding:0}.fraction-meaning-explorer__bars{gap:16px;display:grid}.fraction-meaning-explorer__bar{box-sizing:border-box;background:#0d192c;border:1px solid #8daee580;border-radius:6px;width:100%;min-height:52px;display:grid;overflow:hidden}.fraction-meaning-explorer__part{border-right:1px solid #b4c4e280;min-width:0}.fraction-meaning-explorer__part:last-child{border-right:0}.fraction-meaning-explorer__part--selected{background:#8f79ce}.fraction-meaning-explorer .fraction-meaning-explorer__bar-label{margin:0 0 6px;font-size:.875rem}.fraction-meaning-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.fraction-meaning-explorer__result{overflow-wrap:anywhere}.fraction-equivalence-explorer .fraction-equivalence-explorer__fraction-controls{min-width:0;margin:0}.fraction-equivalence-explorer .number-line-explorer__controls label{margin-top:0}.fraction-equivalence-explorer .number-line-explorer__controls input+label{margin-top:16px}.fraction-equivalence-explorer input[type=range]{background:0 0;border:0;max-width:none;padding:0}.fraction-equivalence-explorer select{box-sizing:border-box;color:#f0f3ff;width:100%;max-width:640px;min-height:44px;font:inherit;background:#0d192c;border:1px solid #8daee580;border-radius:8px;margin-top:8px;padding:10px 12px;display:block}.fraction-equivalence-explorer select:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.fraction-equivalence-explorer__fraction-picture+.fraction-equivalence-explorer__fraction-picture{margin-top:24px}.fraction-equivalence-explorer__partition-pair{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.fraction-equivalence-explorer__bar{box-sizing:border-box;background:#0d192c;border:1px solid #8daee580;border-radius:6px;width:100%;min-height:48px;display:grid;overflow:hidden}.fraction-equivalence-explorer__part{border-right:1px solid #b4c4e280;min-width:0}.fraction-equivalence-explorer__part:last-child{border-right:0}.fraction-equivalence-explorer__part--selected{background:#8f79ce}.fraction-equivalence-explorer .fraction-equivalence-explorer__bar-label{margin:0 0 8px;font-size:.875rem}.fraction-equivalence-explorer .fraction-equivalence-explorer__magnitude{font-size:.875rem}.fraction-equivalence-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.fraction-equivalence-explorer__result,.fraction-equivalence-explorer__magnitude{overflow-wrap:anywhere}.fraction-operations-explorer__bars{gap:16px;display:grid}.fraction-operations-explorer__bar{box-sizing:border-box;background:#0d192c;border:1px solid #8daee580;border-radius:6px;width:100%;min-height:48px;display:grid;overflow:hidden}.fraction-operations-explorer__part{border-right:1px solid #b4c4e280;min-width:0}.fraction-operations-explorer__part:last-child{border-right:0}.fraction-operations-explorer__part--selected{background:#8f79ce}.fraction-operations-explorer .fraction-operations-explorer__magnitude{font-size:.875rem}.fraction-operations-explorer__area{box-sizing:border-box;aspect-ratio:1;background:#0d192c;border:1px solid #8daee580;border-radius:6px;width:100%;max-width:320px;margin:0 auto;display:grid;overflow:hidden}.fraction-operations-explorer__cell{border:1px solid #b4c4e280;min-width:0;min-height:0}.fraction-operations-explorer__cell--row{background:#294c70}.fraction-operations-explorer__cell--column{background:#483962}.fraction-operations-explorer__cell--selected{background:#8f79ce}.fraction-operations-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.fraction-operations-explorer__result,.fraction-operations-explorer__equation,.fraction-operations-explorer__magnitude{overflow-wrap:anywhere}.decimal-conversion-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.decimal-conversion-explorer__result,.decimal-conversion-explorer__equation{overflow-wrap:anywhere}.decimal-conversion-explorer__table-wrap{max-width:100%;overflow-x:auto}.decimal-conversion-explorer__table{border-collapse:collapse;text-align:left;width:100%}.decimal-conversion-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.decimal-conversion-explorer__table :is(th,td){vertical-align:top;border-bottom:1px solid #8daee54d;padding:8px}.decimal-conversion-explorer__table th{font-size:.875rem;line-height:1.6}.ratios-rates-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.ratios-rates-explorer__svg .foundation-diagram__marker{paint-order:stroke;stroke:#0d192c;stroke-width:4px;stroke-linejoin:round}.ratios-rates-explorer__result,.ratios-rates-explorer__equation{overflow-wrap:anywhere}.ratios-rates-explorer__bundles{flex-wrap:wrap;gap:12px;display:flex}.ratios-rates-explorer__bundle{background:#0d192c;border:1px solid #8daee580;border-radius:8px;grid-template-columns:repeat(5,28px);gap:6px;padding:10px;display:grid}.ratios-rates-explorer__token{color:#102039;border-radius:4px;place-items:center;width:28px;height:28px;font-size:.875rem;font-weight:700;display:grid}.ratios-rates-explorer__token--a{background:#8bcbfa}.ratios-rates-explorer__token--b{background:#c6afff}.ratios-rates-explorer__table-wrap{max-width:100%;overflow-x:auto}.ratios-rates-explorer__table{border-collapse:collapse;text-align:left;width:100%}.ratios-rates-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.ratios-rates-explorer__table :is(th,td){vertical-align:top;border-bottom:1px solid #8daee54d;padding:8px}.ratios-rates-explorer__table th{font-size:.875rem;line-height:1.6}.ratios-rates-explorer__table .is-selected{background:#a38be329}.percentages-explorer__result,.percentages-explorer__equation{overflow-wrap:anywhere}.percentages-explorer__pictures,.percentages-explorer__grids{flex-wrap:wrap;gap:16px;display:flex}.percentages-explorer__pictures>div{min-width:0}.percentages-explorer__grid{background:#0d192c;border:1px solid #8daee580;border-radius:8px;flex:none;grid-template-rows:repeat(10,16px);grid-template-columns:repeat(10,16px);gap:2px;width:max-content;padding:10px;display:grid}.percentages-explorer__cell{background:#263851;width:16px;height:16px;display:block;position:relative}.percentages-explorer__cell--full{background:#8f79ce}.percentages-explorer__partial-fill{background:#8f79ce;position:absolute;inset:0 auto 0 0}.growth-explorer__result,.growth-explorer__equation{overflow-wrap:anywhere}.growth-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.growth-explorer__tick{font-size:24px}.growth-explorer__axis{font-size:26px}.growth-explorer__approximation{overflow-wrap:anywhere;font-size:.875rem;display:block}.growth-explorer__table-wrap{max-width:100%;overflow-x:auto}.growth-explorer__table{border-collapse:collapse;text-align:left;width:100%}.growth-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.growth-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.growth-explorer__table th{font-size:.875rem;line-height:1.6}.growth-explorer__table .is-selected{background:#a38be329}.quantities-units-explorer__result,.quantities-units-explorer__equation{overflow-wrap:anywhere}.quantities-units-explorer__svg{width:100%;max-width:640px;height:auto;margin:0 auto;display:block}.quantities-units-explorer__tick{font-size:24px}.quantities-units-explorer__axis{font-size:26px}.quantities-units-explorer__table-wrap{max-width:100%;overflow-x:auto}.quantities-units-explorer__table{border-collapse:collapse;text-align:left;width:100%}.quantities-units-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.quantities-units-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.quantities-units-explorer__table th{font-size:.875rem;line-height:1.6}.quantities-units-explorer__table .is-selected{background:#a38be329}.unit-conversions-explorer__result,.unit-conversions-explorer__equation{overflow-wrap:anywhere}.unit-conversions-explorer__cancelled{color:#c6afff;text-decoration:line-through;text-decoration-thickness:2px}.unit-conversions-explorer__table-wrap{max-width:100%;overflow-x:auto}.unit-conversions-explorer__table{border-collapse:collapse;text-align:left;width:100%}.unit-conversions-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.unit-conversions-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.unit-conversions-explorer__table th{font-size:.875rem;line-height:1.6}.unit-conversions-explorer__table .is-selected{background:#a38be329}.practice-explorer__solution{border-top:1px solid #8daee54a;margin-top:24px;padding-top:18px}.practice-explorer__solution h4{margin-top:0}.practice-explorer__solution li{color:#c4d0e9;margin-bottom:10px;line-height:1.7}.practice-explorer figure{margin:24px 0 0}.practice-explorer__picture,.practice-explorer__groups{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;display:flex}.practice-explorer__picture{border:1px solid #8daee54a;border-radius:8px;padding:18px}.practice-explorer__group{border:1px solid #aa99de77;border-radius:8px;grid-template-columns:repeat(2,14px);gap:8px;padding:12px;display:grid}.practice-explorer__dot{background:#91c6f5;border-radius:50%;width:14px;height:14px;display:block}.practice-explorer__loose{border-left:1px dashed #c7bff58c;justify-items:center;gap:8px;padding:12px;display:grid}.practice-explorer__loose>div{gap:8px;display:flex}.practice-explorer__loose p{margin:0;font-size:.875rem}.practice-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.counting-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.counting-explorer>h3{margin-top:0}.counting-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.counting-explorer fieldset{border:0;margin:24px 0;padding:0}.counting-explorer legend,.counting-explorer label{color:#d4def1;font-size:1rem;line-height:1.5}.counting-explorer__quantity{margin-top:24px}.counting-explorer__quantity>label{display:block}.counting-explorer input[type=range]{accent-color:#bbabff;cursor:pointer;width:100%;min-height:44px;margin:8px 0;display:block}.counting-explorer__choices{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.counting-explorer button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;text-align:left;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.counting-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.counting-explorer button:disabled{opacity:.55;cursor:default}.counting-explorer button:focus-visible,.counting-explorer input:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.counting-explorer__toggle{cursor:pointer;align-items:center;gap:12px;min-height:44px;display:flex}.counting-explorer__toggle input{accent-color:#bbabff;flex-shrink:0;width:22px;height:22px}.counting-explorer figure{margin:24px 0}.counting-explorer__picture{border:1px solid #8daee54a;border-radius:8px;place-items:center;min-height:240px;padding:16px 8px;display:grid}.counting-explorer__picture>p{text-align:center}.counting-explorer__counters{grid-template-columns:repeat(4,38px);gap:8px;display:grid}.counting-explorer__picture--spread .counting-explorer__counters{grid-template-columns:repeat(3,38px);gap:24px}.counting-explorer__counter{color:#092038;background:#91c6f5;border:2px solid #bbdeff;border-radius:50%;place-items:center;width:38px;height:38px;font-size:1rem;font-weight:600;display:grid}.counting-explorer__counter--last{color:#fff;background:#604782;border:4px double #f1e3ff}.counting-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.counting-explorer .counting-explorer__result{color:#e1d4ff;font-weight:600}.place-value-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.place-value-explorer>h3{margin-top:0}.place-value-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.place-value-explorer fieldset{border:0;margin:24px 0;padding:0}.place-value-explorer legend,.place-value-explorer label{color:#d4def1;font-size:1rem;line-height:1.5}.place-value-explorer__presets{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.place-value-explorer button{color:#dce5f5;min-width:44px;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.place-value-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.place-value-explorer button:focus-visible,.place-value-explorer select:focus-visible,.place-value-explorer summary:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.place-value-explorer__controls{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:24px 0;display:grid}.place-value-explorer__controls label{margin-bottom:8px;display:block}.place-value-explorer__controls label span{color:#b6c9e8;font-size:.875rem;display:block}.place-value-explorer select{color:#f0f3ff;width:100%;min-width:0;min-height:44px;font:inherit;background:#0d192c;border:1px solid #8daee580;border-radius:8px;padding:8px}.place-value-explorer__chart{text-align:center;margin:24px 0}.place-value-explorer__chart>div{justify-content:center;gap:8px;display:flex}.place-value-explorer__chart span{color:#f0e9ff;background:#252340;border:1px solid #b6a0ff;border-radius:8px;place-items:center;width:52px;height:56px;font-size:1.75rem;font-weight:600;display:grid}.place-value-explorer .place-value-explorer__note{color:#bccbe7;font-size:.875rem}.place-value-explorer figure{margin:24px 0}.place-value-explorer__picture{gap:16px;display:grid}.place-value-explorer__column{border:1px solid #8daee54a;border-radius:8px;min-width:0;padding:16px}.place-value-explorer__column>p{margin:0;font-size:.875rem}.place-value-explorer__blocks{flex-wrap:wrap;align-items:flex-start;gap:10px;min-height:20px;margin:16px 0;display:flex}.place-value-explorer__blocks>p{margin:0;font-size:.875rem}.place-value-explorer__block{background-color:#91c6f5;background-image:linear-gradient(90deg,#173451 1px,#0000 1px),linear-gradient(#173451 1px,#0000 1px);background-size:10px 10px;flex-shrink:0;width:10px;height:10px;display:block;box-shadow:inset -1px -1px #173451}.place-value-explorer__block--hundreds{width:100px;height:100px}.place-value-explorer__block--tens{height:100px}.place-value-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.place-value-explorer .place-value-explorer__result{color:#e1d4ff;overflow-wrap:anywhere;font-weight:600}.place-value-explorer__binary{border-top:1px solid #8daee54a;margin-top:24px;padding-top:12px}.place-value-explorer__binary summary{color:#ded4ff;cursor:pointer;min-height:44px;padding:8px 0;line-height:1.6}.place-value-explorer__equivalent{overflow-wrap:anywhere}.place-value-explorer__equivalent span{font-weight:600}.place-value-explorer__binary ul{grid-template-columns:repeat(auto-fit,minmax(min(180px,100%),1fr));gap:10px;padding:0;list-style:none;display:grid}.place-value-explorer__binary li{color:#c4d0e9;border:1px solid #8daee54a;border-radius:8px;gap:6px;min-width:0;padding:12px;font-size:.875rem;line-height:1.5;display:grid}.place-value-explorer__binary li strong{color:#e1d4ff;font-weight:600}.number-line-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.number-line-explorer>h3{margin-top:0}.number-line-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.number-line-explorer fieldset{border:0;margin:24px 0;padding:0}.number-line-explorer legend,.number-line-explorer label{color:#d4def1;font-size:1rem;line-height:1.5}.number-line-explorer__choices{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.number-line-explorer button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.number-line-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.number-line-explorer button:focus-visible,.number-line-explorer input:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.number-line-explorer__controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.number-line-explorer__controls label{display:block}.number-line-explorer input[type=range]{accent-color:#bbabff;cursor:pointer;width:100%;min-height:44px;margin:8px 0;display:block}.number-line-explorer figure{margin:24px 0}.number-line-explorer__diagram{background:#0d192c66;border:1px solid #8daee54a;border-radius:8px}.number-line-explorer__plot{height:184px;margin:0 20px;position:relative}.number-line-explorer__axis{border-top:2px solid #a5caef;width:100%;position:absolute;top:110px}.number-line-explorer__axis:before,.number-line-explorer__axis:after{content:"";border-top:5px solid #0000;border-bottom:5px solid #0000;width:0;height:0;position:absolute;top:-6px}.number-line-explorer__axis:before{border-right:8px solid #a5caef;left:-8px}.number-line-explorer__axis:after{border-left:8px solid #a5caef;right:-8px}.number-line-explorer__tick{position:absolute;top:104px}.number-line-explorer__tick>span{background:#a5caef;width:1px;height:14px;display:block}.number-line-explorer__tick small{color:#d2dff1;font-variant-numeric:tabular-nums;font-size:.75rem;line-height:1.5;position:absolute;top:22px;left:0;transform:translate(-50%)}.number-line-explorer__marker{width:24px;position:absolute;transform:translate(-50%)}.number-line-explorer__marker--a{top:14px}.number-line-explorer__marker--b{top:62px}.number-line-explorer__marker>span{z-index:1;color:#fff;background:#604782;border:1px solid #d1bfff;border-radius:50%;place-items:center;width:24px;height:24px;font-size:.875rem;font-weight:600;line-height:1;display:grid;position:relative}.number-line-explorer__marker--b>span{background:#255e82;border-color:#bee4ff;border-radius:3px}.number-line-explorer__marker i{background:#a5caef;width:2px;height:72px;position:absolute;top:24px;left:11px}.number-line-explorer__marker--b i{height:24px}.number-line-explorer__marker i:after{content:"";background:#ddedff;border-radius:50%;width:6px;height:6px;position:absolute;bottom:-3px;left:-2px}.number-line-explorer__interval{border:1px solid #bdd7f4;border-top-width:3px;border-bottom:0;height:8px;position:absolute;top:154px}.number-line-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.number-line-explorer .number-line-explorer__note{color:#bccbe7;font-size:.875rem}.number-line-explorer__result{background:#a5caef0b;border-left:2px solid #a5caef;margin-top:24px;padding:16px}.number-line-explorer__result p{margin:8px 0}.number-line-explorer__result p:first-child{margin-top:0}.number-line-explorer__result p:last-child{margin-bottom:0}.number-line-explorer__result strong{color:#e1d4ff;font-size:1.25rem}.negative-number-explorer .number-line-explorer__plot{height:230px}.negative-number-explorer__zero>span{background:#e1d4ff;width:2px}.negative-number-explorer__zero small{color:#fff;font-weight:700}.negative-number-explorer__zero-interval{border-color:#d1bfff;top:166px}.negative-number-explorer__between-interval{border-color:#a5caef;top:198px}.addition-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.addition-explorer,.addition-explorer *{box-sizing:border-box}.addition-explorer>h3{margin-top:0}.addition-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.addition-explorer fieldset{border:0;margin:24px 0;padding:0}.addition-explorer legend,.addition-explorer label{color:#d4def1;font-size:1rem;line-height:1.5}.addition-explorer__choices{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.addition-explorer button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.addition-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.addition-explorer button:focus-visible,.addition-explorer input:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.addition-explorer__controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:24px 0;display:grid}.addition-explorer__controls label{display:block}.addition-explorer input[type=range]{accent-color:#bbabff;cursor:pointer;width:100%;min-height:44px;margin:8px 0;display:block}.addition-explorer figure{margin:24px 0}.addition-explorer__collection,.addition-explorer__diagram{background:#0d192c66;border:1px solid #8daee54a;border-radius:8px}.addition-explorer__collection{padding:16px}.addition-explorer .addition-explorer__whole{text-align:center;margin:0 0 16px}.addition-explorer__parts{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.addition-explorer__part{border:1px solid #8daee54a;border-radius:8px;min-width:0;padding:12px}.addition-explorer__part>p{margin:0}.addition-explorer__part>p>span{color:#bccbe7;font-size:.875rem;display:block}.addition-explorer__tokens{flex-wrap:wrap;gap:10px;min-height:24px;margin-top:12px;display:flex}.addition-explorer__tokens>p{margin:0;font-size:.875rem}.addition-explorer__token{background:#519bd3;border:1px solid #bee4ff;border-radius:50%;flex-shrink:0;width:20px;height:20px;position:relative}.addition-explorer__token--b{background:#9370c1;border-color:#d8c5ff;border-radius:3px}.addition-explorer__token--removed{background:#24334b}.addition-explorer__token--removed:before,.addition-explorer__token--removed:after{content:"";background:#f3e8ff;width:16px;height:2px;position:absolute;top:8px;left:1px;transform:rotate(45deg)}.addition-explorer__token--removed:after{transform:rotate(-45deg)}.addition-explorer__plot{height:184px;margin:0 20px;position:relative}.addition-explorer__axis{border-top:2px solid #a5caef;width:100%;position:absolute;top:110px}.addition-explorer__tick{position:absolute;top:104px}.addition-explorer__tick>span{background:#a5caef;width:1px;height:14px;display:block}.addition-explorer__tick small{color:#d2dff1;font-variant-numeric:tabular-nums;font-size:.75rem;line-height:1.5;position:absolute;top:22px;left:0;transform:translate(-50%)}.addition-explorer__marker{width:32px;position:absolute;transform:translate(-50%)}.addition-explorer__marker--start{top:14px}.addition-explorer__marker--result{top:62px}.addition-explorer__marker>span{z-index:1;color:#fff;background:#255e82;border:1px solid #bee4ff;border-radius:50%;place-items:center;width:32px;height:24px;font-size:.875rem;font-weight:600;line-height:1;display:grid;position:relative}.addition-explorer__marker--result>span{background:#604782;border-color:#d1bfff;border-radius:3px}.addition-explorer__marker i{background:#a5caef;width:2px;height:72px;position:absolute;top:24px;left:15px}.addition-explorer__marker--result i{height:24px}.addition-explorer__marker i:after{content:"";background:#ddedff;border-radius:50%;width:6px;height:6px;position:absolute;bottom:-3px;left:-2px}.addition-explorer__interval{border-top:2px solid #bdd7f4;height:8px;position:absolute;top:154px}.addition-explorer__interval:after{content:"";border-top:4px solid #0000;border-bottom:4px solid #0000;width:0;height:0;position:absolute;top:-5px}.addition-explorer__interval--right:after{border-left:4px solid #bdd7f4;right:0}.addition-explorer__interval--left:after{border-right:4px solid #bdd7f4;left:0}.addition-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.addition-explorer__result{background:#a5caef0b;border-left:2px solid #a5caef;padding:16px}.addition-explorer__result p{margin:8px 0}.addition-explorer__result p:first-child{margin-top:0}.addition-explorer__result p:last-child{margin-bottom:0}.addition-explorer__result strong{color:#e1d4ff;font-size:1.25rem}.addition-explorer .addition-explorer__note{color:#bccbe7;font-size:.875rem}.multiplication-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.multiplication-explorer,.multiplication-explorer *{box-sizing:border-box}.multiplication-explorer>h3{margin-top:0}.multiplication-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.7}.multiplication-explorer fieldset{border:0;margin:24px 0;padding:0}.multiplication-explorer legend,.multiplication-explorer label{color:#d4def1;font-size:1rem;line-height:1.5}.multiplication-explorer__choices{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.multiplication-explorer button{color:#dce5f5;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px 12px}.multiplication-explorer button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.multiplication-explorer button:focus-visible,.multiplication-explorer input:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.multiplication-explorer__controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:24px 0;display:grid}.multiplication-explorer__controls label{display:block}.multiplication-explorer input[type=range]{accent-color:#bbabff;cursor:pointer;width:100%;min-height:44px;margin:8px 0;display:block}.multiplication-explorer .multiplication-explorer__question{color:#e1d4ff;border-left:2px solid #b6a0ff;padding-left:12px}.multiplication-explorer figure{margin:24px 0}.multiplication-explorer__picture{background:#0d192c66;border:1px solid #8daee54a;border-radius:8px;padding:16px}.multiplication-explorer .multiplication-explorer__arrangement{color:#d4def1;margin:0 0 16px}.multiplication-explorer__groups{grid-template-columns:repeat(auto-fit,minmax(min(180px,100%),1fr));gap:12px;display:grid}.multiplication-explorer__group{border:1px solid #b6a0ff66;border-radius:8px;min-width:0;padding:12px}.multiplication-explorer__group>p{color:#ded4ff;margin:0}.multiplication-explorer__tokens{flex-wrap:wrap;gap:6px;min-height:20px;margin-top:12px;display:flex}.multiplication-explorer__tokens>p{color:#bccbe7;margin:0;font-size:.875rem}.multiplication-explorer__token{background:#519bd3;border:1px solid #bee4ff;border-radius:50%;flex-shrink:0;width:18px;height:18px;display:block}.multiplication-explorer figcaption{color:#bccbe7;margin-top:12px;font-size:.875rem;line-height:1.6}.multiplication-explorer__sum{overflow-wrap:anywhere}.multiplication-explorer__result{background:#a5caef0b;border-left:2px solid #a5caef;padding:16px}.multiplication-explorer__result p{margin:8px 0}.multiplication-explorer__result p:first-child{margin-top:0}.multiplication-explorer__result p:last-child{margin-bottom:0}.multiplication-explorer__result strong{color:#e1d4ff}.multiplication-explorer__result p:first-child strong{font-size:1.25rem}.multiplication-explorer__result ul{color:#c4d0e9;margin:12px 0 0;padding-left:20px;font-size:1rem;line-height:1.7}.multiplication-explorer .multiplication-explorer__note{color:#bccbe7;font-size:.875rem}.quantity-explorer{background:#112038a6;border:1px solid #8eb6ed4d;border-radius:12px;margin-top:30px;padding:24px!important}.quantity-explorer>h3{margin-top:0}.quantity-explorer>p{color:#c4d0e9;font-size:1rem;line-height:1.7}.quantity-explorer fieldset{border:0;margin:24px 0;padding:0}.quantity-explorer legend{color:#d4def1;margin-bottom:12px;font-size:1rem}.quantity-explorer__choices{flex-wrap:wrap;gap:8px;display:flex}.quantity-explorer__choices button{color:#dce5f5;min-width:44px;min-height:44px;font:inherit;cursor:pointer;background:#16273e;border:1px solid #8daee54a;border-radius:8px;padding:8px}.quantity-explorer__choices button[aria-pressed=true]{color:#fff;background:#51437d;border-color:#b6a0ff}.quantity-explorer__representations{grid-template-columns:1fr 1fr;gap:24px;display:grid}.quantity-explorer__picture{border:1px solid #8daee533;border-radius:8px;flex-wrap:wrap;place-content:center;align-items:center;gap:12px;min-height:180px;padding:16px;display:flex}.quantity-explorer__picture p{color:#c4d0e9}.quantity-explorer__group{border:1px solid #aa99de77;border-radius:8px;grid-template-columns:repeat(2,14px);gap:8px;padding:12px;display:grid}.quantity-explorer__group span{background:#91c6f5;border-radius:50%;width:14px;height:14px}.quantity-explorer table{border-collapse:collapse;color:#d6e2f3;width:100%;font-size:1rem}.quantity-explorer caption{text-align:left;margin-bottom:10px;font-size:.875rem;line-height:1.5}.quantity-explorer th,.quantity-explorer td{text-align:left;border-bottom:1px solid #8daee52e;padding:8px 12px}.quantity-explorer tr.is-selected{background:#a48ae62b}.quantity-explorer__result{font-weight:600;color:#e1d4ff!important}@media (width<=760px){.foundation-lesson .knowledge-preview__article{width:calc(100% - 40px);padding-top:104px}.foundation-lesson .knowledge-preview__body{display:block}.foundation-lesson .knowledge-preview__contents{margin-bottom:36px;position:static}.foundation-lesson__next{margin-left:0}}@media (width<=520px){.quantity-explorer,.equality-explorer,.representation-explorer,.claim-explorer,.problem-explorer,.practice-explorer,.counting-explorer,.place-value-explorer{padding:18px!important}.place-value-explorer__controls{gap:8px}.place-value-explorer__controls label{font-size:.875rem}.place-value-explorer__blocks{gap:8px}.number-line-explorer{padding:18px!important}.number-line-explorer__controls{grid-template-columns:minmax(0,1fr);gap:12px}.fraction-equivalence-explorer__partition-pair{grid-template-columns:minmax(0,1fr)}.addition-explorer{padding:18px!important}.addition-explorer__controls,.addition-explorer__parts{grid-template-columns:minmax(0,1fr);gap:12px}.multiplication-explorer{padding:18px!important}.multiplication-explorer__controls{grid-template-columns:minmax(0,1fr);gap:12px}.problem-explorer__progress{grid-template-columns:minmax(0,1fr)}.quantity-explorer__representations{grid-template-columns:1fr}}@media (width<=680px){.representation-explorer__views{grid-template-columns:minmax(0,1fr)}}.knowledge-preview__topbar{z-index:2;justify-content:space-between;align-items:center;gap:24px;width:min(1280px,100% - 48px);margin:0 auto;padding:34px 0;display:flex;position:relative}.knowledge-preview__article{z-index:1;width:min(1280px,100% - 48px);margin:0 auto;padding:105px 0 90px;position:relative}.knowledge-preview__hero{max-width:940px;padding:105px 0 90px}.knowledge-preview__status{color:#eaecff94;letter-spacing:.15em;text-transform:uppercase;border:1px solid #cdc3ff33;border-radius:999px;align-items:center;gap:9px;width:fit-content;margin-bottom:34px;padding:8px 13px;font-size:9px;font-weight:700;display:flex}.knowledge-preview__status span{background:#9f86ff;border-radius:50%;width:6px;height:6px;box-shadow:0 0 13px #9f86ff}.knowledge-preview h1{letter-spacing:-.065em;text-wrap:balance;margin:25px 0 28px;font-family:Georgia,Times New Roman,serif;font-size:clamp(4rem,8vw,8rem);font-weight:400;line-height:.91}.knowledge-preview__lead{color:#edefffa8;max-width:790px;margin:0;font-size:clamp(1.05rem,1.6vw,1.3rem);line-height:1.8}.knowledge-preview__meta{color:#edefff6b;letter-spacing:.12em;text-transform:uppercase;border-top:1px solid #dfe4ff21;justify-content:space-between;gap:20px;margin-top:44px;padding-top:22px;font-size:10px;font-weight:700;display:flex}.knowledge-preview__body{grid-template-columns:260px minmax(0,760px);justify-content:space-between;align-items:start;gap:8vw;display:grid}.knowledge-preview__contents{border-top:1px solid #dfe4ff26;border-bottom:1px solid #dfe4ff26;padding:25px 0;position:sticky;top:30px}.knowledge-preview__contents>p{color:#b6a5ff;letter-spacing:.18em;text-transform:uppercase;margin:0 0 22px;font-size:9px;font-weight:700}.knowledge-preview__contents nav{display:grid}.knowledge-preview__contents a{color:#eef0ff85;grid-template-columns:32px 1fr;gap:8px;padding:11px 0;font-size:12px;line-height:1.45;text-decoration:none;display:grid}.knowledge-preview__contents a:hover{color:#fff}.knowledge-preview__contents a span{color:#b7a7ff94;font-size:9px}.knowledge-preview__note{background:#8d74f012;border-left:2px solid #8c73ef;margin-bottom:72px;padding:27px 30px}.knowledge-preview__note span{color:#baaaff;letter-spacing:.18em;text-transform:uppercase;font-size:9px;font-weight:700}.knowledge-preview__note p{color:#edefffa6;margin:15px 0 0;font-size:14px;line-height:1.75}.knowledge-preview__sections section{padding:0 0 82px;scroll-margin-top:125px}.knowledge-preview__number{color:#9e88f3;letter-spacing:.14em;margin-bottom:18px;font-size:10px;display:block}.knowledge-preview__sections h2{letter-spacing:-.045em;max-width:680px;margin:0 0 22px;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.6rem,4vw,4.4rem);font-weight:400;line-height:1.02}.knowledge-preview__summary{max-width:680px;font-family:Georgia,serif;color:#cfc4ff!important;margin:0 0 29px!important;font-size:19px!important;line-height:1.55!important}.knowledge-preview__sections section>p{color:#edefff99;max-width:690px;margin:0 0 20px;font-size:15px;line-height:1.85}.knowledge-preview__related{border-top:1px solid #dfe4ff26;margin-left:calc(260px + 8vw);padding:55px 0}.knowledge-preview__related>div{border-top:1px solid #dfe4ff1a;grid-template-columns:repeat(2,1fr);margin-top:25px;display:grid}.knowledge-preview__related>div>span{color:#edefff99;border-bottom:1px solid #dfe4ff1a;align-items:center;gap:16px;min-height:82px;padding:20px 12px;font-size:13px;display:flex}.knowledge-preview__related i{color:#9782e8;font-size:9px;font-style:normal}@media (width<=1050px){.world-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.world-card h2{font-size:clamp(2.2rem,4.6vw,3.3rem)}.topic-intro__content{text-align:center;grid-template-columns:1fr}.topic-intro__copy{margin:0 auto}.topic-intro__rule,.topics-button--accent{margin-inline:auto}.world-visual--large{grid-row:1;justify-self:center;width:min(500px,76vw)}.physics-map__parts{grid-template-columns:repeat(2,minmax(0,1fr))}.knowledge-preview__body{grid-template-columns:220px minmax(0,1fr);gap:6vw}.knowledge-preview__related{margin-left:calc(220px + 6vw)}}@media (width<=720px){.topics-hero{min-height:720px;padding:110px 24px 80px}.topics-hero h1{font-size:clamp(3.7rem,17vw,6rem)}.topics-hero__guide{margin-top:50px}.worlds-section{padding:72px 20px 88px}.topics-section-heading{grid-template-columns:1fr;gap:22px;margin-bottom:38px}.world-grid{grid-template-columns:1fr;gap:14px}.world-card,.world-card__link{min-height:470px}.world-card h2{font-size:2.65rem}.connected-section{padding:88px 22px 74px}.constellation-map{margin-top:28px}.constellation-map text{display:none}.topics-development{grid-template-columns:auto 1fr;padding:54px 24px}.topics-development .topics-button{grid-column:1/-1;justify-self:start}.topic-intro__shell{padding:100px 24px 62px}.topic-intro__content{gap:42px;padding:48px 0 10px}.topic-intro h1{font-size:clamp(3.9rem,17vw,6rem)}.world-visual--large{width:min(420px,88vw)}.physics-map{padding:82px 20px 96px}.physics-map__heading{grid-template-columns:1fr;gap:24px;margin-bottom:44px}.physics-map__heading>p{padding-bottom:0}.physics-map__parts{grid-template-columns:1fr}.physics-part-button{min-height:128px}.physics-map__part-heading{flex-direction:column;align-items:flex-start;gap:18px;min-height:0;padding:28px 22px}.physics-map__part-heading>p{margin:0}.physics-chapter__button{grid-template-columns:37px minmax(0,1fr) 30px;gap:12px;min-height:96px;padding:21px 20px}.physics-chapter__panel{padding:0 20px 24px}.physics-lessons{grid-template-columns:1fr}.physics-lessons li{min-height:76px}.knowledge-preview__topbar,.knowledge-preview__article{width:min(100% - 40px,1280px)}.knowledge-preview__hero{padding:72px 0 66px}.knowledge-preview h1{font-size:clamp(3.7rem,16vw,5.7rem)}.knowledge-preview__meta{flex-direction:column}.knowledge-preview__body{display:block}.knowledge-preview__contents{margin-bottom:62px;position:static}.knowledge-preview__related{margin-left:0}.knowledge-preview__related>div{grid-template-columns:1fr}}@media (width<=420px){.topics-hero h1{font-size:3.65rem}.world-card__body{padding-inline:23px}.topics-development{grid-template-columns:1fr}.topics-development__mark{margin-left:8px}.topics-development .topics-button{grid-column:auto;width:100%}.topic-intro h1{font-size:4rem}.physics-map__heading h2{font-size:3.4rem}.physics-map__search-control{min-height:58px}.physics-map__search-control input{padding-inline:14px}.physics-map__search-control button{min-width:67px;padding-inline:11px}.physics-part-button{padding-inline:20px}.physics-chapter__button{grid-template-columns:30px minmax(0,1fr) 27px;gap:9px;padding-inline:15px}.physics-chapter__title strong{font-size:1.12rem}.physics-chapter__toggle{width:27px;height:27px}.physics-chapter__panel{padding-inline:15px}.physics-lessons li{grid-template-columns:24px minmax(0,1fr)}.physics-lesson__status{grid-column:2;justify-self:start}.topic-intro__topbar,.knowledge-preview__topbar{align-items:flex-start}.knowledge-preview__topbar .topics-back-link{max-width:190px}}@media (prefers-reduced-motion:reduce){.topics-page *,.topics-page :before,.topics-page :after,.topic-intro *,.topic-intro :before,.topic-intro :after,.knowledge-preview *,.knowledge-preview :before,.knowledge-preview :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.direction-orbit:before,.direction-orbit i,.direction-orbit strong,.knowledge-preview .topics-cosmos *{animation:none!important}}.topics-directions-hero{background:#070a18;min-height:100svh;padding:150px 0 110px;position:relative;overflow:hidden}.topics-directions-hero .topics-hero__language{justify-content:flex-end;width:min(1280px,100% - 48px);margin:0 auto;display:flex;position:relative;inset:auto}.directions-explorer{--direction-accent:#a99cff;--direction-deep:#24184d;z-index:2;width:min(1280px,100% - 48px);margin:54px auto 0;position:relative}.directions-heading h1{letter-spacing:-.07em;text-shadow:0 0 55px color-mix(in srgb, var(--direction-accent) 18%, transparent);margin:18px 0 24px;font-family:Georgia,serif;font-size:clamp(4.5rem,9vw,9rem);font-weight:400;line-height:.87}.directions-heading>p:last-child{max-width:690px;color:var(--topics-muted);font-size:16px;line-height:1.8}.directions-stage{border:1px solid var(--topics-line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#090d1eb8;grid-template-columns:minmax(240px,.7fr) minmax(0,1.3fr);min-height:520px;margin-top:72px;display:grid}.direction-tabs{border-right:1px solid var(--topics-line);flex-direction:column;display:flex}.direction-tabs button{border:0;border-bottom:1px solid var(--topics-line);color:#f0f2ff8c;text-align:left;cursor:pointer;background:0 0;flex:1;grid-template-columns:38px 1fr;align-items:center;gap:12px;min-height:88px;padding:20px 24px;font:600 13px/1.35 Arial,sans-serif;transition:color .25s,background .25s,padding .25s;display:grid}.direction-tabs button:last-child{border-bottom:0}.direction-tabs button span{color:#f0f2ff40;letter-spacing:.14em;font-size:9px}.direction-tabs button:hover,.direction-tabs button[aria-selected=true]{color:#fff;background:linear-gradient(90deg, color-mix(in srgb, var(--direction-accent) 14%, transparent), transparent);padding-left:31px}.direction-tabs button[aria-selected=true]{box-shadow:inset 2px 0 var(--direction-accent)}.direction-tabs button:focus-visible{z-index:2;outline-offset:-4px;outline:2px solid #fff;position:relative}.direction-panel{background:radial-gradient(circle at 70% 38%, color-mix(in srgb, var(--direction-accent) 22%, transparent), transparent 30%), linear-gradient(145deg, color-mix(in srgb, var(--direction-deep) 75%, #070a18), #080b1b);align-items:flex-end;padding:clamp(40px,6vw,82px);display:flex;position:relative;overflow:hidden}.direction-panel__copy{z-index:2;max-width:620px;position:relative}.direction-number{color:var(--direction-accent);margin-bottom:20px;font-size:25px;display:block}.direction-panel h2{letter-spacing:-.06em;max-width:600px;margin:0 0 22px;font-family:Georgia,serif;font-size:clamp(3rem,5.5vw,6rem);font-weight:400;line-height:.92}.direction-panel p{color:#eff1ffa3;max-width:570px;margin:0;font-size:15px;line-height:1.75}.direction-orbit{aspect-ratio:1;opacity:.7;border-radius:50%;width:min(430px,50vw);position:absolute;top:-8%;right:-2%}.direction-orbit:before{content:"";border:1px solid color-mix(in srgb, var(--direction-accent) 19%, transparent);border-top-color:color-mix(in srgb, var(--direction-accent) 28%, transparent);border-right-color:color-mix(in srgb, var(--direction-accent) 13%, transparent);will-change:transform;border-radius:50%;animation:66s linear infinite direction-orbit-outer;position:absolute;inset:0}.direction-orbit i{border:1px solid color-mix(in srgb, var(--direction-accent) 25%, transparent);will-change:transform;border-radius:50%;animation:82s linear infinite direction-orbit-inner-one;position:absolute;inset:18%;transform:rotate(35deg)scaleY(.55)}.direction-orbit i:nth-child(2){animation-name:direction-orbit-inner-two;animation-duration:92s;inset:32%;transform:rotate(-22deg)scaleY(.72)}.direction-orbit strong{color:var(--direction-accent);text-shadow:0 0 27px;place-items:center;font:400 52px Georgia,serif;animation:7.5s ease-in-out infinite direction-symbol-breathe;display:grid;position:absolute;inset:0}@keyframes direction-orbit-outer{to{transform:rotate(360deg)}}@keyframes direction-orbit-inner-one{to{transform:rotate(-325deg)scaleY(.55)}}@keyframes direction-orbit-inner-two{to{transform:rotate(-382deg)scaleY(.72)}}@keyframes direction-symbol-breathe{0%,to{opacity:.94;text-shadow:0 0 26px}50%{opacity:1;text-shadow:0 0 31px}}.direction-subjects,#topic-status{scroll-margin-top:125px}.direction-subjects__heading{justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px;display:flex}.direction-subjects__heading h2{letter-spacing:-.045em;margin:0;font-family:Georgia,serif;font-size:clamp(2rem,4vw,4rem);font-weight:400}.subject-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;display:grid}.subject-card{border:1px solid var(--topics-line);color:#fff;background:#ffffff06;flex-direction:column;align-items:flex-start;min-height:165px;padding:24px;text-decoration:none;display:flex;position:relative}.subject-card--linked:hover{border-color:color-mix(in srgb, var(--direction-accent) 48%, transparent);background:color-mix(in srgb, var(--direction-accent) 8%, transparent);transform:translateY(-3px)}.subject-card h3,.subject-card h2{margin:auto 0 0;font-family:Georgia,serif;font-size:1.35rem;font-weight:400;line-height:1.12}.subject-card small{color:#eef0ff6b;letter-spacing:.08em;text-transform:uppercase;margin-top:10px;font-size:9px}.subject-card .subject-card__note{color:#eef0ff7a;letter-spacing:0;text-transform:none;max-width:94%;font-size:9px;font-weight:400;line-height:1.45}.subject-card b{color:var(--direction-accent);font-weight:400;position:absolute;top:17px;right:18px}.status{color:#f0f2ff85;letter-spacing:.13em;text-transform:uppercase;border:1px solid #ffffff21;border-radius:99px;padding:6px 9px;font-size:8px;font-weight:700}.status--open{color:#9ce9c8;border-color:#70deb04d}.status--growing{color:#b9ccff;border-color:#82a6ff4d}.complete-ark{color:#15172a;background:#f4f1e9;padding:110px max(24px,50vw - 640px) 120px}.catalogue-columns{grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;display:grid}.catalogue-direction{background:#ffffff59;border-top:1px solid #14172a40;padding:24px 20px}.catalogue-direction h3{gap:10px;min-height:48px;margin:0 0 24px;font-family:Georgia,serif;font-size:1.15rem;font-weight:400;display:flex}.catalogue-direction ul{margin:0;padding:0;list-style:none}.catalogue-direction li{border-top:1px solid #14172a17;flex-direction:column;gap:5px;min-height:54px;padding:11px 0;display:flex}.catalogue-direction li a{text-underline-offset:3px;text-decoration-color:#7662b373}.catalogue-direction li small{color:#14172a6b;letter-spacing:.11em;text-transform:uppercase;font-size:8px;font-weight:700}.catalogue-direction li em{color:#14172a85;font-size:9px;font-style:normal;line-height:1.45}.direction-intro{--direction-accent:#a99cff;--direction-deep:#24184d;color:#fff;background:linear-gradient(150deg, #070a18, color-mix(in srgb, var(--direction-deep) 45%, #070a18));min-height:100svh;padding:0 max(24px,50vw - 640px) 100px;position:relative;overflow:hidden}.direction-intro__topbar{z-index:2;justify-content:space-between;gap:24px;padding:34px 0;display:flex;position:relative}.direction-intro__hero{z-index:1;max-width:900px;padding:185px 0 80px;position:relative}.direction-intro__symbol{color:var(--direction-accent);text-shadow:0 0 30px;margin-bottom:28px;font-size:40px;display:block}.direction-intro h1{letter-spacing:-.07em;margin:24px 0 28px;font-family:Georgia,serif;font-size:clamp(4.4rem,9vw,9rem);font-weight:400;line-height:.88}.direction-intro__hero>p:last-child{max-width:700px;color:var(--topics-muted);font-size:17px;line-height:1.8}.direction-intro__subjects{z-index:1;border-top:1px solid var(--topics-line);padding-top:46px;position:relative}.direction-intro__subjects>.topics-kicker{margin-bottom:28px}@media (width<=1000px){.directions-stage{grid-template-columns:1fr}.direction-tabs{border-right:0;border-bottom:1px solid var(--topics-line);grid-template-columns:repeat(auto-fit,minmax(10rem,1fr));display:grid}.direction-tabs button{border-right:1px solid var(--topics-line);border-bottom:0;flex-direction:column;justify-content:center;min-height:110px;padding:15px;display:flex}.direction-tabs button:hover,.direction-tabs button[aria-selected=true]{box-shadow:inset 0 2px var(--direction-accent);padding-left:15px}.subject-grid,.catalogue-columns{grid-template-columns:repeat(2,1fr)}}@media (width<=620px){.topics-directions-hero{padding-top:105px}.directions-explorer{width:min(100% - 32px,1280px);margin-top:46px}.directions-heading h1{font-size:clamp(4rem,20vw,6rem)}.directions-stage{margin-top:48px}.direction-tabs{grid-template-columns:1fr}.direction-tabs button{border-right:0;border-bottom:1px solid var(--topics-line);flex-direction:row;justify-content:flex-start;min-height:62px}.direction-panel{min-height:500px;padding:34px 25px}.direction-panel h2{font-size:3.4rem}.direction-orbit{width:92vw;right:-35%}.direction-subjects__heading{flex-direction:column;align-items:flex-start}.subject-grid,.catalogue-columns{grid-template-columns:1fr}.subject-card{min-height:145px}.complete-ark{padding:80px 20px}.direction-intro__hero{padding:120px 0 60px}.direction-intro h1{font-size:clamp(4rem,19vw,6rem)}}.topics-page,.topic-intro,.direction-intro{--topics-muted:#b7c4df;--topics-line:#c6d6ff26;--topics-text:#f3f6ff}.topics-kicker{color:#b7a6ef;letter-spacing:.13em;font-size:.75rem;line-height:1.6}.topics-directions-hero{padding-top:172px;padding-bottom:75px}.directions-explorer{margin-top:0}.directions-heading{max-width:100%}.directions-heading h1{letter-spacing:-.045em;margin:18px 0;font-size:clamp(3rem,6.2vw,6rem);line-height:1.06}.directions-heading>p:last-child{max-width:760px;margin-bottom:0;line-height:1.85}.directions-stage{border-radius:18px;grid-template-columns:minmax(280px,.8fr) minmax(0,1.2fr);min-height:435px;margin-top:38px;overflow:hidden}.direction-tabs button{color:#bdc9e4;grid-template-columns:28px 1fr;padding:20px 24px;font-family:inherit;font-size:1rem;font-weight:500;line-height:1.5;transition:background .2s,color .2s}.direction-tabs button span{color:#a697ce;font-size:.75rem}.direction-tabs button:hover,.direction-tabs button[aria-selected=true]{padding-left:24px}.direction-panel{padding:40px 46px}.direction-panel h2{letter-spacing:-.04em;font-size:clamp(2.5rem,4.3vw,4.4rem);line-height:1.09}.direction-panel p{color:#c4cfea;font-size:1rem;line-height:1.85}.direction-panel .topics-button--accent{--world-accent:var(--direction-accent);margin-top:26px}.direction-orbit{opacity:.42}.topics-button{letter-spacing:.025em;text-transform:none;border-radius:9px;min-height:48px;font-size:.875rem;line-height:1.5}.direction-subjects{padding-top:52px}.direction-subjects__heading{align-items:center}.direction-subjects__heading h2{font-size:clamp(1.75rem,3vw,2.75rem)}.subject-grid{gap:15px}.subject-card{background:#0e152bcc;border-radius:12px;min-height:190px;padding:24px}.subject-card--linked{border-color:color-mix(in srgb, var(--direction-accent) 38%, #ffffff15);background:linear-gradient(145deg, color-mix(in srgb, var(--direction-accent) 11%, #10182c), #10172b);transition:background .2s,border-color .2s}.subject-card--linked:hover{border-color:var(--direction-accent);transform:none}.subject-card h3,.subject-card h2{margin-top:26px;font-size:1.5rem;line-height:1.25}.subject-card small,.subject-card .subject-card__note{color:#afbdd9;letter-spacing:0;text-transform:none;font-size:.8125rem;line-height:1.6}.subject-card b{font-size:1.125rem}.status{color:#c1cde7;letter-spacing:.04em;text-transform:none;border-color:#abbada42;padding:4px 9px;font-size:.75rem}.status--open{color:#a0edca}.status--growing{color:#b7d1ff}.complete-ark{background:#f5f7fc;padding-block:76px 90px}.complete-ark .topics-kicker{color:#6b4cb2}.topics-section-heading{gap:36px}.topics-section-heading h2{letter-spacing:-.045em;font-size:clamp(2.5rem,4.6vw,4.6rem);line-height:1.12}.complete-ark .topics-section-heading>p{color:#52617c;font-size:1rem;line-height:1.8}.catalogue-columns{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;gap:22px}.catalogue-direction{border:1px solid #dbe2ef;border-top:3px solid color-mix(in srgb, var(--catalogue-accent,#7655bd) 65%, #2f3151);background:#fff;border-radius:12px;padding:26px}.catalogue-direction h3{min-height:0;margin-bottom:22px;font-size:1.45rem;line-height:1.35}.catalogue-direction h3 a{text-decoration:none}.catalogue-direction h3 a:hover{color:#6341ab}.catalogue-direction h3 span{color:#6d4aad}.catalogue-direction li{border-color:#e7ebf4;gap:6px;min-height:70px;padding-block:13px}.catalogue-direction li span,.catalogue-direction li a{color:#24324c;font-size:1rem;line-height:1.55}.catalogue-direction li a{color:#6342aa;text-underline-offset:4px;font-weight:550;text-decoration-color:#9e86c6}.catalogue-direction li a:hover{color:#3e2473}.catalogue-direction li small{letter-spacing:.055em;color:#61708a;font-size:.75rem;line-height:1.5}.catalogue-direction li em{color:#596985;font-size:.8125rem;line-height:1.6}.complete-ark a:focus-visible,.topics-development a:focus-visible{outline-color:#6242a9}.topics-development{background:#fff}.topics-development p{color:#24304a}.topics-back-link,.topic-intro__home{letter-spacing:.025em;text-transform:none;font-size:.875rem;line-height:1.5;color:#c3cde3!important}.topic-intro__shell{padding-top:155px}.topic-intro h1{letter-spacing:-.04em;font-size:clamp(3rem,6.7vw,7rem);line-height:1.06}.topic-intro__message{font-size:1rem;line-height:1.85}.direction-intro__hero{padding-top:174px;padding-bottom:55px}.direction-intro h1{letter-spacing:-.045em;font-size:clamp(3rem,6.6vw,6.7rem);line-height:1.06}.direction-intro__symbol{margin-bottom:15px}.physics-map__empty button+button{margin-left:12px}@media (width<=1000px){.directions-stage{grid-template-columns:minmax(240px,.8fr) minmax(0,1.2fr)}.direction-tabs{border-right:1px solid var(--topics-line);border-bottom:0;flex-direction:column;display:flex}.direction-tabs button{text-align:left;border-right:0;border-bottom:1px solid var(--topics-line);grid-template-columns:25px 1fr;min-height:84px;display:grid}.direction-tabs button:hover,.direction-tabs button[aria-selected=true]{box-shadow:inset 2px 0 var(--direction-accent)}.catalogue-columns{grid-template-columns:repeat(2,minmax(0,1fr))}.direction-panel{padding:34px 28px}}@media (width<=900px){.topics-directions-hero{padding-top:118px}.topic-intro__shell{padding-top:105px}.direction-intro__hero{padding-top:122px}}@media (width<=620px){.directions-explorer{width:calc(100% - 40px)}.directions-heading h1{font-size:clamp(2.8rem,11vw,4rem);line-height:1.08}.directions-heading>p:last-child{line-height:1.8}.directions-stage{grid-template-columns:1fr;margin-top:28px}.direction-tabs{border-right:0;border-bottom:1px solid var(--topics-line)}.direction-tabs button{min-height:65px;padding:16px 20px}.direction-tabs button:hover,.direction-tabs button[aria-selected=true]{padding-left:20px}.direction-panel{min-height:345px;padding:30px 24px}.direction-panel h2{font-size:2.6rem}.direction-number{margin-bottom:12px}.subject-grid{grid-template-columns:1fr}.subject-card{min-height:155px}.subject-card h3,.subject-card h2{margin-top:22px}.catalogue-columns{grid-template-columns:1fr}.complete-ark{padding:55px 20px}.catalogue-direction{padding:24px}.topics-section-heading h2{font-size:2.7rem}.topic-intro h1,.direction-intro h1{font-size:clamp(2.75rem,11.8vw,4.5rem);line-height:1.1}.topic-intro__content{padding-top:34px}.physics-map__heading h2{font-size:clamp(2.6rem,10vw,3.4rem);line-height:1.15}}.topic-browser{background:#f5f7fc;padding-top:166px;padding-bottom:64px}.topic-browser__heading{max-width:800px;margin-bottom:30px}.topic-browser__heading :is(h1,h2){color:#18213a;letter-spacing:-.045em;margin:10px 0 14px;font-size:clamp(2.3rem,4.6vw,4rem);font-weight:500;line-height:1.15}.topic-browser__heading>p:not(.topics-kicker){color:#4e5e79;margin:0 0 12px;font-size:1rem;line-height:1.8}.topic-browser__heading>a{color:#5c3c9d;text-underline-offset:4px;align-items:center;min-height:44px;font-size:.875rem;display:inline-flex}.topic-browser__filters{background:#fff;border:1px solid #d8deec;border-radius:14px;grid-template-columns:minmax(0,1.4fr) minmax(230px,1fr);gap:18px 24px;padding:24px;display:grid}.topic-browser__filters label{color:#34405b;margin-bottom:8px;font-size:.875rem;font-weight:550;display:block}.topic-browser__search>div{position:relative}.topic-browser input[type=search],.topic-browser select{color:#1b2640;width:100%;min-height:50px;font:inherit;background:#fff;border:1px solid #bbc6da;border-radius:8px;padding:12px 14px;font-size:1rem}.topic-browser input[type=search]{padding-right:48px}.topic-browser input::placeholder{color:#65748f;opacity:1}.topic-browser input::-webkit-search-cancel-button{display:none}.topic-browser__search button{color:#4d3a78;cursor:pointer;background:0 0;border:0;border-radius:6px;width:44px;min-height:44px;padding:0;font-size:1.6rem;position:absolute;top:3px;right:3px}.topic-browser__filters .topic-browser__available{cursor:pointer;grid-column:1/-1;align-items:center;gap:10px;width:fit-content;min-height:44px;margin:-5px 0 0;display:flex}.topic-browser__available input{accent-color:#6846d8;width:20px;height:20px;margin:0}.topic-browser :is(input,select,button):focus-visible{outline-offset:3px;outline:3px solid #6846d8}.topic-browser__count{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 20px;min-height:65px;display:flex}.topic-browser__count p{color:#52617c;margin:10px 0;font-size:.875rem}.topic-browser__count button,.topic-browser__empty button{color:#53358d;min-height:44px;font:inherit;cursor:pointer;background:#fff;border:1px solid #cfc2e9;border-radius:7px;padding:8px 12px;font-size:.875rem}.topic-browser .catalogue-columns{align-items:start}.topic-browser .catalogue-direction{min-width:0}.topic-browser .catalogue-direction h2{align-items:flex-start;gap:10px;min-height:58px;margin:0 0 16px;font-size:1.125rem;font-weight:600;line-height:1.5;display:flex}.topic-browser .catalogue-direction h2 span{color:#7955b4}.topic-browser .catalogue-direction h2 a{color:#24304a;text-decoration:none}.topic-browser .catalogue-direction h2 a:hover{text-underline-offset:4px;text-decoration:underline}.catalogue-topic__title{flex-direction:column;gap:6px;display:flex}.topic-browser .catalogue-direction li .catalogue-topic__ready{color:#22694b;font-weight:650}.topic-browser .catalogue-direction li .catalogue-topic__reading{color:#583894;background:#f5f0ff;border:1px solid #d7caef;border-radius:7px;align-items:center;width:fit-content;min-height:44px;margin-top:2px;padding:8px 10px;font-size:.875rem;line-height:1.5;text-decoration:none;display:inline-flex}.topic-browser .catalogue-direction li .catalogue-topic__reading:hover{background:#eae1fb}.topic-browser__note{color:#55637d;max-width:800px;margin:24px 0 0;font-size:.875rem;line-height:1.7}.topic-browser__empty{background:#fff;border:1px solid #d8deec;border-radius:12px;padding:36px 24px}.topic-browser__empty h2{margin:0 0 10px;font-size:1.25rem}.topics-page .topics-directions-hero{min-height:0;padding-top:64px}.directions-heading>h2{letter-spacing:-.045em;margin:18px 0;font-family:Georgia,serif;font-size:clamp(2.5rem,5vw,5rem);font-weight:400;line-height:1.1}.subject-card--available{border-color:color-mix(in srgb, var(--direction-accent) 38%, #ffffff15)}.subject-card__actions{flex-wrap:wrap;align-items:center;gap:8px 12px;width:100%;margin-top:18px;display:flex}.subject-card__actions a{color:#e0d4ff;border:1px solid #b69ad966;border-radius:8px;flex-direction:column;justify-content:center;min-height:44px;padding:8px 12px;font-size:.875rem;line-height:1.5;text-decoration:none;display:inline-flex}.subject-card__actions a:first-child{background:#bba2ff14}.subject-card__actions a:hover{background:#bba2ff28}.subject-card__actions a span{color:#c4cfe8;font-size:.75rem}.ark-breadcrumbs{z-index:1;color:#c3cde3;font-size:.875rem;line-height:1.65;position:relative}.ark-breadcrumbs ol{flex-wrap:wrap;align-items:center;gap:4px 12px;margin:0 0 20px;padding:0;list-style:none;display:flex}.ark-breadcrumbs li{align-items:center;gap:12px;display:flex}.ark-breadcrumbs li+li:before{content:"/";color:#7e8dac}.ark-breadcrumbs a{color:#cfc0ff;text-underline-offset:4px;align-items:center;min-height:44px;display:inline-flex}.ark-breadcrumbs [aria-current=page]{color:#dde5f7}.topic-intro__shell{min-height:0}.topic-intro__content{padding:20px 0 40px}.topic-reading{flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:24px;display:flex}.topic-reading .topics-button{margin-top:0}.topic-reading>p{color:#c3cde3;flex-basis:100%;margin:0;font-size:.875rem;line-height:1.8}.topic-intro #topic-status .topics-back-link{margin-top:18px}.direction-intro__actions{flex-wrap:wrap;align-items:center;gap:14px 24px;margin-top:24px;display:flex}.direction-intro__actions .topics-button{--world-accent:var(--direction-accent);margin-top:0}@media (width<=900px){.topic-browser{padding-top:108px}}@media (width<=620px){.topic-browser{padding-top:104px;padding-bottom:44px}.topic-browser__heading{margin-bottom:20px}.topic-browser__filters{grid-template-columns:minmax(0,1fr);gap:16px;padding:18px}.topic-browser .catalogue-direction h2{min-height:0}.topic-browser__filters .topic-browser__available{font-size:.875rem}.topics-page .topics-directions-hero{padding-top:44px}.directions-heading>h2{font-size:2.6rem}.topic-intro__content{padding-top:12px}}.catalogue-plans{border-top:1px solid #dce1ed;margin-top:14px}.catalogue-plans summary{color:#596580;cursor:pointer;min-height:48px;padding:13px 0;font-size:.875rem;display:list-item}.catalogue-plans summary:focus-visible{outline-offset:3px;outline:3px solid #6846d8}.topic-browser .catalogue-direction li .catalogue-topic__overview{align-items:center;width:fit-content;min-height:44px;font-size:.875rem;display:inline-flex}.subject-plans{border:1px solid var(--topics-line);border-radius:10px;margin-top:24px;padding:0 20px}.subject-plans summary{color:#c3cde3;cursor:pointer;min-height:54px;padding:14px 0;font-size:.875rem}.subject-plans summary:focus-visible{outline-offset:3px;outline:3px solid #a18bff}.subject-plans .subject-grid{padding-bottom:20px}.topic-browser{color:#f1f4ff;background:radial-gradient(at 80% 0,#24194566,#0000 42%),linear-gradient(150deg,#070a18,#0c1228)}.topic-browser__heading{max-width:100%}.topic-browser__heading .topics-kicker{color:#baa7ef}.topic-browser__heading :is(h1,h2){color:#f1f4ff}.topic-browser__heading>p:not(.topics-kicker){color:#b9c7e3;max-width:820px}.topic-domain-shortcuts{flex-wrap:wrap;gap:10px;margin-top:24px;display:flex}.topic-domain-shortcuts a{color:#e3dcfa;background:#a995e50b;border:1px solid #b6a4eb3d;border-radius:9px;align-items:center;gap:10px;min-height:46px;padding:10px 14px;font-size:.875rem;line-height:1.5;text-decoration:none;display:inline-flex}.topic-domain-shortcuts a:hover{background:#a995e51b;border-color:#b6a4eb80}.topic-browser__filters{background:#10172b;border-color:#b2c1ee2b}.topic-browser__filters label{color:#ccd7ef}.topic-browser input[type=search],.topic-browser select{color:#eff3ff;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;background:#0a1022;border-color:#a1b3de55}.topic-browser input::placeholder{color:#9aaacc}.topic-browser__search button{color:#d6c6ff}.topic-browser__search button:hover{background:#b69bf529}.topic-browser__count p,.topic-browser__note{color:#b4c2dd}.topic-browser__count button,.topic-browser__empty button{color:#e2d5ff;background:#1c2040;border-color:#bda4ef55}.topic-browser__empty{background:#10172b;border-color:#b2c1ee2b}.topic-browser__empty p{color:#b9c7e3}.topic-domains{flex-direction:column;gap:44px;display:flex}.topic-domain{min-width:0}.topic-domain__heading{border-bottom:1px solid color-mix(in srgb, var(--catalogue-accent) 28%, transparent);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 20px;margin-bottom:18px;padding-bottom:16px;display:flex}.topic-domain__heading h2{align-items:center;gap:14px;margin:0;font-size:clamp(1.375rem,2.5vw,1.875rem);font-weight:500;line-height:1.4;display:flex}.topic-domain__heading h2>span{color:var(--catalogue-accent)}.topic-domain__heading h2 a{color:#e8edfc;text-decoration:none}.topic-domain__heading h2 a:hover{color:var(--catalogue-accent)}.topic-domain__heading>span{color:#9cafce;font-size:.875rem}.topic-tile-grid{grid-template-columns:repeat(5,minmax(0,1fr));align-items:stretch;gap:16px;margin:0;padding:0;list-style:none;display:grid}.topic-tile-grid li{min-width:0}.topic-tile-cell{border:1px solid color-mix(in srgb, var(--catalogue-accent) 28%, #1b253d);background:linear-gradient(145deg, color-mix(in srgb, var(--catalogue-deep) 64%, #0f182c), #0b1225);border-radius:14px;flex-direction:column;min-height:190px;transition:border-color .2s,background .2s;display:flex;position:relative;box-shadow:inset 0 1px #e4eaff0a,0 5px #03081799}.topic-tile-cell:hover,.topic-tile-cell:focus-within{border-color:var(--catalogue-accent);background:linear-gradient(145deg, color-mix(in srgb, var(--catalogue-deep) 80%, #1a2544), #111a31)}.topic-tile{color:#eff3ff;text-align:left;width:100%;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:14px;flex-direction:column;flex:1;align-items:flex-start;gap:16px;padding:22px;text-decoration:none;display:flex;position:relative}.topic-tile__symbol{color:var(--catalogue-accent);font-size:1.5rem;line-height:1}.topic-tile__title{color:#eef2ff;overflow-wrap:anywhere;font-size:1rem;font-weight:550;line-height:1.5;display:block}.topic-tile__status{color:#acbbd6;flex-direction:column;gap:4px;margin-top:auto;font-size:.875rem;line-height:1.5;display:flex}.topic-tile__status small{color:#acbbd6;font-size:.75rem}.topic-tile__status.is-readable{color:#a4e7cd}.topic-browser :is(a,button,input,select):focus-visible{outline-offset:4px;outline:3px solid #ccb5ff}.topic-preview{color:#f0f3ff;background:#10162c;border:1px solid #ba9fec70;border-radius:16px;width:min(540px,100% - 36px);max-height:calc(100svh - 48px);padding:0;box-shadow:0 24px 100px #020511b3}.topic-preview::backdrop{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#030717ce}.topic-preview__content{padding:28px}.topic-preview__close{color:#e2d5ff;min-height:44px;font:inherit;cursor:pointer;background:#a68bea13;border:1px solid #bca4ef55;border-radius:7px;margin:0 0 20px auto;padding:8px 14px;font-size:.875rem;display:block}.topic-preview h2{margin:12px 0 18px;font-size:clamp(1.75rem,5vw,2.4rem);line-height:1.25}.topic-preview p:not(.topics-kicker){color:#bfcee8;font-size:1rem;line-height:1.8}.topics-page .topics-development{color:#eef2ff;background:#0c1228;border-top:1px solid #a7b8e329}.topics-page .topics-development p{color:#b8c7e4}.topics-page .topics-development a{color:#e0d0ff}@media (width<=1100px){.topic-tile-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (width<=800px){.topic-tile-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=620px){.topic-domain-shortcuts{gap:8px}.topic-domain-shortcuts a{padding:9px 11px}.topic-tile-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-tile-cell{min-height:175px}.topic-tile{gap:15px;padding:17px}.topic-domain__heading h2{font-size:1.3rem}.topic-domains{gap:34px}.topic-preview__content{padding:22px}}@media (width<=350px){.topic-tile-grid{grid-template-columns:1fr}}.topic-tile__reading{border:1px solid color-mix(in srgb, var(--catalogue-accent) 35%, transparent);overflow-wrap:anywhere;background:#11192d;border-radius:8px;flex-direction:column;align-items:flex-start;gap:3px;min-height:44px;margin:0 16px 16px;padding:10px 12px;font-size:.875rem;line-height:1.5;text-decoration:none;display:flex;color:#e5d9ff!important}.topic-tile__reading small{color:#afbedb;font-size:.75rem}.topic-tile__reading:hover{border-color:var(--catalogue-accent);background:#24223f}.topics-page .topics-directions-hero{padding-top:128px}.topics-page .topic-browser{padding-top:64px}@media (width<=900px){.topics-page .topics-directions-hero{padding-top:118px}}@media (width<=620px){.topics-page .topic-browser{padding-top:44px}}.topic-intro--mapped .topic-intro__content{text-align:left;grid-template-columns:minmax(0,1fr);padding:20px 0 0}.topic-intro--mapped .topic-intro__copy{max-width:100%;margin:0}.topic-intro--mapped h1{font-size:clamp(2.8rem,5vw,4.4rem);line-height:1.1}.topic-intro--mapped .topic-intro__description{max-width:800px;margin-bottom:18px}.topic-intro--mapped .topics-button--accent{margin:18px 0}.topic-intro--mapped .topic-intro__rule{display:none}.topic-intro--mapped .topic-intro__message{max-width:860px;margin:0;font-size:1rem;line-height:1.7}.topic-intro--mapped #topic-status>.topics-back-link{margin-top:12px}.topic-mathematics-link{margin:22px 0 0;font-size:1rem}.topic-mathematics-link a{color:#c9baff;text-underline-offset:4px}.topic-scope{margin-top:24px}.topic-scope__connections p{color:#c3cde3;margin:0 0 10px;font-size:.875rem}.topic-scope__connections ul{flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;display:flex}.topic-scope__connections a{background:#a9b5ff0a;border:1px solid #b7c7ff40;border-radius:10px;padding:10px 14px;font-size:1rem;text-decoration:none;display:block}.topic-scope__connections a:hover{border-color:var(--world-accent);background:#a9b5ff1a}.topic-scope__connections small{color:#b7c4df;margin-top:3px;font-size:.875rem;line-height:1.5;display:block}.topic-scope__areas{margin-top:32px}.topic-scope__areas h2{margin:0 0 10px;font-size:1.6rem}.topic-scope__areas p{color:#b7c4df;margin:0 0 18px;font-size:1rem;line-height:1.7}.topic-scope__areas ol{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0;padding-left:24px;display:grid}.topic-scope__areas li{overflow-wrap:anywhere;background:#a9b5ff08;border:1px solid #b7c7ff26;border-radius:12px;padding:16px;font-size:1rem;line-height:1.6}@media (width<=600px){.topic-scope__areas ol{grid-template-columns:minmax(0,1fr)}}.learning-map{padding:48px 6vw 80px}.learning-map .physics-map__heading{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;margin-bottom:30px}.learning-map .physics-map__heading h2{letter-spacing:-.035em;margin-top:10px;font-size:clamp(2.2rem,4vw,3.5rem);line-height:1.14}.learning-map__introduction p{color:#becae3;margin:0;font-size:1rem;line-height:1.75}.learning-map__introduction .learning-map__totals{color:#d5c9ff;margin-top:16px;font-size:.875rem}.learning-map .physics-map__search>label{letter-spacing:0;text-transform:none;font-size:.875rem}.learning-map .physics-map__search-control input{min-width:0;font-size:1rem}.learning-map .physics-map__search-control button{font-size:.875rem}.learning-map .physics-map__results{font-size:.875rem;line-height:1.6}.learning-map .physics-map__parts{border:0;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.learning-map .physics-part-button{background:linear-gradient(145deg,#181a37,#101629);border:1px solid #c6d6ff26;border-radius:12px;min-height:150px;padding:20px}.learning-map .physics-part-button[aria-selected=true]{background:linear-gradient(145deg,#302755,#141a35);border-color:#baadff;box-shadow:inset 0 3px #bdadff}.learning-map .physics-part-button__label{letter-spacing:.025em;margin-bottom:14px;font-size:.75rem;line-height:1.6}.learning-map .physics-part-button strong{font-family:inherit;font-size:1rem;font-weight:600;line-height:1.45}.learning-map .physics-part-button small{color:#b6c1dd;letter-spacing:0;text-transform:none;font-size:.875rem;line-height:1.5}.learning-map .physics-map__part-panel{border-radius:14px;overflow:hidden}.learning-map .physics-map__part-heading{gap:26px}.learning-map .physics-map__part-heading h3{font-size:clamp(1.6rem,3vw,2.5rem);line-height:1.25}.learning-map .physics-map__part-heading>p{color:#bac7e1;max-width:440px;font-size:1rem;line-height:1.7}.learning-map .physics-map__part-heading span{font-size:.75rem;line-height:1.6}.learning-map .physics-chapter{scroll-margin-top:122px}.learning-map .physics-chapter__number{font-size:.875rem}.learning-map .physics-chapter__title strong{font-size:1.125rem;line-height:1.5}.learning-map .physics-chapter__title small{color:#b6c1dd;letter-spacing:0;text-transform:none;font-size:.875rem}.learning-chapter__guide{color:#becae3;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;margin-bottom:24px;font-size:1rem;line-height:1.7;display:grid}.learning-chapter__guide p{margin:0}.learning-chapter__guide strong,.learning-chapter__connections>strong{color:#e3dbff;margin-bottom:6px;font-size:.875rem;font-weight:600;display:block}.learning-chapter__guide ul,.learning-chapter__connections ul{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.learning-chapter__guide button{color:#e8e1ff;text-align:left;cursor:pointer;background:#27243e;border:1px solid #bdadff50;border-radius:7px;min-height:44px;padding:8px 12px;font-size:.875rem;line-height:1.5}.learning-chapter__guide button:hover{background:#383054}.learning-lessons{counter-reset:lesson;grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:10px;margin:0;padding:0;list-style:none;display:grid}.learning-lessons>li{min-width:0}.learning-lesson{background:#141b30;border:1px solid #c6d6ff26;border-radius:8px;scroll-margin-top:130px}.learning-lesson summary{color:#f0efff;cursor:pointer;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;min-height:88px;padding:16px;font-size:1rem;line-height:1.5;list-style:none;display:grid}.learning-lesson summary::-webkit-details-marker{display:none}.learning-lesson summary:after{content:"+";color:#d4c7ff;grid-area:1/2/3;font-size:1.125rem}.learning-lesson[open] summary:after{content:"−"}.learning-lesson summary small{color:#b5c1dd;grid-column:1;font-size:.875rem}.learning-lesson summary:hover{background:#22223d}.learning-lesson summary:focus-visible,.learning-map a:focus-visible{outline-offset:3px;outline:2px solid #d5c9ff}.learning-lesson>p{color:#bdc9e1;margin:0;padding:0 16px 18px;font-size:1rem;line-height:1.7}.learning-lesson__article{color:#ede5ff;border:1px solid #bdadff65;border-radius:8px;flex-direction:column;min-height:88px;padding:16px;scroll-margin-top:130px;font-size:1rem;line-height:1.5;display:flex}.learning-lesson__article span{margin-top:8px;font-size:.875rem}.learning-chapter__connections{color:#becae3;margin-top:22px;font-size:.875rem;line-height:1.7}.learning-chapter__connections a,.learning-chapter__connections span{border:1px solid #c6d6ff26;border-radius:6px;padding:8px 10px;display:block}.learning-chapter__connections a{color:#d6c8ff;text-underline-offset:3px}@media (width<=1000px){.learning-map .physics-map__parts{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-map .physics-map__heading{grid-template-columns:minmax(0,1fr);gap:20px}}@media (width<=620px){.topic-intro--mapped .topic-intro__shell{padding:112px 22px 28px}.topic-intro--mapped .topic-intro__content{padding-top:18px}.learning-map{padding:34px 20px 60px}.learning-map .physics-part-button{min-height:150px;padding:15px}.learning-map .physics-map__part-heading{flex-direction:column;align-items:flex-start;gap:12px}.learning-map .physics-map__part-heading>p{margin:0}.learning-chapter__guide,.learning-lessons{grid-template-columns:minmax(0,1fr)}}@media (width<=390px){.learning-map .physics-map__parts{grid-template-columns:minmax(0,1fr)}}.learning-map__starting-path{background:#161a34;border:1px solid #bdadff40;border-radius:12px;margin:0 0 28px;padding:22px}.learning-map__starting-path h3{color:#e4dcff;margin:0 0 10px;font-size:1.125rem;line-height:1.5}.learning-map__starting-path p{color:#bdc9e1;max-width:850px;margin:0;font-size:1rem;line-height:1.75}.learning-map__starting-path ol{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0 0;padding:0;list-style:none;display:grid}.learning-map__starting-path button{color:#eee9ff;text-align:left;cursor:pointer;background:#252340;border:1px solid #bdadff50;border-radius:8px;align-items:center;gap:12px;width:100%;height:100%;min-height:70px;padding:14px;font-size:1rem;line-height:1.5;display:flex}.learning-map__starting-path button:hover{background:#343056}.learning-map__starting-path button span{color:#c9baff;font-size:1.125rem}.learning-map__coverage{margin:0 0 28px}.learning-map__coverage>header h3{color:#e4dcff;margin:0 0 10px;font-size:1.25rem;line-height:1.5}.learning-map__coverage>header p,.learning-map__coverage-note{color:#bdc9e1;max-width:900px;margin:0 0 14px;font-size:1rem;line-height:1.75}.learning-map__coverage>header .learning-map__coverage-count{color:#cfbeff;font-size:.875rem}.learning-map__coverage-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:14px;display:grid}.learning-coverage-area{background:#161a34;border:1px solid #bdadff40;border-radius:12px;min-width:0}.learning-coverage-area>summary{color:#eee9ff;cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:18px;display:flex}.learning-coverage-area>summary strong{min-width:0;font-size:1rem;line-height:1.5}.learning-coverage-area>summary span{color:#b4c7e8;flex-shrink:0;font-size:.875rem}.learning-coverage-area>summary:hover{background:#252340;border-radius:12px}.learning-coverage-area>summary:after{content:"+";color:#c9baff;font-size:1.25rem}.learning-coverage-area[open]>summary:after{content:"−"}.learning-coverage-area__body{padding:0 18px 18px}.learning-coverage-area__body>p{color:#bdc9e1;margin:0 0 18px;font-size:1rem;line-height:1.75}.learning-coverage-area__body h4{color:#e4dcff;margin:20px 0 10px;font-size:1rem;line-height:1.5}.learning-coverage-area__reading{color:#b4c7e8;gap:10px;margin:0;padding-left:20px;display:grid}.learning-coverage-area__reading a{color:#d6c8ff;text-underline-offset:4px;overflow-wrap:anywhere;padding-block:5px;font-size:1rem;line-height:1.6;display:inline-block}.learning-map__coverage-note{margin-top:14px}@media (width<=720px){.learning-map__coverage-grid{grid-template-columns:minmax(0,1fr)}.learning-coverage-area>summary{flex-wrap:wrap}}.learning-map__legacy-anchor{scroll-margin-top:122px;display:block}.learning-chapter__other-preparation{margin-top:16px}.learning-reference-links{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.learning-reference-links a,.learning-reference-links button{color:#e8e1ff;text-align:left;cursor:pointer;background:#27243e;border:1px solid #bdadff50;border-radius:7px;min-height:44px;padding:8px 12px;font-size:.875rem;line-height:1.5;text-decoration:none;display:block}.learning-reference-links a:hover,.learning-reference-links button:hover{background:#383054}.learning-lesson__references{padding:0 16px 18px}.learning-lesson__references strong{color:#e3dbff;margin-bottom:8px;font-size:.875rem;line-height:1.5;display:block}@media (width>=1001px){.learning-map--physics .physics-map__parts{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=720px){.learning-map__starting-path ol{grid-template-columns:minmax(0,1fr)}}.topic-intro--mapped{overflow:clip}.topic-intro--mapped .topic-intro__shell{padding-top:calc(var(--ark-header-height) + 24px);padding-bottom:8px}.topic-intro--mapped .ark-breadcrumbs ol{margin-bottom:10px}.topic-intro--mapped .topic-intro__content{padding:0}.topic-intro--mapped h1{margin:8px 0 14px;font-size:clamp(2.25rem,4.5vw,3.75rem)}.topic-intro--mapped .topic-intro__description{max-width:950px;margin-bottom:0;font-size:1.125rem;line-height:1.6}.topic-intro__connections{z-index:1;width:min(1320px,100%);margin:0 auto;padding:0 6vw 60px;position:relative}.topic-intro__connections .topic-scope{margin-top:0}.topic-intro__connections .topic-scope__connections>h2{color:#e5e9fb;margin:0 0 16px;font-size:1.375rem;font-weight:550;line-height:1.4}.topic-intro__connections .topic-scope__connections ul{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:12px;display:grid}.topic-intro__connections .topic-scope__connections li{min-width:0}.topic-intro__connections .topic-scope__connections a{color:#e6e9f9;overflow-wrap:anywhere;background:linear-gradient(145deg,#18233cc2,#14192eb3);border-radius:14px;flex-direction:column;justify-content:center;height:100%;min-height:76px;padding:16px 18px;line-height:1.5;transition:background .2s,border-color .2s;display:flex}.topic-intro__connections .topic-scope__connections a:hover{border-color:color-mix(in srgb, var(--world-accent) 55%, #c6d6ff26);background:#202940}.topic-intro__connections .topic-reading{margin-top:24px}.learning-map{border-top:0;padding-top:16px;padding-bottom:28px;position:relative}.learning-map__title{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.learning-map__hub-title{margin:0 0 20px;font-size:1.5rem;line-height:1.4}.learning-map__tools{min-width:0;scroll-margin-top:calc(var(--ark-header-height) + 20px);background:linear-gradient(120deg,#16223a,#19192f);border:1px solid #c6d6ff26;border-radius:14px;margin-top:28px;padding:22px;position:relative}.learning-map .physics-map__search{margin:0}.learning-map .physics-map__search>label{color:#d8e3fa;margin-bottom:12px;font-size:1rem;font-weight:600}.learning-map .physics-map__search-control{border-radius:8px;min-height:48px}.learning-map .physics-map__search-control input{padding:10px 14px}.learning-map .physics-map__search-control input::placeholder{color:#b7c4df}.learning-map .physics-map__search-control button{letter-spacing:0;text-transform:none;border-radius:5px;min-width:64px;margin:4px;padding:0 10px}.learning-map .physics-map__results{color:#b7c4df;letter-spacing:0;margin:0;line-height:1.5}.learning-map__search-footer{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 18px;margin-top:12px;display:flex}.learning-map__view-results{color:#f2eaff;cursor:pointer;background:#353054;border:1px solid #b5a1f780;border-radius:8px;min-height:44px;padding:9px 16px;font-size:.875rem;font-weight:600}.learning-map__view-results:hover{background:#484068}.learning-map .physics-map__parts{gap:14px;margin-top:8px}.learning-map .physics-part-button{background:linear-gradient(145deg,#18233c,#14192e);border-radius:14px;min-width:0;padding:22px;transition:border-color .2s,background .2s,box-shadow .2s}.learning-map .physics-part-button:hover{border-color:color-mix(in srgb, var(--world-accent) 48%, #c6d6ff26);box-shadow:0 8px 24px #03071630}.learning-map .physics-part-button[aria-selected=true]{border-color:color-mix(in srgb, var(--world-accent) 62%, #baadff);box-shadow:inset 0 3px color-mix(in srgb, var(--world-accent) 60%, #bdadff);background:linear-gradient(145deg,#2d3151,#1b2340)}.learning-map .physics-part-button__label{letter-spacing:0;text-transform:none;margin-bottom:14px;font-size:.875rem;line-height:1.5}.learning-map .physics-part-button strong{max-width:none;font-size:1.125rem;line-height:1.45}.learning-map .physics-part-button small{color:#c3cce3}.learning-map .physics-map__part-panel{margin-top:16px}.learning-map .physics-map__part-heading{min-height:0;padding:20px 24px}.learning-map .physics-map__part-heading span{letter-spacing:0;text-transform:none;margin-bottom:4px;font-size:.875rem;line-height:1.5}.learning-map .physics-map__part-heading h3{font-size:clamp(1.4rem,2.5vw,2rem)}.learning-map .physics-chapter__button{min-height:80px;padding:16px 24px}.learning-map .physics-chapter__panel[hidden]{display:none}.learning-map .physics-chapter__button:hover,.learning-map .physics-chapter__button[aria-expanded=true]{background:linear-gradient(100deg,#1c2540,#151c30)}.learning-map .physics-chapter__button:focus-visible{outline-offset:-5px;outline:2px solid #d5c9ff}.learning-map .learning-lesson__article{background:linear-gradient(135deg,#2c294a80,#172440);border-radius:10px;text-decoration:none;transition:background .2s,border-color .2s;box-shadow:inset 3px 0 #bba3f080}.learning-map .learning-lesson__article:hover{background:#292a48;border-color:#c5b3ff}.learning-map .learning-lesson__article span{color:#cfc2f5}.learning-map .physics-chapter__number{color:#d4c8ee;font-variant-numeric:tabular-nums;background:#b79be00d;border:1px solid #bba7ed30;border-radius:9px;place-items:center;width:min(2.25rem,100%);height:2.25rem;display:grid}.learning-map .physics-chapter__toggle{background:#b79be008;border-color:#bba7ed40}.learning-map .physics-chapter,.learning-map .learning-map__legacy-anchor,.learning-map .learning-lesson,.learning-map .learning-lesson__article{scroll-margin-top:calc(var(--ark-header-height) + 20px)}.learning-map__coverage{margin-top:24px}.learning-map .learning-coverage-area{scroll-margin-top:calc(var(--ark-header-height) + 20px)}@media (width<=620px){.topic-intro--mapped .topic-intro__shell{padding:calc(var(--ark-header-height) + 16px) 20px 8px}.topic-intro--mapped .topic-intro__content{padding-top:0}.topic-intro--mapped .topic-intro__description{font-size:1rem}.topic-intro__connections{padding:0 20px 44px}.learning-map{padding-top:10px;padding-bottom:24px}.learning-map__tools{margin-top:22px;padding:18px}.learning-map .physics-part-button{padding:18px}.learning-map .physics-map__part-heading{padding:16px}.learning-map .physics-chapter__button{min-height:76px;padding:14px 16px}}.materials-question-explorer{overflow-wrap:anywhere;background:#0e1931;border:1px solid #a5c1e344;border-radius:14px;margin:28px 0;padding:24px}.materials-question-explorer p{color:#c4d0e9;font-size:1rem;line-height:1.8}.materials-question-explorer h3{margin-top:0}.materials-question-explorer label,.materials-question-explorer legend,.materials-question-explorer dt{color:#e4ddff;font-size:1rem;font-weight:600;display:block}.materials-question-explorer select{color:#f0edff;width:100%;max-width:420px;font:inherit;background:#111e39;border:1px solid #a5c1e355;border-radius:8px;margin:8px 0 20px;padding:12px;display:block}.materials-question-explorer fieldset{border:0;min-width:0;margin:0 0 22px;padding:0}.materials-question-explorer__choices{flex-wrap:wrap;gap:10px;margin-top:10px;display:flex}.materials-question-explorer button{color:#e4e9fb;min-height:44px;font:inherit;cursor:pointer;background:#15223c;border:1px solid #a5c1e355;border-radius:8px;padding:11px 14px}.materials-question-explorer button[aria-pressed=true]{background:#342857;border-color:#c2afff}.materials-question-explorer__context{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:0 0 22px;display:grid}.materials-question-explorer__context div{border:1px solid #a5c1e322;border-radius:8px;padding:16px}.materials-question-explorer dd{color:#c4d0e9;margin:8px 0 0;font-size:1rem;line-height:1.7}.materials-question-explorer h4{color:#e4ddff;font-size:1rem;line-height:1.5}.materials-question-explorer__result{background:#a891ff12;border-left:3px solid #bda6ff;padding:16px}.materials-question-explorer .materials-question-explorer__note{font-size:.875rem}.materials-question-explorer select:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}@media (width<=620px){.materials-question-explorer{padding:18px}.materials-question-explorer__context{grid-template-columns:minmax(0,1fr)}}.scientific-notation-explorer__equation{overflow-wrap:anywhere;line-height:1.8}.scientific-notation-explorer__powers button{min-width:3.4rem}.scientific-notation-explorer__table-wrap{max-width:100%;margin-top:1.25rem;overflow-x:auto}.scientific-notation-explorer__table{border-collapse:collapse;width:100%;font-size:.92rem}.scientific-notation-explorer__table caption{text-align:left;padding-bottom:.65rem;font-weight:700}.scientific-notation-explorer__table th,.scientific-notation-explorer__table td{text-align:left;vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:.7rem .8rem}.scientific-notation-explorer__table .is-normalized{background:#a38be329}.scientific-notation-explorer__table .is-normalized th,.scientific-notation-explorer__table .is-normalized td{font-weight:700}@media (width<=560px){.scientific-notation-explorer__table{font-size:.84rem}.scientific-notation-explorer__table th,.scientific-notation-explorer__table td{padding:.6rem .4rem}.scientific-notation-explorer__powers button{min-width:3rem}}.scale-similarity-explorer__equation,.scale-similarity-explorer__result{overflow-wrap:anywhere}.scale-similarity-explorer__panels{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.scale-similarity-explorer__panel{min-width:0}.scale-similarity-explorer__panel>p{min-height:3.4em;margin-bottom:8px}.scale-similarity-explorer__rectangle-svg{width:100%;height:auto;display:block}.scale-similarity-explorer__map-svg{width:100%;max-width:560px;height:auto;margin:0 auto;display:block}.scale-similarity-explorer__dimension{paint-order:stroke;stroke:#0d192c;stroke-width:4px;stroke-linejoin:round}.scale-similarity-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.scale-similarity-explorer__table{border-collapse:collapse;text-align:left;width:100%}.scale-similarity-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.scale-similarity-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.scale-similarity-explorer__table th{font-size:.875rem;line-height:1.6}.scale-similarity-explorer__table .is-selected{background:#a38be329}@media (width<=680px){.scale-similarity-explorer__panels{grid-template-columns:minmax(0,1fr)}.scale-similarity-explorer__panel>p{min-height:0}}.area-volume-explorer__equation,.area-volume-explorer__result{overflow-wrap:anywhere}.area-volume-explorer__svg{width:100%;max-width:600px;height:auto;margin:0 auto;display:block}.area-volume-explorer__dimension{paint-order:stroke;stroke:#0d192c;stroke-width:4px;stroke-linejoin:round}.area-volume-explorer__dimensions{color:#d4def1;flex-wrap:wrap;gap:12px 24px;display:flex}.area-volume-explorer__dimensions>div{min-width:110px}.area-volume-explorer__dimensions dt{font-size:.875rem;line-height:1.6}.area-volume-explorer__dimensions dd{margin:4px 0 0;font-weight:700}.area-volume-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.area-volume-explorer__table{border-collapse:collapse;text-align:left;width:100%}.area-volume-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.area-volume-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.area-volume-explorer__table th{font-size:.875rem;line-height:1.6}.measurement-estimates-explorer__equation,.measurement-estimates-explorer__result{overflow-wrap:anywhere}.measurement-estimates-explorer__diagram{max-width:100%;overflow-x:auto}.measurement-estimates-explorer__diagram:focus-visible{outline-offset:4px;outline:3px solid #b6d8ff}.measurement-estimates-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.measurement-estimates-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.measurement-estimates-explorer__table{border-collapse:collapse;text-align:left;width:100%}.measurement-estimates-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.measurement-estimates-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.measurement-estimates-explorer__table th{font-size:.875rem;line-height:1.6}.measurement-estimates-explorer__table .is-selected{background:#a38be329}.reasonableness-explorer__equation,.reasonableness-explorer__result{overflow-wrap:anywhere}.reasonableness-explorer__givens{color:#d4def1;flex-wrap:wrap;gap:12px 24px;display:flex}.reasonableness-explorer__givens dt{font-size:.875rem;line-height:1.6}.reasonableness-explorer__givens dd{margin:4px 0 0;font-weight:700}.reasonableness-explorer__diagram{max-width:100%;overflow-x:auto}.reasonableness-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.reasonableness-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.reasonableness-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.reasonableness-explorer__table{border-collapse:collapse;text-align:left;width:100%}.reasonableness-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.reasonableness-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.reasonableness-explorer__table th{font-size:.875rem;line-height:1.6}.reasonableness-explorer__table .is-selected{background:#a38be329}.variables-substitution-explorer__equation,.variables-substitution-explorer__result{overflow-wrap:anywhere}.variables-substitution-explorer__diagram{max-width:100%;overflow-x:auto}.variables-substitution-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.variables-substitution-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.variables-substitution-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.variables-substitution-explorer__table{border-collapse:collapse;text-align:left;width:100%}.variables-substitution-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.variables-substitution-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.variables-substitution-explorer__table th{font-size:.875rem;line-height:1.6}.variables-substitution-explorer__table .is-selected{background:#a38be329}.direction-tabs button{min-height:78px}.direction-tabs button .direction-tab__number{color:var(--tab-accent);font-size:.75rem}.direction-tabs button .direction-tab__label{color:inherit;letter-spacing:0;font-size:1rem}.direction-tab__label small{color:var(--tab-accent);margin-top:4px;font-size:.75rem;font-weight:400;line-height:1.4;display:block}.direction-tabs button:hover,.direction-tabs button[aria-selected=true]{background:linear-gradient(90deg, color-mix(in srgb, var(--tab-accent) 14%, transparent), transparent);box-shadow:inset 2px 0 var(--tab-accent)}.topic-domain-shortcuts a{border-color:color-mix(in srgb, var(--shortcut-accent,#b1b1ff) 45%, transparent)}.topic-domain-shortcuts a span{color:var(--shortcut-accent,#b1b1ff)}.topic-domain__identity{color:var(--catalogue-accent);font-size:.8125rem;line-height:1.5}.direction-intro h1{overflow-wrap:anywhere;font-size:clamp(2.5rem,5.5vw,5rem);line-height:1.12}.direction-subject-family+.direction-subject-family{margin-top:48px}.direction-subject-family>h2,.direction-legacy-homes>h2{color:#e8edff;margin:0 0 24px;font-size:clamp(1.4rem,2.4vw,2rem);font-weight:500;line-height:1.35}.direction-legacy-homes{margin-bottom:48px}@media (width<=620px){.direction-tabs button{min-height:76px}}.direction-panel__copy{min-width:0}.direction-panel h2{overflow-wrap:anywhere}.directions-heading__browse{--world-accent:#b1b1ff;margin-top:18px}.topics-catalogue-page>.ark-breadcrumbs{width:min(100% - 64px,1440px);margin:0 auto;padding-top:118px}.topics-catalogue-page>.ark-breadcrumbs ol{margin-bottom:0}.topics-catalogue-page .topic-browser{padding-top:28px}@media (width<=620px){.topics-catalogue-page>.ark-breadcrumbs{width:calc(100% - 40px);padding-top:104px}.topics-catalogue-page .topic-browser{padding-top:20px}.ark-breadcrumbs li{min-width:0}.ark-breadcrumbs a,.ark-breadcrumbs [aria-current=page]{overflow-wrap:anywhere}}#topic-filters{scroll-margin-top:calc(var(--ark-header-height) + 20px)}.one-step-equations-explorer__equation,.one-step-equations-explorer__result{overflow-wrap:anywhere}.one-step-equations-explorer__diagram{max-width:100%;overflow-x:auto}.one-step-equations-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.one-step-equations-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.one-step-equations-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.one-step-equations-explorer__table{border-collapse:collapse;text-align:left;width:100%}.one-step-equations-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.one-step-equations-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.one-step-equations-explorer__table th{font-size:.875rem;line-height:1.6}.one-step-equations-explorer__table .is-selected{background:#a38be329}.formula-relationships-explorer__equation,.formula-relationships-explorer__result{overflow-wrap:anywhere}.formula-relationships-explorer__diagram{max-width:100%;overflow-x:auto}.formula-relationships-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.formula-relationships-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.formula-relationships-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.formula-relationships-explorer__table{border-collapse:collapse;text-align:left;width:100%}.formula-relationships-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.formula-relationships-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.formula-relationships-explorer__table th{font-size:.875rem;line-height:1.6}.formula-relationships-explorer__table .is-recovered{background:#a38be329}.coordinate-points-explorer__equation,.coordinate-points-explorer__result{overflow-wrap:anywhere}.coordinate-points-explorer__diagram{max-width:100%;overflow-x:auto}.coordinate-points-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.coordinate-points-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.coordinate-points-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.coordinate-points-explorer__table{border-collapse:collapse;text-align:left;width:100%}.coordinate-points-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.coordinate-points-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.coordinate-points-explorer__table th{font-size:.875rem;line-height:1.6}.coordinate-points-explorer__table .is-selected{background:#a38be329}.line-slope-explorer__equation,.line-slope-explorer__result{overflow-wrap:anywhere}.line-slope-explorer__diagram{max-width:100%;overflow-x:auto}.line-slope-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.line-slope-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.line-slope-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.line-slope-explorer__table{border-collapse:collapse;text-align:left;width:100%}.line-slope-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.line-slope-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.line-slope-explorer__table th{font-size:.875rem;line-height:1.6}.foundation-lesson,.foundations-page{--ark-graph-background:#0f172a;--ark-graph-panel:#182337;--ark-graph-border:#475569;--ark-graph-grid:#475569;--ark-graph-axis:#cbd5e1;--ark-graph-text:#f8fafc;--ark-graph-blue:#38bdf8;--ark-graph-violet:#c4b5fd;--ark-graph-orange:#fdba74;--ark-graph-green:#6ee7b7;--ark-graph-red:#fda4af;--ark-graph-pink:#f0abfc;--ark-graph-blue-panel:#173447;--ark-graph-violet-panel:#302b4e;--ark-graph-amber-panel:#3b2e1c;--ark-graph-red-panel:#3b2534}.foundation-lesson :is(svg[role=img],svg[class*=__svg],svg[data-ark-graph-theme=legacy]){border-radius:.75rem;background:var(--ark-graph-background)!important;color:var(--ark-graph-text)!important}.foundation-lesson svg[data-ark-graph-theme=legacy]{fill:var(--ark-graph-text)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=white i],[fill=\#fff i],[fill=\#ffffff i]){fill:var(--ark-graph-background)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#f8fafc i],[fill=\#f1f5f9 i],[fill=\#eef1f4 i]){fill:var(--ark-graph-panel)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#e0f2fe i],[fill=\#dbeafe i],[fill=\#eff6ff i]){fill:var(--ark-graph-blue-panel)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#ede9fe i],[fill=\#ddd6fe i],[fill=\#f5f3ff i]){fill:var(--ark-graph-violet-panel)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#ffedd5 i],[fill=\#fef3c7 i]){fill:var(--ark-graph-amber-panel)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#172554 i],[fill=\#111827 i],[fill=\#172d3d i],[fill=\#0f172a i],[fill=\#142b3c i],[fill=\#172f40 i],[fill=\#243246 i],[fill=\#183044 i],[fill=\#172033 i],[fill=\#273644 i],[fill=\#17202a i],[fill=\#273746 i],[fill=\#243047 i]){fill:var(--ark-graph-text)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#172554 i],[stroke=\#111827 i],[stroke=\#172d3d i],[stroke=\#0f172a i],[stroke=\#142b3c i],[stroke=\#172f40 i],[stroke=\#243246 i],[stroke=\#183044 i],[stroke=\#172033 i],[stroke=\#273644 i],[stroke=\#17202a i],[stroke=\#273746 i],[stroke=\#243047 i]){stroke:var(--ark-graph-axis)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#15608f i],[fill=\#24668f i],[fill=\#315a78 i],[fill=\#1d4ed8 i],[fill=\#267491 i],[fill=\#0369a1 i],[fill=\#12629a i],[fill=\#12638c i],[fill=\#075e8a i],[fill=\#176b9b i],[fill=\#155e75 i],[fill=\#2563eb i]){fill:var(--ark-graph-blue)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#15608f i],[stroke=\#24668f i],[stroke=\#315a78 i],[stroke=\#1d4ed8 i],[stroke=\#267491 i],[stroke=\#0369a1 i],[stroke=\#12629a i],[stroke=\#12638c i],[stroke=\#075e8a i],[stroke=\#176b9b i],[stroke=\#155e75 i],[stroke=\#2563eb i]){stroke:var(--ark-graph-blue)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#804092 i],[fill=\#604b91 i],[fill=\#51416c i],[fill=\#6d28d9 i],[fill=\#7e22ce i],[fill=\#8051a4 i],[fill=\#74459a i],[fill=\#7c3f97 i],[fill=\#623996 i],[fill=\#7b489e i],[fill=\#6b21a8 i]){fill:var(--ark-graph-violet)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#804092 i],[stroke=\#604b91 i],[stroke=\#51416c i],[stroke=\#6d28d9 i],[stroke=\#7e22ce i],[stroke=\#8051a4 i],[stroke=\#74459a i],[stroke=\#7c3f97 i],[stroke=\#623996 i],[stroke=\#7b489e i],[stroke=\#6b21a8 i]){stroke:var(--ark-graph-violet)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#ab682d i],[fill=\#a05b06 i],[fill=\#a6502b i],[fill=\#b45309 i],[fill=\#985029 i],[fill=\#9a3412 i],[fill=\#a85a00 i],[fill=\#a24612 i],[fill=\#9d5716 i],[fill=\#a33d12 i]){fill:var(--ark-graph-orange)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#ab682d i],[stroke=\#a05b06 i],[stroke=\#a6502b i],[stroke=\#b45309 i],[stroke=\#985029 i],[stroke=\#9a3412 i],[stroke=\#a85a00 i],[stroke=\#a24612 i],[stroke=\#9d5716 i],[stroke=\#a33d12 i]){stroke:var(--ark-graph-orange)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#15803d i],[fill=\#237852 i],[fill=\#047857 i],[fill=\#245743 i]){fill:var(--ark-graph-green)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#15803d i],[stroke=\#237852 i],[stroke=\#047857 i],[stroke=\#245743 i]){stroke:var(--ark-graph-green)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#be123c i],[fill=\#b91c1c i]){fill:var(--ark-graph-red)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#be123c i],[stroke=\#b91c1c i]){stroke:var(--ark-graph-red)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [fill=\#794e70 i]{fill:var(--ark-graph-pink)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [stroke=\#794e70 i]{stroke:var(--ark-graph-pink)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#6b7280 i],[stroke=\#d1d5db i],[stroke=\#d7e2e8 i],[stroke=\#e5ebef i],[stroke=\#d8e0e7 i],[stroke=\#e5eaf0 i],[stroke=\#e2e8f0 i],[stroke=\#dbe3ef i],[stroke=\#d9e2e8 i],[stroke=\#e3e8ef i],[stroke=\#c8d5df i],[stroke=\#dbe4eb i],[stroke=\#dce3ec i],[stroke=\#e3e8ec i]){stroke:var(--ark-graph-grid)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#a8b6c3 i],[stroke=\#576b77 i],[stroke=\#6b7f8b i],[stroke=\#96a8b4 i],[stroke=\#cbd5e1 i],[stroke=\#64748b i],[stroke=\#94a3b8 i],[stroke=\#475569 i],[stroke=\#7f939f i],[stroke=\#59727f i],[stroke=\#8594a8 i],[stroke=\#516278 i],[stroke=\#56657b i],[stroke=\#c6d0d8 i],[stroke=\#51606f i],[stroke=\#334155 i]){stroke:var(--ark-graph-axis)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=white i],[stroke=\#fff i],[stroke=\#ffffff i]){stroke:var(--ark-graph-background)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [data-hole]{fill:var(--ark-graph-background)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#334155 i],[fill=\#475569 i],[fill=\#64748b i]){fill:var(--ark-graph-text)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [fill=\#fff1f2 i]{fill:var(--ark-graph-red-panel)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [fill=\#0f766e i]{fill:var(--ark-graph-green)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [stroke=\#0f766e i]{stroke:var(--ark-graph-green)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [fill=\#7c3aed i]{fill:var(--ark-graph-violet)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] [stroke=\#7c3aed i]{stroke:var(--ark-graph-violet)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([fill=\#c2410c i],[fill=\#92400e i],[fill=\#fbbf24 i]){fill:var(--ark-graph-orange)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is([stroke=\#c2410c i],[stroke=\#92400e i],[stroke=\#fbbf24 i]){stroke:var(--ark-graph-orange)!important}.foundation-lesson svg[data-ark-graph-theme=legacy] :is(text,tspan):is([fill=\#334155 i],[fill=\#475569 i],[fill=\#64748b i],[fill=\#576b77 i],[fill=\#516278 i],[fill=\#6b7280 i]){fill:var(--ark-graph-text)!important}.chemistry-lesson .chemistry-visual{border:1px solid var(--ark-graph-border);background:var(--ark-graph-background);min-width:0;color:var(--ark-graph-text);border-radius:12px;margin:1.75rem 0;padding:1.25rem}.chemistry-visual figcaption{margin-bottom:1rem;font-size:1.1rem;font-weight:650}.chemistry-visual__scroll{overscroll-behavior-inline:contain;max-width:100%;overflow-x:auto}.chemistry-visual table{border-collapse:collapse;width:100%;min-width:620px;font-size:.92rem;line-height:1.55}.chemistry-visual :is(th,td){border:1px solid var(--ark-graph-border);text-align:left;vertical-align:top;padding:.8rem}.chemistry-visual thead{background:var(--ark-graph-panel)}.chemistry-visual tbody th{font-weight:500}.chemistry-visual__caption,.chemistry-visual__equivalent{font-size:.9rem;line-height:1.6}.chemistry-visual__scroll svg{max-width:none;margin:auto;font-family:inherit;display:block}.chemistry-visual svg text{fill:var(--ark-graph-text);font-size:16px}.chemistry-visual__axis{fill:none;stroke:var(--ark-graph-axis);stroke-width:2px}.chemistry-visual__grid{stroke:var(--ark-graph-grid);stroke-width:1px}.chemistry-visual__panel{fill:var(--ark-graph-panel);stroke:var(--ark-graph-border);stroke-width:1.5px}.chemistry-visual__connector{fill:none;stroke:var(--ark-graph-green);stroke-width:2px}.chemistry-visual__starting-bar{fill:var(--ark-graph-green)}.chemistry-visual__gas-bar{fill:var(--ark-graph-orange);stroke:var(--ark-graph-text);stroke-width:2px;stroke-dasharray:4 3}.chemistry-visual__product-bar{fill:var(--ark-graph-violet)}.chemistry-visual svg text.chemistry-visual__bar-number{fill:var(--ark-graph-background);font-size:21px;font-weight:650}.chemistry-visual__reference{stroke:var(--ark-graph-orange);stroke-width:2px;stroke-dasharray:6 4}.chemistry-visual__model{fill:none;stroke:var(--ark-graph-green);stroke-width:2px;stroke-dasharray:5 4}.chemistry-visual__point{fill:var(--ark-graph-green);stroke:var(--ark-graph-text);stroke-width:1px}.chemistry-visual__point--second{fill:var(--ark-graph-violet)}.chemistry-visual__point--third{fill:var(--ark-graph-orange)}.chemistry-visual__point--fourth{fill:var(--ark-graph-blue)}.chemistry-visual__legend{flex-wrap:wrap;gap:.5rem 1.5rem;padding:0;font-size:.9rem;list-style:none;display:flex}.chemistry-visual__key{color:var(--ark-graph-green);margin-right:.5rem}.chemistry-visual__key--second{color:var(--ark-graph-violet)}.chemistry-visual__key--third{color:var(--ark-graph-orange)}.chemistry-visual__key--fourth{color:var(--ark-graph-blue)}.chemistry-visual__controls{flex-wrap:wrap;gap:.6rem;margin:1rem 0;display:flex}.chemistry-visual__controls button{background:var(--ark-graph-panel);color:var(--ark-graph-text);border:1px solid var(--ark-graph-border);cursor:pointer;border-radius:7px;padding:.55rem .8rem}.chemistry-visual__phases{grid-template-columns:repeat(auto-fit,minmax(205px,1fr));gap:1rem;display:grid}.chemistry-visual__phases>div{background:var(--ark-graph-panel);border:1px solid var(--ark-graph-border);border-radius:8px;min-width:0}.chemistry-visual__phases>div[hidden]{display:none}.chemistry-visual__phases h4{text-align:center;margin:.6rem;font-size:1rem}.chemistry-visual__phases svg{width:100%;display:block}.chemistry-visual__bond{fill:none;stroke:var(--ark-graph-text);stroke-width:2px}.chemistry-visual__oxygen{fill:var(--ark-graph-orange);stroke:var(--ark-graph-text);stroke-width:1.5px}.chemistry-visual__hydrogen{fill:var(--ark-graph-green);stroke:var(--ark-graph-text);stroke-width:1.5px}.chemistry-visual__connections{grid-template-columns:1fr auto 1.2fr auto 1fr;align-items:center;gap:.7rem;display:grid}.chemistry-visual__connections ul{margin:0;padding:0;list-style:none}.chemistry-visual__connections li,.chemistry-visual__connections strong,.chemistry-visual__steps li{border:1px solid var(--ark-graph-border);background:var(--ark-graph-panel);border-radius:8px;margin:.4rem 0;padding:.65rem}.chemistry-visual__steps{flex-wrap:wrap;gap:.5rem 1.7rem;padding-left:1.4rem;display:flex}.chemistry-bond-polarity__drawing svg{width:840px;height:565px}.chemistry-bond-polarity__notes{margin:1.1rem 0}.chemistry-bond-polarity table caption{text-align:left;margin:.8rem 0;font-weight:650}.chemistry-bond-polarity svg text{font-size:17px}.chemistry-bond-polarity svg .bond-polarity-heading{font-size:22px}.chemistry-bond-polarity svg .bond-polarity-result-label{font-size:19px}.chemistry-bond-polarity svg .bond-polarity-atom-symbol{fill:var(--ark-graph-background);font-size:20px}.chemistry-bond-polarity svg .bond-polarity-zero-text{font-size:26px}.chemistry-phase-map__drawing svg{width:840px;height:660px}.chemistry-phase-map table caption{text-align:left;margin:.8rem 0;font-weight:650}.chemistry-phase-map svg text{font-size:17px}.chemistry-phase-map svg .phase-map-axis-label{font-size:20px}.chemistry-phase-map svg .phase-map-region-label{font-size:23px}.chemistry-phase-map svg .phase-map-region-detail{font-size:17px}.chemistry-phase-map svg .phase-map-legend-label{font-size:15px}.chemistry-phase-map svg .phase-map-note{font-size:16px}@media (width>=1100px){.chemistry-lesson .chemistry-visual.chemistry-phase-map,.chemistry-lesson .chemistry-visual.chemistry-bond-polarity{margin-inline:-12px;padding:16px}}@media (width<=600px){.chemistry-lesson .chemistry-visual{padding:.85rem}.chemistry-visual__connections{text-align:center;grid-template-columns:1fr}.chemistry-visual__connections>span{transform:rotate(90deg)}.chemistry-visual__phases{grid-template-columns:1fr}.chemistry-visual__scroll svg{margin:0}}.molecular-connectivity .molecule-scroll{max-width:100%;overflow-x:auto}.molecular-connectivity svg{max-width:none;margin:0;display:block}.molecular-connectivity .molecule-bond{stroke:var(--ark-graph-text);stroke-width:3px;stroke-linecap:round}.molecular-connectivity .molecule-label-bg{fill:var(--ark-graph-background)}.molecular-connectivity .molecule-atom{fill:var(--ark-graph-text);font-size:21px}.molecular-connectivity .molecule-heading{fill:var(--ark-graph-text);font-size:18px}.molecular-connectivity .molecule-index{fill:var(--ark-graph-orange);font-size:14px}.molecular-connectivity .molecule-scroll:focus-visible{outline:3px solid var(--ark-graph-orange);outline-offset:4px}.molecular-connectivity table{min-width:650px}.molecular-connectivity caption{text-align:left;padding-bottom:12px;font-size:16px}.electron-pair .electron-pair-scroll{max-width:100%;overflow-x:auto}.electron-pair svg{max-width:none;margin:0;display:block}.electron-pair .electron-species{fill:var(--ark-graph-text);font-size:26px}.electron-pair .electron-note{fill:var(--ark-graph-text);font-size:17px}.electron-pair .electron-bond,.electron-pair .electron-net{fill:none;stroke:var(--ark-graph-text);stroke-width:2.5px}.electron-pair .electron-flow{fill:none;stroke:var(--ark-graph-green);stroke-width:3px}.electron-pair .electron-dot,.electron-pair .electron-pair-head{fill:var(--ark-graph-green)}.electron-pair .electron-net-head{fill:var(--ark-graph-text)}.electron-pair .electron-pair-scroll:focus-visible{outline:3px solid var(--ark-graph-orange);outline-offset:4px}.electron-pair table{min-width:650px}.electron-pair caption{text-align:left;padding-bottom:12px;font-size:16px}.donor-geometry svg{font-family:Segoe UI,system-ui,sans-serif}.donor-geometry svg text{fill:var(--ark-graph-text,#f8fafc);font-size:16px}.donor-geometry .donor-title{font-size:18px;font-weight:600}.donor-geometry .donor-note{font-size:15px}.donor-panel{fill:var(--ark-graph-panel,#182337);stroke:var(--ark-graph-border,#475569);stroke-width:1px}.donor-attachment{fill:none;stroke:var(--ark-graph-axis,#cbd5e1);stroke-width:2px}.donor-A{fill:var(--ark-graph-green,#6ee7b7);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1px}.donor-B{fill:var(--ark-graph-orange,#fdba74);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1px}.donor-N{fill:var(--ark-graph-violet,#c4b5fd);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1px}.donor-metal{fill:var(--ark-graph-background,#0f172a);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1.5px}.donor-metal-label{font-weight:600}.donor-pair{fill:none;stroke-width:3px;stroke-dasharray:5 4}.donor-pair-0{stroke:var(--ark-graph-green,#6ee7b7)}.donor-pair-1{stroke:var(--ark-graph-orange,#fdba74)}.donor-pair-2{stroke:var(--ark-graph-blue,#38bdf8)}.donor-scroll{max-width:100%;overflow-x:auto}.donor-scroll:focus-visible{outline:3px solid var(--ark-graph-orange,#fdba74);outline-offset:4px}.donor-geometry table{min-width:700px}.donor-geometry caption{text-align:left;color:var(--muted,#adc0d0);padding:12px 0}.class-cycle svg{font-family:Segoe UI,system-ui,sans-serif}.class-cycle svg text{fill:var(--ark-graph-text,#f8fafc);font-size:16px}.class-cycle .cycle-formula{font-size:23px;font-weight:600}.class-cycle .cycle-note{font-size:15px}.cycle-node{fill:var(--ark-graph-panel,#182337);stroke-width:2px}.cycle-node-0{stroke:var(--ark-graph-green,#6ee7b7)}.cycle-node-1{stroke:var(--ark-graph-orange,#fdba74)}.cycle-node-2{stroke:var(--ark-graph-violet,#c4b5fd)}.cycle-arrow{fill:none;stroke:var(--ark-graph-axis,#cbd5e1);stroke-width:2.5px}.cycle-arrow-head{fill:var(--ark-graph-axis,#cbd5e1)}.cycle-scroll{max-width:100%;overflow-x:auto}.cycle-scroll:focus-visible{outline:3px solid var(--ark-graph-orange,#fdba74);outline-offset:4px}.class-cycle table{min-width:700px}.class-cycle caption{text-align:left;color:var(--muted,#adc0d0);padding:12px 0}.bio-site svg{font-family:Segoe UI,system-ui,sans-serif}.bio-site svg text{fill:var(--ark-graph-text,#f8fafc);font-size:16px}.bio-site .bio-site-title{font-size:18px;font-weight:600}.bio-site .bio-site-note{font-size:15px}.bio-site-panel{fill:var(--ark-graph-panel,#182337);stroke:var(--ark-graph-border,#475569);stroke-width:1px}.bio-site-contact{fill:none;stroke:var(--ark-graph-axis,#cbd5e1);stroke-width:2px}.bio-site-N{fill:var(--ark-graph-violet,#c4b5fd);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1px}.bio-site-other{fill:var(--ark-graph-orange,#fdba74);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1px}.bio-site-metal{fill:var(--ark-graph-background,#0f172a);stroke:var(--ark-graph-text,#f8fafc);stroke-width:1.5px}.bio-site-metal-label{font-weight:600}.bio-site-scroll{max-width:100%;overflow-x:auto}.bio-site-scroll:focus-visible{outline:3px solid var(--ark-graph-orange,#fdba74);outline-offset:4px}.bio-site table{min-width:700px}.bio-site caption{text-align:left;color:var(--muted,#adc0d0);padding:12px 0}.p114-native-figure{min-width:0;max-width:840px;margin:2rem 0}.p114-native-figure figcaption{font-size:1.22rem;font-weight:700;line-height:1.45}.p114-native-figure h3{margin:1.45rem 0 .65rem;font-size:1.05rem;line-height:1.45}.p114-native-figure p{line-height:1.55}.p114-native-hint{font-size:.88rem}.p114-native-scroll{overscroll-behavior-x:contain;scrollbar-gutter:stable;border-radius:.75rem;max-width:100%;margin:.7rem 0;overflow-x:auto}.p114-native-scroll:focus-visible{outline:3px solid var(--ark-graph-blue);outline-offset:3px}.p114-native-chart{flex:none;min-width:820px;font:14px/1.3 system-ui,sans-serif;display:block}.p114-native-legend{gap:.55rem;margin:.8rem 0 1rem;padding:0;list-style:none;display:grid}.p114-native-legend li{align-items:center;gap:.65rem;line-height:1.4;display:flex}.p114-native-legend svg{flex:none}.p114-native-bar-swatch{border:2px solid var(--p114-series);flex:none;width:56px;height:14px;display:inline-block}.p114-native-bar-swatch--solid{background:var(--p114-series)}.p114-native-bar-swatch--outlined{background:var(--ark-graph-background)}.p114-native-bar-swatch--hatched{background-color:var(--ark-graph-amber-panel);background-image:repeating-linear-gradient(135deg, transparent 0 4px, var(--p114-series) 4px 5.4px, transparent 5.4px 7px)}.p114-native-cases{border-left:3px solid var(--ark-graph-border);padding-left:1rem}.p114-native-cases p,.p114-native-notes p{margin:.55rem 0}.p114-native-table{border-collapse:collapse;color:inherit;table-layout:fixed;font-size:.92rem}.p114-profile-table{width:820px}.p114-force-table{width:1000px}.p114-native-table caption{text-align:left;padding:.4rem 0 .75rem;font-weight:600}.p114-native-table th,.p114-native-table td{border:1px solid var(--ark-graph-border);text-align:right;vertical-align:top;padding:.65rem .7rem}.p114-native-table thead th{background:var(--ark-graph-panel);color:var(--ark-graph-text);text-align:left;font-weight:600}.p114-native-table tbody th{text-align:left;font-weight:500}.p114-native-table td{font-variant-numeric:tabular-nums}@media (prefers-reduced-motion:reduce){.p114-native-scroll{scroll-behavior:auto}}.p115-native{border:1px solid var(--ark-graph-border);background:var(--ark-graph-background);color:var(--ark-graph-text);border-radius:.8rem;min-width:0;margin:1.5rem 0;padding:1rem}.p115-native h3,.p115-native h4{margin:.25rem 0 .75rem;line-height:1.3}.p115-native p{overflow-wrap:anywhere;margin:.6rem 0;line-height:1.55}.p115-native-panel{border:1px solid var(--ark-graph-border);border-radius:.6rem;min-width:0;margin:1.2rem 0;padding:.75rem}.p115-native-scroll{overscroll-behavior-x:contain;scrollbar-gutter:stable;max-width:100%;margin:.5rem 0;padding-bottom:.5rem;overflow-x:auto}.p115-native-scroll:focus-visible{outline:3px solid var(--ark-graph-blue);outline-offset:3px}.p115-native-scroll>svg{width:820px;min-width:820px;height:auto;display:block}.p115-native table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;min-width:700px;font-size:.95rem}.p115-native caption{text-align:left;padding:.5rem 0;font-weight:600;line-height:1.5}.p115-native th,.p115-native td{border:1px solid var(--ark-graph-border);text-align:left;vertical-align:top;padding:.65rem}.p115-native th{background:var(--ark-graph-panel);font-weight:600}.p115-native svg{color:var(--ark-graph-text);font:14px system-ui,sans-serif}.p115-native-legend{margin:.7rem 0;padding:0;list-style:none}.p115-native-legend li{align-items:flex-start;gap:.6rem;margin:.5rem 0;line-height:1.5;display:flex}.p115-native-legend svg{flex:0 0 45px;margin-top:.25rem}.p115-native-notes{border-left:3px solid var(--ark-graph-axis);padding-left:.8rem}@media (width<=600px){.p115-native{padding:.75rem}.p115-native-panel{padding:.5rem}.p115-native h3{font-size:1.2rem}}@media (prefers-reduced-motion:reduce){.p115-native *{scroll-behavior:auto}}.p116-native{border:1px solid var(--ark-graph-border);background:var(--ark-graph-panel);min-width:0;color:var(--ark-graph-text);border-radius:1rem;margin:1.5rem 0;padding:1rem}.p116-native figcaption{font-size:1.2rem;font-weight:700}.p116-native p{max-width:75ch}.p116-native h3{margin-top:1.3rem;font-size:1rem}.p116-scroll{overscroll-behavior-inline:contain;border-radius:.75rem;max-width:100%;overflow-x:auto}.p116-scroll:focus-visible{outline:3px solid var(--ark-graph-blue);outline-offset:3px}.p116-chart{width:820px;min-width:820px;max-width:none;height:auto;font:16px system-ui,sans-serif;display:block}.p116-axis-label{margin:.4rem 0;font-weight:600}.p116-axis-pair{flex-wrap:wrap;gap:.4rem 1.5rem;display:flex}.p116-legend{gap:.5rem;padding:0;list-style:none;display:grid}.p116-legend li{align-items:flex-start;gap:.6rem;display:flex}.p116-legend svg{flex:0 0 64px;margin-top:.12rem}.p116-native table{border-collapse:collapse;background:var(--ark-graph-background);width:100%;min-width:32rem;color:var(--ark-graph-text)}.p116-native caption{text-align:left;padding:.7rem;font-weight:600}.p116-native th,.p116-native td{text-align:right;border:1px solid var(--ark-graph-border);font-variant-numeric:tabular-nums;padding:.65rem .8rem}.p116-native th{white-space:normal}.p116-native tbody th{font-weight:500}.p116-hint{font-size:.9rem}.p116-boundaries{grid-template-columns:repeat(auto-fit,minmax(min(100%,18rem),1fr));gap:.5rem 1rem;display:grid}@media (width<=40rem){.p116-native{margin-inline:0;padding:.8rem}}.p117-native{border:1px solid var(--ark-graph-border);background:var(--ark-graph-panel);min-width:0;color:var(--ark-graph-text);border-radius:1rem;margin:1.5rem 0;padding:1rem}.p117-native figcaption{font-size:1.2rem;font-weight:700}.p117-native h3{margin-top:1.3rem;font-size:1rem}.p117-native p{max-width:75ch}.p117-scroll{overscroll-behavior-inline:contain;border-radius:.75rem;max-width:100%;overflow-x:auto}.p117-scroll:focus-visible{outline:3px solid var(--ark-graph-blue);outline-offset:3px}.p117-chart{width:820px;min-width:820px;max-width:none;height:auto;display:block}.p117-scatter-panels{grid-template-columns:420px 420px;gap:0;width:840px;display:grid}.p117-scatter-panels h3{margin:0;padding:.5rem 1rem}.p117-scatter{width:420px;min-width:420px;max-width:none;height:auto;display:block}.p117-axis-pair{flex-wrap:wrap;gap:.5rem 1.5rem;font-weight:600;display:flex}.p117-legend{gap:.5rem;padding:0;list-style:none;display:grid}.p117-legend li{align-items:flex-start;gap:.6rem;display:flex}.p117-legend svg{flex:0 0 64px;margin-top:.12rem}.p117-native table{border-collapse:collapse;background:var(--ark-graph-background);width:100%;min-width:34rem;color:var(--ark-graph-text)}.p117-native caption{text-align:left;padding:.7rem;font-weight:600}.p117-native th,.p117-native td{text-align:right;border:1px solid var(--ark-graph-border);font-variant-numeric:tabular-nums;padding:.6rem .7rem}.p117-native tbody th{font-weight:500}.p117-energy-table{min-width:44rem!important}.p117-energy-table :is(th,td):last-child{text-align:left;max-width:36rem}.p117-hint{font-size:.9rem}@media (width<=40rem){.p117-native{margin-inline:0;padding:.8rem}}.p118-native{border:1px solid var(--ark-graph-border);background:var(--ark-graph-panel);color:var(--ark-graph-text);border-radius:.85rem;margin:1.75rem 0;padding:1rem}.p118-native figcaption{font-size:1.1rem;font-weight:700}.p118-native h3{margin:1.25rem 0 .5rem;font-size:1rem}.p118-native p{line-height:1.55}.p118-native .p118-hint{color:var(--ark-graph-axis);font-size:.9rem}.p118-scroll{overscroll-behavior-x:contain;border-radius:.65rem;max-width:100%;margin:.75rem 0;overflow-x:auto}.p118-scroll:focus-visible{outline:3px solid var(--ark-graph-blue);outline-offset:4px}.p118-chart{flex:none;width:820px;max-width:none;height:auto;display:block}.p118-legend{gap:.6rem;padding:0;list-style:none;display:grid}.p118-legend li{align-items:center;gap:.65rem;display:flex}.p118-legend svg{flex:none}.p118-native table{border-collapse:collapse;background:var(--ark-graph-background);width:100%;min-width:40rem;color:var(--ark-graph-text);font-variant-numeric:tabular-nums}.p118-native caption{text-align:left;padding:.8rem;font-weight:600}.p118-native :is(th,td){border:1px solid var(--ark-graph-border);text-align:right;padding:.65rem}.p118-native :is(th,td):first-child{text-align:left}.p118-native thead{background:var(--ark-graph-panel)}.p118-axis-pair{flex-wrap:wrap;gap:.25rem 1.5rem;display:flex}.p118-axis-pair p{margin:.25rem 0;font-weight:600}.p118-contact-states{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;display:grid}@media (width<=560px){.p118-native{padding:.75rem}.p118-contact-states{grid-template-columns:1fr}}@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-space-y-reverse:0;--tw-border-style:solid;--tw-font-weight:initial;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--color-sky-400:oklch(74.6% .16 232.661);--color-sky-800:oklch(44.3% .11 240.79);--color-slate-50:oklch(98.4% .003 247.858);--color-slate-200:oklch(92.9% .013 255.508);--color-slate-300:oklch(86.9% .022 252.894);--color-slate-500:oklch(55.4% .046 257.417);--color-slate-700:oklch(37.2% .044 257.287);--color-slate-900:oklch(20.8% .042 265.755);--color-black:#000;--color-white:#fff;--spacing:.25rem;--text-sm:.875rem;--text-sm--line-height:calc(1.25 / .875);--text-base:1rem;--text-base--line-height:calc(1.5 / 1);--text-lg:1.125rem;--text-lg--line-height:calc(1.75 / 1.125);--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--font-weight-black:900;--radius-lg:.5rem;--radius-xl:.75rem;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.collapse{visibility:collapse}.invisible{visibility:hidden}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.relative\!{position:relative!important}.static{position:static}.sticky{position:sticky}.-start{inset-inline-start:calc(var(--spacing) * -1)}.start{inset-inline-start:var(--spacing)}.start\!{inset-inline-start:var(--spacing)!important}.start-1{inset-inline-start:calc(var(--spacing) * 1)}.-end{inset-inline-end:calc(var(--spacing) * -1)}.end{inset-inline-end:var(--spacing)}.top-50{top:calc(var(--spacing) * 50)}.isolate{isolation:isolate}.order-1{order:1}.order-4{order:4}.order-5{order:5}.col-2{grid-column:2}.col-3{grid-column:3}.col-6{grid-column:6}.col-12{grid-column:12}.row-0{grid-row:0}.row-1{grid-row:1}.row-2{grid-row:2}.row-3{grid-row:3}.row-4{grid-row:4}.float-right{float:right}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.m-0{margin:calc(var(--spacing) * 0)}.m-1{margin:calc(var(--spacing) * 1)}.m-2{margin:calc(var(--spacing) * 2)}.m-5{margin:calc(var(--spacing) * 5)}.m-8{margin:calc(var(--spacing) * 8)}.m-12{margin:calc(var(--spacing) * 12)}.m-auto{margin:auto}.mx-0{margin-inline:calc(var(--spacing) * 0)}.mx-2{margin-inline:calc(var(--spacing) * 2)}.mx-auto{margin-inline:auto}.my-2{margin-block:calc(var(--spacing) * 2)}.my-4{margin-block:calc(var(--spacing) * 4)}.my-5{margin-block:calc(var(--spacing) * 5)}.my-7{margin-block:calc(var(--spacing) * 7)}.my-8{margin-block:calc(var(--spacing) * 8)}.mt-1{margin-top:calc(var(--spacing) * 1)}.mt-2{margin-top:calc(var(--spacing) * 2)}.mt-3{margin-top:calc(var(--spacing) * 3)}.mt-4{margin-top:calc(var(--spacing) * 4)}.mt-5{margin-top:calc(var(--spacing) * 5)}.mr-3{margin-right:calc(var(--spacing) * 3)}.mr-auto{margin-right:auto}.mb-1{margin-bottom:calc(var(--spacing) * 1)}.mb-2{margin-bottom:calc(var(--spacing) * 2)}.mb-3{margin-bottom:calc(var(--spacing) * 3)}.mb-4{margin-bottom:calc(var(--spacing) * 4)}.mb-5{margin-bottom:calc(var(--spacing) * 5)}.ml-0{margin-left:calc(var(--spacing) * 0)}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.inline-block{display:inline-block}.inline-flex{display:inline-flex}.list-item{display:list-item}.table{display:table}.table\!{display:table!important}.table-cell{display:table-cell}.size-0{width:calc(var(--spacing) * 0);height:calc(var(--spacing) * 0)}.size-1{width:calc(var(--spacing) * 1);height:calc(var(--spacing) * 1)}.size-2{width:calc(var(--spacing) * 2);height:calc(var(--spacing) * 2)}.size-3{width:calc(var(--spacing) * 3);height:calc(var(--spacing) * 3)}.size-4{width:calc(var(--spacing) * 4);height:calc(var(--spacing) * 4)}.size-5{width:calc(var(--spacing) * 5);height:calc(var(--spacing) * 5)}.size-6{width:calc(var(--spacing) * 6);height:calc(var(--spacing) * 6)}.h-0{height:calc(var(--spacing) * 0)}.h-0\.5{height:calc(var(--spacing) * .5)}.h-10{height:calc(var(--spacing) * 10)}.h-25{height:calc(var(--spacing) * 25)}.h-42{height:calc(var(--spacing) * 42)}.h-72{height:calc(var(--spacing) * 72)}.h-89{height:calc(var(--spacing) * 89)}.h-150{height:calc(var(--spacing) * 150)}.w-0{width:calc(var(--spacing) * 0)}.w-2{width:calc(var(--spacing) * 2)}.w-4{width:calc(var(--spacing) * 4)}.w-6{width:calc(var(--spacing) * 6)}.w-8{width:calc(var(--spacing) * 8)}.w-10{width:calc(var(--spacing) * 10)}.w-100{width:calc(var(--spacing) * 100)}.w-full{width:100%}.max-w-\[560px\]{max-width:560px}.max-w-full{max-width:100%}.min-w-\[520px\]{min-width:520px}.shrink{flex-shrink:1}.grow{flex-grow:1}.border-collapse{border-collapse:collapse}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.list-disc{list-style-type:disc}.columns-1{columns:1}.flex-row{flex-direction:row}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.gap-1{gap:calc(var(--spacing) * 1)}.gap-2{gap:calc(var(--spacing) * 2)}.gap-3{gap:calc(var(--spacing) * 3)}.gap-4{gap:calc(var(--spacing) * 4)}:where(.space-y-1>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 1) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 1) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-2>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 2) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 2) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-3>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 3) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 3) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-4>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 4) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 4) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-6>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 6) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 6) * calc(1 - var(--tw-space-y-reverse)))}.gap-x-4{column-gap:calc(var(--spacing) * 4)}.gap-y-1{row-gap:calc(var(--spacing) * 1)}.gap-y-2{row-gap:calc(var(--spacing) * 2)}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.overflow-auto{overflow:auto}.overflow-x-auto{overflow-x:auto}.rounded{border-radius:.25rem}.rounded-lg{border-radius:var(--radius-lg)}.rounded-xl{border-radius:var(--radius-xl)}.border{border-style:var(--tw-border-style);border-width:1px}.border-0{border-style:var(--tw-border-style);border-width:0}.border-t{border-top-style:var(--tw-border-style);border-top-width:1px}.border-slate-200{border-color:var(--color-slate-200)}.border-slate-300{border-color:var(--color-slate-300)}.border-slate-700{border-color:var(--color-slate-700)}.bg-black{background-color:var(--color-black)}.bg-sky-800{background-color:var(--color-sky-800)}.bg-slate-50\/40{background-color:#f8fafc66}@supports (color:color-mix(in lab, red, red)){.bg-slate-50\/40{background-color:color-mix(in oklab, var(--color-slate-50) 40%, transparent)}}.bg-slate-900{background-color:var(--color-slate-900)}.bg-transparent{background-color:#0000}.p-0{padding:calc(var(--spacing) * 0)}.p-1{padding:calc(var(--spacing) * 1)}.p-2{padding:calc(var(--spacing) * 2)}.p-3{padding:calc(var(--spacing) * 3)}.p-4{padding:calc(var(--spacing) * 4)}.px-0{padding-inline:calc(var(--spacing) * 0)}.px-1{padding-inline:calc(var(--spacing) * 1)}.px-2{padding-inline:calc(var(--spacing) * 2)}.px-3{padding-inline:calc(var(--spacing) * 3)}.px-4{padding-inline:calc(var(--spacing) * 4)}.py-0{padding-block:calc(var(--spacing) * 0)}.py-1{padding-block:calc(var(--spacing) * 1)}.py-2{padding-block:calc(var(--spacing) * 2)}.py-3{padding-block:calc(var(--spacing) * 3)}.pt-1{padding-top:calc(var(--spacing) * 1)}.pt-2{padding-top:calc(var(--spacing) * 2)}.pt-3{padding-top:calc(var(--spacing) * 3)}.pr-1{padding-right:calc(var(--spacing) * 1)}.pr-2{padding-right:calc(var(--spacing) * 2)}.pr-3{padding-right:calc(var(--spacing) * 3)}.pr-6{padding-right:calc(var(--spacing) * 6)}.pb-1{padding-bottom:calc(var(--spacing) * 1)}.pb-2{padding-bottom:calc(var(--spacing) * 2)}.pb-3{padding-bottom:calc(var(--spacing) * 3)}.pb-5{padding-bottom:calc(var(--spacing) * 5)}.pl-0{padding-left:calc(var(--spacing) * 0)}.pl-1{padding-left:calc(var(--spacing) * 1)}.pl-2{padding-left:calc(var(--spacing) * 2)}.pl-3{padding-left:calc(var(--spacing) * 3)}.pl-4{padding-left:calc(var(--spacing) * 4)}.pl-5{padding-left:calc(var(--spacing) * 5)}.text-center{text-align:center}.text-left{text-align:left}.align-baseline{vertical-align:baseline}.align-bottom{vertical-align:bottom}.text-base{font-size:var(--text-base);line-height:var(--tw-leading,var(--text-base--line-height))}.text-lg{font-size:var(--text-lg);line-height:var(--tw-leading,var(--text-lg--line-height))}.text-sm{font-size:var(--text-sm);line-height:var(--tw-leading,var(--text-sm--line-height))}.font-black{--tw-font-weight:var(--font-weight-black);font-weight:var(--font-weight-black)}.font-bold{--tw-font-weight:var(--font-weight-bold);font-weight:var(--font-weight-bold)}.font-medium{--tw-font-weight:var(--font-weight-medium);font-weight:var(--font-weight-medium)}.font-semibold{--tw-font-weight:var(--font-weight-semibold);font-weight:var(--font-weight-semibold)}.text-black{color:var(--color-black)}.text-slate-500{color:var(--color-slate-500)}.text-white{color:var(--color-white)}.capitalize{text-transform:capitalize}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.italic{font-style:italic}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}.underline{text-decoration-line:underline}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.shadow,.shadow\/duplicate{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.grayscale{--tw-grayscale:grayscale(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.invert{--tw-invert:invert(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.block-2{block-size:calc(var(--spacing) * 2)}.focus-visible\:outline:focus-visible{outline-style:var(--tw-outline-style);outline-width:1px}.focus-visible\:outline-2:focus-visible{outline-style:var(--tw-outline-style);outline-width:2px}.focus-visible\:outline-sky-400:focus-visible{outline-color:var(--color-sky-400)}@media (width>=40rem){.sm\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}}}:root{--ink:#141b30;--midnight:#090e21;--violet:#6846d8;--lilac:#c9baff;--paper:#f5f7fc;--white:#fff;--line:#dce1ed}*{box-sizing:border-box}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{background:var(--midnight);color:var(--ink);font-family:var(--font-geist-sans), system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;margin:0;line-height:1.6}button,input{font:inherit}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,[tabindex="0"]:focus-visible{outline-offset:5px;outline:3px solid #a18bff}h1[tabindex="-1"]:focus-visible,h2[tabindex="-1"]:focus-visible,h3[tabindex="-1"]:focus-visible{outline-offset:6px;border-radius:4px;outline:2px solid #c6b3ff}main:focus{outline:none}section[id],[id=main-content]{scroll-margin-top:96px}h1,h2,h3,p{overflow-wrap:break-word}button,a{touch-action:manipulation}.skip-link{color:#27155e;z-index:100;background:#fff;border-radius:8px;padding:12px 20px;font-size:1rem;position:fixed;top:10px;left:20px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}:root{--ark-header-height:76px}.ark-navigation{z-index:80;color:#f2f5ff;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#070c1df2;border-bottom:1px solid #ffffff1c;position:fixed;inset:0 0 auto}.ark-navigation__global{min-height:var(--ark-header-height);justify-content:space-between;align-items:center;gap:24px;padding:12px max(28px,50vw - 660px);display:flex}.ark-navigation__brand,.footer-brand{color:inherit;letter-spacing:.08em;align-items:center;gap:14px;font-size:.875rem;font-weight:650;line-height:1.45;text-decoration:none;display:flex}.ark-navigation__brand{min-width:0}.brand-mark{color:#b6a0ff;flex-shrink:0;width:27px;height:27px;display:inline-block;position:relative;transform:rotate(45deg)}.brand-mark i{border:1px solid;display:block;position:absolute;inset:0}.brand-mark i:nth-child(2){opacity:.7;transform:scale(.66)}.brand-mark i:nth-child(3){background:currentColor;transform:scale(.24)}.ark-navigation__actions{flex-shrink:0;align-items:center;gap:18px;display:flex}.ark-navigation__language{color:#8591af;align-items:center;gap:2px;font-size:.875rem;display:flex}.ark-navigation__language a{color:#bac2d8;border-radius:8px;place-items:center;min-width:44px;min-height:44px;text-decoration:none;display:grid}.ark-navigation__language a.active{color:#fff;background:#ffffff0c}.ark-navigation__language a:hover{background:#ffffff14}.ark-navigation__toggle{color:#eee6ff;cursor:pointer;background:#aa8fff0d;border:1px solid #b79ef64a;border-radius:9px;justify-content:center;align-items:center;gap:12px;min-width:44px;min-height:44px;padding:10px 15px;font-size:.875rem;display:inline-flex}.ark-navigation__toggle:hover,.ark-navigation.is-open .ark-navigation__toggle{background:#aa8fff22;border-color:#ceb7ff80}.ark-navigation__toggle-icon{flex-direction:column;justify-content:center;gap:6px;width:18px;height:20px;display:flex}.ark-navigation__toggle-icon i{background:currentColor;width:18px;height:2px;transition:transform .2s;display:block}.ark-navigation.is-open .ark-navigation__toggle-icon i:first-child{transform:translateY(4px)rotate(45deg)}.ark-navigation.is-open .ark-navigation__toggle-icon i:last-child{transform:translateY(-4px)rotate(-45deg)}.ark-navigation__panel{width:min(640px,100vw - 56px);max-height:calc(100svh - var(--ark-header-height));background:#0b1125;border:1px solid #bca5ed40;border-radius:0 0 14px 14px;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;padding:24px;display:grid;position:absolute;top:100%;right:max(28px,50vw - 660px);overflow:auto;box-shadow:0 18px 48px #02050db3}.ark-navigation__panel[hidden]{display:none}.ark-navigation__panel nav{flex-direction:column;min-width:0;display:flex}.ark-navigation__panel p{color:#baa5fa;margin:0 0 12px;font-size:.875rem}.ark-navigation__panel a{color:#dbe4f8;border-bottom:1px solid #ffffff16;justify-content:space-between;align-items:center;gap:16px;min-height:48px;padding:10px 0;font-size:1rem;line-height:1.5;text-decoration:none;display:flex}.ark-navigation__panel a:hover,.ark-navigation__panel a.active{color:#e0ceff;border-bottom-color:#b69aff80}.ark-navigation__panel a.active{font-weight:650}.ark-navigation__panel a[aria-current=location]{color:#e0ceff;border-bottom-color:#b69aff80;font-weight:650}.ark-navigation__panel a span{color:#c7b7ff}@media (width<=620px){:root{--ark-header-height:72px}.ark-navigation__global{gap:12px;padding:10px 16px}.ark-navigation__brand{letter-spacing:.025em;gap:12px}.ark-navigation__brand>span:last-child{max-width:155px}.ark-navigation__actions{gap:8px}.ark-navigation__panel{border-radius:0;gap:22px;width:100%;padding:20px;right:0}}@media (width<=440px){.ark-navigation__toggle-label{display:none}.ark-navigation__toggle{padding:10px}.ark-navigation__brand>span:last-child{max-width:125px}.ark-navigation__language a{min-width:36px}}@media (width<=370px){.ark-navigation__global{gap:8px;padding-inline:12px}.ark-navigation__brand{gap:10px}.ark-navigation__brand>span:last-child{max-width:115px}.ark-navigation__brand .brand-mark{width:23px;height:23px}.ark-navigation__language a{min-width:32px}.ark-navigation__actions{gap:5px}.ark-navigation__panel{grid-template-columns:1fr}}.hero{isolation:isolate;color:#fff;background:#040919;flex-direction:column;min-height:min(850px,100svh);padding:195px max(28px,50vw - 640px) 0;display:flex;position:relative;overflow:hidden}.hero-atmosphere{z-index:-2;background:#040919 url(/ark-cosmic-horizon.webp) 50% 52%/cover no-repeat;position:absolute;inset:0}.hero:after{content:"";z-index:-1;background:linear-gradient(90deg,#040919ee 0%,#060b1dc7 32%,#090e2133 72%),linear-gradient(#0000 63%,#060b1e 100%);position:absolute;inset:0}.hero-content{width:min(780px,69%);padding-bottom:70px;position:relative}.hero-kicker,.eyebrow{letter-spacing:.17em;text-transform:uppercase;font-size:.75rem;font-weight:600}.hero-kicker{color:#cebcff;align-items:center;gap:14px;display:flex}.hero-kicker span{background:#b8a1ff;width:32px;height:1px}.hero h1{letter-spacing:-.055em;text-wrap:balance;margin:28px 0 25px;font-size:clamp(3.4rem,6.4vw,6.6rem);font-weight:450;line-height:1.03}.hero h1 em{color:#cfbaff;font-family:Georgia,serif;font-weight:400;display:block}.hero-lead{color:#c8d1e5;max-width:590px;margin:0;font-size:1.0625rem;line-height:1.85}.hero-actions{flex-wrap:wrap;align-items:center;gap:28px;margin-top:30px;display:flex}.primary-button,.secondary-button{cursor:pointer;border-radius:10px;justify-content:center;align-items:center;gap:22px;min-height:50px;padding:13px 23px;font-size:.875rem;font-weight:650;line-height:1.5;text-decoration:none;transition:background .2s,border-color .2s;display:inline-flex}.primary-button{color:#fff;background:#6742cf;border:1px solid #9476f5;box-shadow:0 8px 32px #502bbd26}.primary-button:hover{background:#5934bd;border-color:#bc9dff}.text-button{color:#d7dded;cursor:pointer;background:0 0;border:0;align-items:center;gap:14px;min-height:48px;font-size:.875rem;text-decoration:none;display:inline-flex}.text-button:hover{color:#fff}.hero-directions{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0a102980;border-top:1px solid #b6c8ff40;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));margin-top:auto;display:grid}.hero-directions a{color:#dfe7fa;border-right:1px solid #ffffff14;flex-direction:column;align-items:flex-start;gap:9px;min-height:110px;padding:22px 22px 24px;font-size:.9375rem;font-weight:500;line-height:1.4;text-decoration:none;transition:background .2s;display:flex;position:relative}.hero-directions a:first-child{padding-left:22px}.hero-directions a:last-child{border:0}.hero-directions a:hover{color:#fff;background:#d1d9ff0b}.hero-directions__number{color:var(--direction-color);font-size:.75rem;font-family:var(--font-geist-mono), monospace}.hero-directions__arrow{color:var(--direction-color);position:absolute;top:19px;right:20px}.vision-section[id],.themes-section[id],.contribute-section[id]{--home-section-padding:88px;padding:var(--home-section-padding) max(28px, calc((100vw - 1280px)/2));scroll-margin-top:calc(96px - var(--home-section-padding))}.vision-section{background:#fff}.section-label{border-bottom:1px solid var(--line);color:#48536e;letter-spacing:.15em;justify-content:space-between;align-items:center;padding-bottom:18px;font-size:.75rem;font-weight:650;display:flex}.section-label span{font-family:var(--font-geist-mono), monospace;color:#67748d}.section-label.light{color:#c0cbe1;border-color:#ffffff20}.section-label.light span{color:#9eacc8}.vision-grid{grid-template-columns:1.2fr .8fr;gap:8%;padding:52px 0 58px;display:grid}.large-statement{letter-spacing:-.035em;text-wrap:balance;max-width:770px;margin:0;font-size:clamp(2rem,3.5vw,3.7rem);line-height:1.2}.large-statement em,.contribute-intro h2 em{color:#6545bc;font-family:Georgia,serif;font-weight:400}.vision-copy{align-self:center}.vision-copy p{color:#505d76;margin:0 0 20px;font-size:1rem;line-height:1.85}.principles{grid-template-columns:repeat(4,minmax(0,1fr));gap:25px;display:grid}.principles article{border-top:2px solid #e3ddf7;min-height:185px;padding:22px 0 0}.principles span{color:#7353c6;font-size:.75rem;font-family:var(--font-geist-mono), monospace}.principles h3{margin:25px 0 10px;font-size:1.125rem;font-weight:600}.principles p{color:#5b6880;margin:0;font-size:1rem;line-height:1.7}.themes-section{color:#fff;background:radial-gradient(at 90% 0,#21234488,#0000 60%),#0b1125}.themes-heading{grid-template-columns:1.2fr .8fr;align-items:end;gap:40px;padding:46px 0 40px;display:grid}.eyebrow{color:#b5a0fb}.themes-heading h2,.contribute-intro h2{letter-spacing:-.045em;text-wrap:balance;margin:12px 0 0;font-size:clamp(2.5rem,4.6vw,4.6rem);font-weight:450;line-height:1.08}.themes-heading>p{color:#b7c2db;justify-self:end;max-width:385px;margin:0;font-size:1rem;line-height:1.8}.themes-explorer{border:1px solid #ffffff26;border-radius:18px;grid-template-columns:1fr 1.1fr;min-height:470px;display:grid;overflow:hidden}.theme-list{background:#090f2166;border-right:1px solid #ffffff20;flex-direction:column;display:flex}.theme-tab{color:#b6c2df;text-align:left;cursor:pointer;background:0 0;border:0;border-bottom:1px solid #ffffff16;flex:1;grid-template-columns:34px 1fr auto;align-items:center;gap:14px;width:100%;min-height:86px;padding:20px 26px;display:grid}.theme-tab:last-child{border-bottom:0}.theme-tab:hover{color:#fff;background:#ffffff05}.theme-tab.active{color:#fff;background:linear-gradient(90deg,#a188f920,#0000);box-shadow:inset 3px 0 #bb9eff}.theme-tab:focus-visible{outline-offset:-5px}.theme-number{color:#a697cf;font-size:.75rem;font-family:var(--font-geist-mono), monospace}.theme-tab>span:nth-child(2){font-size:1.0625rem}.theme-arrow{color:#c4afff;opacity:0}.theme-tab.active .theme-arrow{opacity:1}.theme-stage{background:radial-gradient(circle at 65% 20%, var(--theme-color), transparent 72%);place-items:center;padding:44px 34px;display:grid;position:relative;overflow:hidden}@supports (color:color-mix(in lab, red, red)){.theme-stage{background:radial-gradient(circle at 65% 20%, color-mix(in srgb, var(--theme-color) 15%, transparent), transparent 72%)}}.stage-orbit{border:1px solid var(--theme-color);width:380px;height:380px;position:absolute;top:-140px;right:-100px}@supports (color:color-mix(in lab, red, red)){.stage-orbit{border:1px solid color-mix(in srgb, var(--theme-color) 24%, transparent)}}.stage-orbit{border-radius:50%;animation:65s linear infinite spin}.stage-orbit:before,.stage-orbit:after{content:"";border:1px solid #ffffff14;border-radius:50%;position:absolute}.stage-orbit:before{inset:17%}.stage-orbit:after{inset:34%}.stage-orbit span{background:var(--theme-color);border-radius:50%;width:6px;height:6px;position:absolute}.stage-orbit span:first-child{top:10%;left:18%}.stage-orbit span:nth-child(2){top:50%;right:-3px}.stage-orbit span:nth-child(3){bottom:15%;left:10%}.stage-content{z-index:2;width:100%;max-width:410px;position:relative}.stage-content>p:first-child{color:var(--theme-color);letter-spacing:.12em;text-transform:uppercase;font-size:.75rem}.stage-content h3{letter-spacing:-.025em;margin:20px 0;font-family:Georgia,serif;font-size:clamp(2rem,3.5vw,3.5rem);font-weight:400;line-height:1.12}.stage-rule{background:var(--theme-color);width:42px;height:1px;margin:23px 0}.stage-description{color:#c0cbe2;font-size:1rem;line-height:1.8}.stage-link{border:1px solid var(--theme-color);align-items:center;gap:25px;min-height:48px;margin-top:24px;padding:11px 18px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.stage-link{border:1px solid color-mix(in srgb, var(--theme-color) 42%, transparent)}}.stage-link{color:#fff;background:#ffffff08;border-radius:9px;font-size:.875rem;text-decoration:none}.stage-link:hover{background:#ffffff10}@keyframes spin{to{transform:rotate(360deg)}}.contribute-section{background:var(--paper)}.contribute-intro{grid-template-columns:1fr 1fr;gap:10px 9%;padding:46px 0 40px;display:grid}.contribute-intro .eyebrow{color:#6947bb;grid-column:1/-1}.contribute-intro>p:last-child{color:#53617a;align-self:end;max-width:490px;font-size:1rem;line-height:1.85}.contribution-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.contribution-grid article{background:#fff;border:1px solid #dbe1ef;border-radius:14px;min-height:240px;padding:28px}.contribution-number{color:#6d4fc1;font-size:.75rem;font-family:var(--font-geist-mono), monospace;display:block}.contribution-grid h3{margin:30px 0 13px;font-size:1.375rem;font-weight:550}.contribution-grid p{color:#54627b;margin:0;font-size:1rem;line-height:1.75}.closing-call{border-top:1px solid var(--line);grid-template-columns:auto 1fr auto;align-items:center;gap:25px;margin-top:42px;padding:30px 0;display:grid}.pulse-mark{border:1px solid #7c60c9;width:32px;height:32px;margin:6px;position:relative;transform:rotate(45deg)}.pulse-mark span{border:1px solid #7c60c9;position:absolute;inset:7px}.pulse-mark span:last-child{background:#7c60c9;inset:12px}.closing-call p{max-width:450px;font-family:Georgia,serif;font-size:1.25rem;line-height:1.55}.closing-actions{flex-wrap:wrap;justify-self:end;gap:12px;display:flex}.secondary-button{color:#382563;background:0 0;border:1px solid #b6a9d2}.secondary-button:hover{background:#eae5f4;border-color:#785abd}.vision-section :focus-visible,.contribute-section :focus-visible{outline-color:#6742af}footer{color:#dce3f5;background:#080d1e;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;padding:32px max(28px,50vw - 660px);display:flex}footer>p{color:#a5b1cb;margin:0;font-size:.875rem}footer>button{color:#c3cde4;cursor:pointer;background:0 0;border:0;min-height:44px;font-size:.875rem}@media (width<=900px){section[id],[id=main-content]{scroll-margin-top:90px}.hero{min-height:780px;padding:140px 28px 0}.hero-content{width:85%;padding-bottom:50px}.hero h1{font-size:clamp(3.2rem,8.3vw,5rem)}.hero-directions a{padding-inline:13px;font-size:.875rem}.hero-directions__arrow{right:12px}.vision-section[id],.themes-section[id],.contribute-section[id]{--home-section-padding:65px;padding:var(--home-section-padding) 28px;scroll-margin-top:calc(90px - var(--home-section-padding))}.vision-grid,.themes-heading,.contribute-intro{grid-template-columns:1fr;gap:26px}.vision-grid{padding:38px 0}.vision-copy{max-width:680px}.principles{grid-template-columns:1fr 1fr}.themes-heading>p{justify-self:start;max-width:580px}.themes-explorer{grid-template-columns:1fr 1fr}.theme-tab{grid-template-columns:26px 1fr auto;gap:9px;padding:18px}.theme-stage{padding:32px 24px}.closing-call{grid-template-columns:auto 1fr}.closing-actions{grid-column:1/-1;justify-self:start}.contribution-grid article{padding:22px}}@media (width<=620px){.hero{min-height:0;padding:123px 22px 0}.hero-atmosphere{opacity:.7;background-position:67%}.hero:after{background:linear-gradient(90deg,#040919e6,#04091975),linear-gradient(#0000 25%,#060b1e)}.hero-content{width:100%;padding-bottom:44px}.hero-kicker{letter-spacing:.09em;font-size:.75rem}.hero h1{margin-block:26px 22px;font-size:clamp(2.75rem,11.7vw,4.2rem);line-height:1.06}.hero-lead{font-size:1rem;line-height:1.8}.hero-actions{gap:14px 20px;margin-top:25px}.hero-directions{-webkit-backdrop-filter:none;backdrop-filter:none;grid-template-columns:1fr}.hero-directions a,.hero-directions a:first-child{border-bottom:1px solid #ffffff1c;border-right:0;grid-template-columns:26px 1fr 20px;align-items:center;gap:12px;min-height:60px;padding:15px 6px;font-size:.9375rem;display:grid}.hero-directions__arrow{position:static}.vision-section[id],.themes-section[id],.contribute-section[id]{--home-section-padding:52px;padding:var(--home-section-padding) 22px}.large-statement{font-size:2.125rem;line-height:1.25}.principles{gap:26px 22px}.principles article{min-height:0}.themes-heading h2,.contribute-intro h2{font-size:2.65rem}.themes-explorer{grid-template-columns:1fr}.theme-list{border-bottom:1px solid #ffffff20;border-right:0}.theme-tab{min-height:65px;padding:17px 20px}.theme-tab>span:nth-child(2){font-size:1rem}.theme-stage{min-height:350px;padding:32px 24px}.stage-content h3{font-size:2.5rem}.contribution-grid{grid-template-columns:1fr}.contribution-grid article{min-height:0;padding:25px}.contribution-grid h3{margin-top:18px}.contribute-intro .eyebrow{grid-column:auto}footer{padding:30px 22px}.footer-brand{font-size:.6875rem}footer>p{order:3;width:100%}}@media (width<=370px){.principles{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.about-page{color:#eef2ff;background:#090e21}.about-page .hero{min-height:0;padding-top:130px}.about-page .hero-content{width:min(800px,100%);padding-bottom:52px}.about-page .hero h1{font-size:clamp(2.8rem,6vw,5rem)}.about-page__motto{color:#d5c3ff;margin:0 0 24px;font-size:1.25rem}.about-page .vision-section,.about-page .contribute-section{background:#0c1228}.about-page .section-label{color:#c0cbe1;border-color:#ffffff24}.about-page .section-label span,.about-page .principles span,.about-page .contribution-number{color:#b7a0f8}.about-page .vision-copy p,.about-page .principles p,.about-page .contribute-intro>p:last-child,.about-page .contribution-grid p{color:#bbc9e4}.about-page .large-statement em,.about-page .contribute-intro h2 em,.about-page .contribute-intro .eyebrow{color:#c4adff}.about-page .principles article,.about-page .closing-call{border-color:#ffffff25}.about-page .contribution-grid article{background:#131a31;border-color:#a3b5df30}.about-page .secondary-button,.install-page .secondary-button{color:#e0d1ff;border-color:#bca6ed60}.about-page .secondary-button:hover,.install-page .secondary-button:hover{background:#b296ee1a}.about-page :is(a,button):focus-visible{outline-color:#ccb5ff}.install-page{color:#eef2ff;background:radial-gradient(at 80% 0,#34275f66,#0000 60%),#090e21;min-height:100svh;padding:140px 24px 72px}.install-page__shell{max-width:1040px;margin:0 auto}.install-page h1{letter-spacing:-.035em;max-width:800px;margin:18px 0 24px;font-size:clamp(2.8rem,6vw,4.8rem);font-weight:450;line-height:1.12}.install-page__intro{color:#c0cee8;max-width:720px;font-size:1.125rem}.install-page__actions{flex-wrap:wrap;gap:14px;margin:28px 0 20px;display:flex}.install-page p[role=status]{color:#b9c7e2;max-width:720px;min-height:26px;font-size:1rem}.install-page__guides{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:40px;display:grid}.install-page__guides section{background:#131a31;border:1px solid #c3adf63b;border-radius:14px;padding:28px}.install-page h2{margin:0 0 20px;font-size:1.5rem;font-weight:550}.install-page ol{color:#c0cee8;margin:0;padding-left:22px}.install-page li{margin-bottom:14px;padding-left:7px;font-size:1rem}.install-page li:last-child{margin-bottom:0}.install-page__online{color:#b9c7e2;margin-top:32px}@media (width<=620px){.about-page .hero{padding-top:115px}.install-page{padding:116px 20px 48px}.install-page__guides{grid-template-columns:1fr}.install-page__guides section{padding:24px}}.stage-content{min-width:0}.stage-content h3,.graph-reading-explorer__equation,.graph-reading-explorer__result{overflow-wrap:anywhere}.graph-reading-explorer__warning{color:#ffd3c8}.graph-reading-explorer__diagram{max-width:100%;overflow-x:auto}.graph-reading-explorer__diagram:focus-visible{outline-offset:4px;outline:2px solid #d5c9ff}.graph-reading-explorer__svg{width:100%;min-width:560px;max-width:720px;height:auto;margin:0 auto;display:block}.graph-reading-explorer__table-wrap{max-width:100%;margin-top:24px;overflow-x:auto}.graph-reading-explorer__table{border-collapse:collapse;text-align:left;width:100%}.graph-reading-explorer__table caption{color:#bccbe7;text-align:left;padding:0 0 12px;line-height:1.6}.graph-reading-explorer__table :is(th,td){vertical-align:top;overflow-wrap:anywhere;border-bottom:1px solid #8daee54d;padding:8px}.graph-reading-explorer__table th{font-size:.875rem;line-height:1.6}.graph-reading-explorer__table .is-selected{background:#a38be329}.lesson-math-expression{font:inherit;font-variant-numeric:tabular-nums;color:inherit;overflow-wrap:anywhere}.linear-equations-figure{margin:1.5rem 0}.linear-equations-figure__plot{max-width:100%;overflow-x:auto}.linear-equations-figure svg{width:100%;min-width:640px;height:auto;display:block}.linear-equations-figure svg text{fill:currentColor;font-size:16px}.linear-equations-figure__left{fill:#60a5fa;stroke:#60a5fa}.linear-equations-figure__right{fill:#c4b5fd;stroke:#c4b5fd}.linear-equations-explorer tr[aria-current=step]{background:#60a5fa1a}.linear-equations-explorer button:disabled{opacity:.55;cursor:not-allowed}.inequalities-figure{margin:1.5rem 0}.inequalities-figure__plot{max-width:100%;overflow-x:auto}.inequalities-figure svg{width:100%;min-width:640px;height:auto;display:block}.inequalities-figure svg text{fill:currentColor;font-size:16px}.inequalities-figure__solutions{stroke:#60a5fa;fill:#60a5fa}.inequalities-figure__open{fill:#172033;stroke-width:2px}.inequalities-figure__closed{fill:#60a5fa;stroke-width:2px}.inequalities-figure__candidate{fill:#c4b5fd;stroke:#c4b5fd}.inequalities-explorer tr[aria-current=true]{background:#a18bff18}.systems-figure{margin:1.5rem 0}.systems-figure__plot{max-width:100%;overflow-x:auto}.systems-figure svg{width:100%;min-width:640px;height:auto;display:block}.systems-figure svg text{fill:currentColor;font-size:16px}.systems-figure__grid{stroke:#a7b0c0;stroke-opacity:.3;stroke-width:1px}.systems-figure__first{stroke:#60a5fa;stroke-width:4px}.systems-figure__second{stroke:#c4b5fd;stroke-width:2px;stroke-dasharray:8 6}.systems-figure__intersection{fill:#fcd34d;stroke:#fcd34d}.systems-figure__candidate{fill:none;stroke:#f8fafc;stroke-width:2px}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}.foundations-page{overflow:clip}.foundations-shell{max-width:1440px;padding:calc(var(--ark-header-height,76px) + 32px) clamp(18px, 4vw, 64px) 48px;margin:0 auto}.foundations-heading{justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px;display:flex}.foundations-heading h1{letter-spacing:-.04em;margin:0 0 8px;font-size:clamp(2rem,3.5vw,3rem);font-weight:650}.foundations-heading p{color:#bdc6dd;margin:0;font-size:1rem}.foundations-coverage{color:#d2c5ff;font:inherit;text-align:right;cursor:pointer;background:#201c35;border:1px solid #544777;border-radius:10px;padding:10px 14px;font-size:.875rem}.foundations-coverage:hover{background:#302844}.foundations-toolbar{border-bottom:1px solid var(--topics-line);flex-wrap:wrap;justify-content:space-between;align-items:end;gap:18px;padding-bottom:20px;display:flex}.foundations-destinations{flex-wrap:wrap;gap:14px 24px;margin:0 0 22px;display:flex}.foundations-destinations a{color:#c4ddff;text-underline-offset:4px;align-items:center;min-height:44px;font-size:.875rem;text-decoration:underline;display:inline-flex}.foundations-tabs{flex-wrap:wrap;gap:4px;display:flex}.foundations-tabs button,.foundations-fields button,.foundations-text-button{color:#bac6de;font:inherit;cursor:pointer;background:0 0;border:0;font-size:.9375rem}.foundations-tabs button{border-radius:10px;min-height:44px;padding:10px 16px}.foundations-tabs button[aria-selected=true]{color:#f7f8ff;background:#253150;box-shadow:inset 0 -2px #a9c9ff}.foundations-tabs button:hover,.foundations-fields button:hover{color:#fff;background:#1a2540}.foundations-search{color:#b8c4de;flex-direction:column;gap:6px;width:min(100%,330px);font-size:.875rem;display:flex}.foundations-search input{color:#f7f8ff;width:100%;min-height:44px;font:inherit;background:#10192e;border:1px solid #35415d;border-radius:10px;padding:10px 13px;font-size:1rem}.foundations-search input::placeholder{color:#a3aec7}.foundations-fields{flex-wrap:wrap;gap:8px;padding:20px 0 4px;display:flex}.foundations-fields button{border:1px solid #0000;border-radius:24px;min-height:40px;padding:8px 13px}.foundations-fields button[aria-pressed=true]{color:#c3e4ff;background:#172943;border-color:#466e96}.foundations-workspace{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;gap:28px;padding-top:20px;display:grid}.foundations-workspace--map,.foundations-workspace--coverage{grid-template-columns:minmax(0,1fr)}.foundations-result-count{color:#acb8d2;margin:0 0 12px;font-size:.875rem}.foundations-concepts{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.foundations-concept{text-align:left;color:#f0f3ff;cursor:pointer;min-height:84px;font:inherit;background:#10192b;border:1px solid #26324b;border-radius:12px;flex-direction:column;justify-content:center;align-items:start;gap:7px;padding:14px 16px;display:flex}.foundations-concept span{color:#a6b5d1;font-size:.8125rem}.foundations-concept strong{overflow-wrap:anywhere;font-size:.9375rem;font-weight:550;line-height:1.45}.foundations-concept:hover{background:#192642;border-color:#617698}.foundations-concept[aria-pressed=true]{background:#172a47;border-color:#8db7ef;box-shadow:inset 3px 0 #a5cbff}.foundations-concept[aria-pressed=true] span{color:#b4d8ff}.foundations-detail{background:linear-gradient(145deg,#15213a,#11192f);border:1px solid #34415e;border-radius:18px;min-width:0;padding:clamp(20px,2.6vw,32px)}.foundations-detail,#foundations-view{scroll-margin-top:92px}.foundations-detail__back{display:none}.foundations-detail__eyebrow{color:#d3d1ff;flex-wrap:wrap;gap:8px;margin-bottom:14px;font-size:.8125rem;display:flex}.foundations-detail__eyebrow span{border:1px solid #485171;border-radius:7px;padding:4px 8px}.foundations-detail h2{letter-spacing:-.025em;overflow-wrap:anywhere;margin:0 0 15px;font-size:clamp(1.5rem,2.3vw,2rem);font-weight:600;line-height:1.2}.foundations-detail__description{color:#d9e1f2;font-size:1rem;line-height:1.75}.foundations-detail__actions{flex-wrap:wrap;align-items:center;gap:16px;margin:22px 0;display:flex}.foundations-page .topics-button{background:#172943;border-color:#4f6789;color:#e5ecfc!important}.foundations-page .topics-button:hover{background:#253d5c;border-color:#91b7e5}.foundations-detail .topics-button{background:#c5dcff;border-color:#c5dcff;min-height:44px;padding:10px 16px;font-size:.9375rem;color:#10203d!important}.foundations-detail .topics-button:hover{background:#e0ecff;border-color:#e0ecff;color:#10203d!important}.foundations-detail__context{border-bottom:1px solid #35415d;padding-bottom:8px}.foundations-detail__context a{color:#c5dcff;text-underline-offset:4px;font-size:.9375rem;line-height:1.6;text-decoration:underline}.foundations-detail__context p{color:#b9c8e4;font-size:.875rem}.foundations-text-button{color:#bfceff;text-underline-offset:4px;text-align:left;min-height:44px;padding:0;text-decoration:underline}.foundations-detail h3{color:#eff3ff;margin:20px 0 10px;font-size:1.0625rem;font-weight:600}.foundations-detail p,.foundations-detail li{font-size:1rem;line-height:1.75}.foundations-detail ul,.foundations-detail ol{margin:10px 0;padding-left:21px}.foundations-detail li+li{margin-top:10px}.foundations-detail li{color:#d1daee}.foundations-detail summary{color:#c7d8fb;cursor:pointer;min-height:44px;padding:11px 0;font-size:.9375rem}.foundations-detail details+details{border-top:1px solid #35415d}.foundations-detail__example,.foundations-detail__references{border-top:1px solid #35415d;margin-top:16px}.foundations-detail__references .lesson-references{margin:8px 0 0;padding:0}.foundations-detail__references .lesson-references>h2{display:none}.foundations-detail__references .lesson-references>p{color:#b9c8e4;font-size:.875rem}.foundations-detail__references .foundation-sources{grid-template-columns:minmax(0,1fr);padding:0;display:grid}.foundations-detail__references .foundation-source__attribution{font-size:.8125rem}.foundations-detail__references .foundation-source__title{font-size:.9375rem}.foundations-detail__references .foundation-source__kind,.foundations-detail__references .foundation-source__footer{font-size:.8125rem}.foundations-detail .lesson-math-expression{white-space:normal;overflow-wrap:anywhere;color:#deebff;background:#1d3050;border-radius:4px;padding:.08em .25em;font-size:.95em;display:inline}.foundations-note{color:#bdc8df;margin:0 0 20px;font-size:.9375rem;line-height:1.65}.foundations-path-choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:26px;display:grid}.foundations-path-choices button{text-align:left;color:#edf2ff;cursor:pointer;min-height:92px;font:inherit;background:#111c32;border:1px solid #34415d;border-radius:11px;flex-direction:column;gap:10px;padding:14px;display:flex}.foundations-path-choices button strong{font-size:.9375rem;font-weight:550;line-height:1.45}.foundations-path-choices button span{color:#acbcd7;font-size:.8125rem}.foundations-path-choices button[aria-pressed=true]{background:#242844;border-color:#b7adf4}.foundations-paths>h2{margin:0 0 12px;font-size:1.375rem;font-weight:550}.foundations-path-entry{background:#151e35;border:1px solid #455278;border-radius:12px;margin-bottom:20px;padding:16px 18px}.foundations-path-entry h3{color:#ecedff;margin:0 0 8px;font-size:.9375rem}.foundations-path-entry p{color:#c4d0e7;margin:0;font-size:.9375rem;line-height:1.7}.foundations-path-entry summary{color:#c9dfff;cursor:pointer;min-height:44px;padding:14px 0 6px;font-size:.875rem}.foundations-path-entry details p{font-size:.8125rem}.foundations-preparation{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.foundations-preparation a{color:#d2e5ff;text-underline-offset:3px;border:1px solid #4e678b;border-radius:8px;padding:9px 11px;font-size:.875rem;text-decoration:underline}.foundations-preparation a:hover{background:#253a59}.foundations-coverage-panel>h2{margin:0 0 16px;font-size:1.5rem}.foundations-coverage-panel .foundations-note{max-width:80ch;margin-bottom:10px}.foundations-coverage-basis{color:#a9bad6;max-width:85ch;margin:0 0 24px;font-size:.875rem;line-height:1.65}.foundations-coverage-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.foundations-direction{background:#10192b;border:1px solid #34415e;border-radius:14px;flex-direction:column;align-items:start;gap:12px;min-width:0;padding:22px;display:flex}.foundations-direction h3{color:#edf2ff;margin:0;font-size:1.125rem;line-height:1.45}.foundations-direction p{color:#b9c8df;margin:0;font-size:.875rem}.foundations-direction>a{color:#c3daff;text-underline-offset:4px;margin-top:auto;padding-top:10px;font-size:.875rem;text-decoration:underline}.foundations-direction__status{color:#bac4d8;font-size:.8125rem;line-height:1.45}.foundations-direction__status--started{color:#b8e6d3}.foundations-path-steps{gap:8px;margin:0;padding:0;list-style:none;display:grid}.foundations-path-steps li{position:relative}.foundations-path-steps li+li:before{content:"";background:#7484a4;width:1px;height:8px;position:absolute;bottom:100%;left:29px}.foundations-path-steps button{text-align:left;color:#e5ecfc;cursor:pointer;width:100%;min-height:54px;font:inherit;background:#111c32;border:1px solid #2f3c58;border-radius:10px;align-items:center;gap:14px;padding:10px 14px;display:flex}.foundations-path-steps button>span{color:#c5d9ff;background:#243653;border-radius:50%;flex:0 0 28px;place-items:center;width:28px;height:28px;font-size:.8125rem;display:grid}.foundations-path-steps button>strong{font-size:.9375rem;font-weight:500;line-height:1.45}.foundations-path-steps button[aria-current=step]{background:#262e4d;border-color:#c3b9ff}.foundations-step-actions{justify-content:space-between;gap:12px;margin-top:20px;display:flex}.foundations-step-actions .topics-button{min-height:44px;padding:9px 14px;font-size:.875rem}.foundations-step-actions button:disabled{opacity:.45;cursor:default}.foundations-empty{padding:26px 0}.foundations-empty h2{margin-bottom:20px;font-size:1.125rem}.foundations-footer{border-top:1px solid var(--topics-line);color:#afbdd6;justify-content:space-between;align-items:center;gap:20px;margin-top:36px;padding-top:20px;font-size:.875rem;line-height:1.6;display:flex}.foundations-footer p{margin:0}.foundations-footer a{color:#c1d7ff;text-underline-offset:4px;text-decoration:underline}.foundations-page :is(button,input,summary,[tabindex]):focus-visible{outline-offset:4px;outline:2px solid #c4dfff}.foundations-page .topics-button{white-space:normal;text-align:center}@media (width<=1050px){.foundations-workspace,.foundations-workspace--map{grid-template-columns:minmax(0,1fr)}.foundations-concepts{grid-template-columns:repeat(3,minmax(0,1fr));max-height:min(52vh,520px);margin:-5px;padding:5px;overflow-y:auto}.foundations-detail__back{margin-bottom:16px;display:block}.foundations-map__graph{min-height:330px}.foundations-coverage-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=600px){.foundations-shell{padding:calc(var(--ark-header-height,72px) + 24px) 18px 32px}.foundations-heading{align-items:start;gap:12px}.foundations-heading h1{font-size:2rem}.foundations-coverage{max-width:130px;font-size:.8125rem}.foundations-toolbar{align-items:stretch}.foundations-tabs{gap:2px}.foundations-tabs button{padding:9px 10px;font-size:.875rem}.foundations-search{width:100%}.foundations-concepts{grid-template-columns:repeat(2,minmax(0,1fr))}.foundations-concept{padding:12px}.foundations-detail{padding:22px 18px}.foundations-footer{flex-direction:column;align-items:start;gap:8px}.foundations-map__graph{min-height:0}.foundations-coverage-grid{grid-template-columns:minmax(0,1fr)}}@media (prefers-reduced-motion:reduce){.foundations-page *{scroll-behavior:auto}}.foundations-page--map .foundations-shell{max-width:none;padding-left:clamp(14px,2.5vw,40px);padding-right:clamp(14px,2.5vw,40px);padding-top:calc(var(--ark-header-height,76px) + 22px)}.foundations-page--map .foundations-heading{margin-bottom:14px}.foundations-page--map .foundations-heading h1{margin-bottom:4px;font-size:1.75rem}.foundations-page--map .foundations-heading p{font-size:.875rem}.foundations-page--map .foundations-toolbar{padding-bottom:12px}.foundations-page--map .foundations-workspace{padding-top:14px}.foundations-workspace--map .foundations-detail{width:100%;max-width:860px;margin:0 auto}.foundations-workspace--map .foundations-detail__back{margin-bottom:16px;display:block}.knowledge-map{min-width:0;scroll-margin-top:calc(var(--ark-header-height,76px) + 12px)}.knowledge-map__toolbar,.knowledge-map__intro{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;display:flex}.knowledge-map__fields,.knowledge-map__actions{flex-wrap:wrap;gap:6px;display:flex}.knowledge-map__toolbar button{color:#c6d4eb;cursor:pointer;min-height:40px;font:inherit;background:#101c30;border:1px solid #344562;border-radius:9px;padding:9px 13px;font-size:.875rem}.knowledge-map__fields button[aria-pressed=true]{color:#f3f7ff;background:#263b59;border-color:#93bceb}.knowledge-map__toolbar button:hover{color:#fff;background:#243954}.knowledge-map__intro{margin:16px 0 10px}.knowledge-map__intro h2{color:#eef4ff;margin:0 0 5px;font-size:1.25rem;line-height:1.3}.knowledge-map__intro p{color:#c4d1e8;margin:0;font-size:.875rem;line-height:1.5}.knowledge-map__jump{color:#b9c7df;flex-direction:column;gap:5px;min-width:240px;max-width:330px;font-size:.75rem;display:flex}.knowledge-map__jump select{font:inherit;color:#e5eeff;background:#132039;border:1px solid #455877;border-radius:9px;width:100%;min-height:40px;padding:8px 28px 8px 10px;font-size:.875rem}.knowledge-map__legend{color:#aebed8;flex-wrap:wrap;align-items:center;gap:8px 18px;margin-bottom:12px;font-size:.75rem;line-height:1.5;display:flex}.knowledge-map__legend>:last-child{margin-left:auto}.knowledge-map__available{color:#a5dcc4}.knowledge-map__canvas{background:#0b1528;border:1px solid #384c6c;border-radius:16px;position:relative;overflow:hidden}.knowledge-map__viewport{height:max(400px, calc(100svh - var(--ark-header-height,76px) - 292px));overscroll-behavior:contain;scroll-behavior:auto;scrollbar-width:auto;scrollbar-color:#557396 #122038;touch-action:none;cursor:grab;overflow:auto}.knowledge-map__viewport.is-dragging,.knowledge-map__viewport.is-dragging *{cursor:grabbing;-webkit-user-select:none;user-select:none}.knowledge-map--expanded .knowledge-map__viewport{height:calc(100svh - var(--ark-header-height,76px) - 215px);min-height:430px}.knowledge-map__space{min-width:100%;min-height:100%;position:relative;overflow:clip}.knowledge-map__graph{transform-origin:0 0;background-image:radial-gradient(#50688a35 1px,#0000 1px);background-size:24px 24px;position:absolute;top:0;left:0}.knowledge-map__zoom{z-index:4;background:#101c30f5;border:1px solid #526b8d;border-radius:12px;align-items:center;gap:2px;padding:4px;display:flex;position:absolute;bottom:26px;right:26px;box-shadow:0 4px 16px #0005}.knowledge-map__zoom button{color:#e0edff;cursor:pointer;width:44px;height:44px;font:inherit;background:0 0;border:0;border-radius:8px;font-size:1.375rem}.knowledge-map__zoom button:hover{background:#2a3e5c}.knowledge-map__zoom button:disabled{opacity:.35;cursor:default}.knowledge-map__zoom output{text-align:center;color:#bfd1eb;font-variant-numeric:tabular-nums;min-width:48px;font-size:.75rem}.knowledge-map__layer{color:#8fa3c2;letter-spacing:.03em;pointer-events:none;border-top:1px dashed #33445c;width:100%;padding:11px 24px 0;font-size:.75rem;position:absolute;left:0}.knowledge-map__layer span{background:#0b1528ed;border-radius:6px;padding:3px 8px;display:inline-block;position:sticky;left:88px}.knowledge-map__edges{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.knowledge-map__edges>path{fill:none;stroke:#6483ab;stroke-width:1.5px;opacity:.32}.knowledge-map__edges>path.is-connected{stroke:#b9daff;stroke-width:2.5px;opacity:1}.knowledge-map__edges marker path{fill:none;stroke:#a8c5e9;stroke-width:1.5px}.knowledge-map__node{z-index:1;text-align:left;color:#eaf0fc;cursor:pointer;font:inherit;background:#141f33;border:1px solid #4e607e;border-radius:12px;flex-direction:column;align-items:start;gap:9px;padding:16px 17px;transition:opacity .15s,border-color .15s,background .15s;display:flex;position:absolute}.knowledge-map__node.has-lessons{background:#132e34;border-color:#518779}.knowledge-map__node:hover{opacity:1;background:#243d58;border-color:#bad7ff}.knowledge-map__node[aria-pressed=true]{opacity:1;background:#27435f;border-color:#d4e7ff;box-shadow:0 0 0 3px #86b9ed40}.knowledge-map__node.is-connected{border-color:#a0c8f5}.knowledge-map__node.is-muted{opacity:.45}.knowledge-map__group{color:#adbed9;font-size:.6875rem;line-height:1.35}.knowledge-map__node strong{overflow-wrap:anywhere;font-size:.9375rem;font-weight:550;line-height:1.35}.knowledge-map__status{color:#b6c7e0;margin-top:auto;font-size:.75rem}.has-lessons .knowledge-map__status{color:#a6dfc8}.knowledge-map__orientation{pointer-events:none;color:#c3d5ed;background:#0b1528df;border:1px solid #3a4e6c;border-radius:20px;flex-direction:column;align-items:center;gap:3px;padding:8px;display:flex;position:absolute;top:14px;left:12px;box-shadow:0 3px 10px #0003}.knowledge-map__orientation small{font-size:.6875rem}.knowledge-map__detail{z-index:3;overscroll-behavior:contain;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#16243bef;border:1px solid #6f8aad;border-radius:14px;width:330px;max-height:calc(100% - 100px);padding:24px;position:absolute;top:18px;right:18px;overflow-y:auto;box-shadow:0 10px 32px #0007}.knowledge-map__detail h3{color:#f3f6ff;overflow-wrap:anywhere;margin:10px 18px 12px 0;font-size:1.25rem;line-height:1.4}.knowledge-map__detail p{color:#c2d1e8;margin:10px 0 16px;font-size:.875rem;line-height:1.7}.knowledge-map__detail .knowledge-map__availability{color:#aadbc5;font-size:.75rem}.knowledge-map__detail h4{color:#e5edfb;margin:22px 0 8px;font-size:.8125rem}.knowledge-map__close{min-width:40px;min-height:40px;font:inherit;color:#d8e9ff;cursor:pointer;background:0 0;border:0;border-radius:8px;font-size:1.5rem;position:absolute;top:6px;right:6px}.knowledge-map__close:hover{background:#304664}.knowledge-map__detail .topics-button{min-height:44px;padding:10px 14px;font-size:.875rem}.knowledge-map__connections{flex-direction:column;gap:6px;display:flex}.knowledge-map__connections button{text-align:left;color:#cde4ff;cursor:pointer;font:inherit;background:#15243d;border:1px solid #466287;border-radius:8px;padding:10px;font-size:.8125rem;line-height:1.45}.knowledge-map__connections button:hover{background:#2a3f5b}.knowledge-map__footer{color:#9eafc9;flex-wrap:wrap;justify-content:space-between;gap:8px 30px;margin-top:10px;font-size:.75rem;line-height:1.6;display:flex}.knowledge-map__footer p{max-width:76ch;margin:0}@media (width<=700px){.knowledge-map__toolbar{gap:10px}.knowledge-map__toolbar button{padding:8px 10px;font-size:.8125rem}.knowledge-map__intro{align-items:stretch;gap:12px}.knowledge-map__jump{width:100%;min-width:0;max-width:none}.knowledge-map__legend>:last-child{width:100%;margin-left:0}.knowledge-map__viewport{height:460px}.knowledge-map--expanded .knowledge-map__viewport{height:calc(100svh - var(--ark-header-height,72px) - 390px);min-height:360px}.knowledge-map__detail{width:min(330px,100% - 20px);max-height:calc(100% - 88px);padding:22px;top:10px;right:10px}.knowledge-map__zoom{bottom:22px;right:22px}}@media (prefers-reduced-motion:reduce){.knowledge-map__node{transition:none}}.foundations-workspace--catalogue{grid-template-columns:minmax(0,1fr)}.foundations-collections{flex-wrap:wrap;gap:8px;padding-top:18px;display:flex}.foundations-collections button{color:#c7d7ef;cursor:pointer;min-height:44px;font:inherit;background:#101c30;border:1px solid #3c4d6c;border-radius:9px;padding:9px 14px;font-size:.875rem}.foundations-collections button[aria-pressed=true]{color:#f1f7ff;background:#263b59;border-color:#91b9e8}.foundation-catalogue{min-width:0}.foundation-catalogue__intro h2,.foundation-field-heading h2{color:#eff4ff;margin:0 0 12px;font-size:clamp(1.4rem,2.5vw,1.9rem)}.foundation-catalogue__intro p,.foundation-field-heading p{color:#c0cde3;max-width:92ch;margin:8px 0;font-size:.9375rem;line-height:1.7}.foundation-catalogue .foundation-catalogue__basis,.foundation-catalogue__basis{color:#aebed8;font-size:.875rem;line-height:1.65}.foundation-catalogue__count{color:#b8d2f6;margin:14px 0 22px;font-size:.875rem;line-height:1.65}.foundation-catalogue__totals{flex-wrap:wrap;gap:12px;margin:18px 0;display:flex}.foundation-catalogue__totals>span{color:#adbed9;background:#122039;border:1px solid #3a4c68;border-radius:10px;align-items:baseline;gap:9px;padding:12px 16px;font-size:.8125rem;display:flex}.foundation-catalogue__totals strong{color:#e0ecff;font-variant-numeric:tabular-nums;font-size:1.375rem;font-weight:600}.foundation-catalogue__direction{margin-top:30px}.foundation-catalogue__direction h3{color:#ddd7fa;margin:0 0 14px;font-size:1.125rem;line-height:1.45}.foundation-catalogue__grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.foundation-field-card{text-align:left;color:#eaf1ff;min-width:0;min-height:166px;font:inherit;cursor:pointer;background:#101d31;border:1px solid #344967;border-radius:14px;flex-direction:column;align-items:start;gap:10px;padding:20px;display:flex}.foundation-field-card:hover{background:#1b2e49;border-color:#9cbde8}.foundation-field-card strong{overflow-wrap:anywhere;font-size:1rem;font-weight:600;line-height:1.5}.foundation-field-card__areas{color:#b9c6de;font-size:.75rem}.foundation-field-card__preview{color:#aebed8;font-size:.8125rem;line-height:1.6}.foundation-field-card__status{color:#abd6c5;margin-top:auto;padding-top:4px;font-size:.75rem;line-height:1.6}.foundation-field-heading{margin:18px 0 24px}.foundation-field-heading>span{color:#c4bce7;margin-bottom:10px;font-size:.8125rem;display:block}.foundation-field-heading__actions{flex-wrap:wrap;align-items:center;gap:20px;margin:18px 0;display:flex}.foundation-field-heading__actions a{color:#c5ddff;text-underline-offset:4px;font-size:.9375rem;text-decoration:underline}.foundation-chapter{background:#111e34;border:1px solid #354969;border-radius:13px;margin-bottom:12px;padding:0 22px}.foundation-chapter summary{cursor:pointer;color:#e9f0ff;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 20px;min-height:68px;padding:15px 0;display:flex}.foundation-chapter summary strong{font-size:1rem;line-height:1.5}.foundation-chapter summary strong:before{content:"+ ";color:#aacbfa}.foundation-chapter[open] summary strong:before{content:"− "}.foundation-chapter summary span{color:#aebfda;font-size:.8125rem}.foundation-chapter>p{color:#c4d1e8;margin:0 0 14px;font-size:.9375rem;line-height:1.7}.foundation-lesson-list{margin:0;padding:0;list-style:none}.foundation-lesson-list li{color:#c8d4e9;border-top:1px solid #30415c;justify-content:space-between;align-items:start;gap:14px;padding:12px 0;font-size:.9375rem;line-height:1.6;display:flex}.foundation-lesson-list a{color:#c7e2ff;text-underline-offset:4px;text-decoration:underline}.foundation-lesson-list small{color:#a9b7d0;flex-shrink:0;padding-top:3px;font-size:.75rem}.foundation-lesson-list small.is-available{color:#a3dec3}.foundation-chapter__link{color:#c0daff;text-underline-offset:4px;padding:16px 0;font-size:.875rem;text-decoration:underline;display:inline-block}.foundation-field-context{color:#bfcee4;border-top:1px solid #394b66;margin-top:24px;padding-top:8px}.foundation-field-context summary{cursor:pointer;color:#cbdcff;min-height:44px;padding:12px 0}.foundation-field-context p,.foundation-field-context li{font-size:.875rem;line-height:1.7}.foundation-field-context a{color:#c6ddff;text-underline-offset:4px;text-decoration:underline}.knowledge-map__field-select{color:#b9c7df;flex-direction:column;gap:3px;max-width:260px;font-size:.6875rem;display:flex}.knowledge-map__field-select select{color:#e5eeff;max-width:100%;min-height:40px;font:inherit;background:#132039;border:1px solid #455877;border-radius:9px;padding:8px 28px 8px 10px;font-size:.875rem}.knowledge-map__loading{color:#c7d7ef;min-height:300px;padding:40px 18px}.knowledge-map>.foundation-field-context{border:0;margin:0 0 8px;padding-top:0}.knowledge-map>.foundation-field-context summary{min-height:36px;padding:7px 0;font-size:.8125rem}.knowledge-map--expanded .knowledge-map__viewport{height:calc(100svh - var(--ark-header-height,76px) - 290px)}@media (width<=1050px){.foundation-catalogue__grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=700px){.foundation-catalogue__grid{grid-template-columns:minmax(0,1fr)}.foundation-field-card{min-height:144px;padding:18px}.foundation-chapter{padding:0 16px}.foundation-lesson-list li{flex-direction:column;gap:4px}.foundation-lesson-list small{padding-top:0}.knowledge-map__field-select{width:100%;max-width:none}.knowledge-map__fields{width:100%}.knowledge-map__fields>button{display:none}.knowledge-map__toolbar{gap:8px}.knowledge-map__intro p{display:none}.knowledge-map__intro{gap:8px;margin:10px 0 8px}.knowledge-map__intro h2{font-size:1.125rem}.knowledge-map__legend{gap:6px 10px;font-size:.6875rem}.knowledge-map--expanded .knowledge-map__viewport{height:calc(100svh - var(--ark-header-height,72px) - 475px)}}.repository-heading{max-width:950px;margin-bottom:24px}.repository-kicker{color:#b6caff;letter-spacing:.08em;text-transform:uppercase;margin:0 0 12px;font-size:.8125rem}.repository-heading h1{letter-spacing:-.04em;margin:0 0 14px;font-size:clamp(2.3rem,5vw,3.4rem);font-weight:600;line-height:1.15}.repository-heading>p:not(.repository-kicker){color:#c7d2e6;max-width:76ch;font-size:1.125rem;line-height:1.7}.repository-heading nav{flex-wrap:wrap;gap:24px;margin-top:24px;display:flex}.repository-heading a,.repository-footer a{color:#c3ddff;text-underline-offset:4px;align-items:center;min-height:44px;text-decoration:underline;display:inline-flex}.repository-totals{color:#b6c6df;flex-wrap:wrap;gap:12px 25px;padding:18px 0 24px;font-size:.875rem;display:flex}.repository-totals strong{color:#e1ecff;font-size:1.25rem;font-weight:550}.repository-tabs{border-bottom:1px solid #33445e;flex-wrap:wrap;gap:6px;padding-bottom:20px;display:flex}.repository-tabs button{min-height:44px;font:inherit;color:#c4d1e7;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:9px;padding:9px 16px}.repository-tabs button[aria-current]{color:#f3f7ff;background:#253850;border-color:#5879a6}.repository-purpose,.repository-seed-note{color:#b6c7df;font-size:.9375rem;line-height:1.7}.repository-purpose{max-width:92ch;margin:25px 0}.repository-field-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}.repository-field{text-align:left;color:#edf3ff;cursor:pointer;min-height:178px;font:inherit;background:#111e32;border:1px solid #405573;border-radius:13px;flex-direction:column;gap:12px;padding:23px;display:flex}.repository-field:hover{background:#1b2c45;border-color:#93b7e9}.repository-field strong{font-size:1.125rem;font-weight:550}.repository-field span{color:#b7c6dd;font-size:.875rem;line-height:1.65}.repository-field small{color:#b6d4fa;margin-top:auto;font-size:.75rem}.repository-featured{border-top:1px solid #33445e;margin-top:30px;padding-top:15px}.repository-featured h2{font-size:1.25rem;font-weight:550}.repository-featured button{text-align:left;color:#e7f0ff;width:100%;min-height:64px;font:inherit;cursor:pointer;background:#111f36;border:1px solid #39526f;border-radius:9px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-bottom:9px;padding:15px 18px;display:flex}.repository-featured span{color:#bdd7ef;overflow-wrap:anywhere;font-family:ui-monospace,monospace;font-size:.875rem}.repository-filters{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;padding:24px 0 12px;display:grid}.repository-filters label:first-child,.repository-subject-filter{grid-column:span 2}.repository-filters label{color:#b9c9e2;flex-direction:column;gap:7px;min-width:0;font-size:.8125rem;display:flex}.repository-filters input,.repository-filters select{width:100%;min-width:0;min-height:44px;font:inherit;color:#e6efff;background:#101c31;border:1px solid #526582;border-radius:8px;padding:9px 12px;font-size:.875rem}.repository-filters input::placeholder{color:#aabbd5}.repository-workspace{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:start;gap:28px;display:grid}.repository-entry-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.repository-entry-list a{text-align:left;color:#e6efff;font:inherit;cursor:pointer;background:#101e34;border:1px solid #3c506e;border-radius:10px;flex-direction:column;gap:9px;min-height:139px;padding:16px;text-decoration:none;display:flex}.repository-entry-list a[aria-current=true]{background:#223754;border-color:#9dc3f2;box-shadow:inset 3px 0 #afd0fb}.repository-entry-list a:hover{background:#1b2c45;border-color:#93b7e9}.repository-index{scroll-margin-top:calc(var(--ark-header-height,76px) + 24px)}.repository-filter-tools{min-height:14px;margin-bottom:12px}.repository-pagination,.repository-connections-pages{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin:16px 0;display:flex}.repository-pagination button,.repository-connections-pages button{color:#e7f0ff;min-height:44px;font:inherit;cursor:pointer;background:#172943;border:1px solid #557096;border-radius:8px;padding:9px 12px;font-size:.875rem}.repository-pagination button:disabled,.repository-connections-pages button:disabled{opacity:.45;cursor:default}.repository-pagination span,.repository-connections-pages span{color:#bdcde3;font-size:.8125rem}.repository-permanent-link,.repository-connection-link{color:#c8e2ff;text-underline-offset:3px;overflow-wrap:anywhere}.repository-permanent-link{align-items:center;min-height:44px;margin-bottom:12px;font-size:.8125rem;display:inline-flex}.repository-filter-context{background:#302d46;border:1px solid #756b94;border-radius:9px;padding:12px 14px}.repository-filter-context button{min-height:44px}.repository-connections-controls{flex-wrap:wrap;gap:16px;margin:20px 0;display:flex}.repository-connections-controls label{color:#b9c9e2;flex-direction:column;flex:220px;gap:8px;min-width:0;font-size:.8125rem;display:flex}.repository-connections-controls select{color:#e6efff;width:100%;min-width:0;min-height:44px;font:inherit;background:#101c31;border:1px solid #526582;border-radius:8px;padding:9px 12px}.repository-connections-summary{color:#bdcde3;scroll-margin-top:calc(var(--ark-header-height,76px) + 24px);line-height:1.7}.repository-connection-link{align-items:center;min-height:44px;font-size:.875rem;line-height:1.6;display:inline-flex}.repository-entry-list a:focus-visible,.repository-pagination button:focus-visible,.repository-connections-pages button:focus-visible,.repository-connection-link:focus-visible,.repository-permanent-link:focus-visible{outline-offset:4px;outline:2px solid #b7d5f5}.repository-entry-list span,.repository-entry-list small{color:#b6c9e5;font-size:.75rem;line-height:1.55}.repository-entry-list strong{overflow-wrap:anywhere;font-size:.9375rem;font-weight:550;line-height:1.5}.repository-entry-list small{margin-top:auto}.repository-record,.repository-select-prompt{background:#142139;border:1px solid #48617f;border-radius:15px;min-width:0;padding:clamp(20px,3vw,32px)}.repository-select-prompt p{color:#c1cfe5;line-height:1.8}.repository-record__tags,.repository-record__fields{color:#bdcceb;flex-wrap:wrap;gap:8px;margin-bottom:15px;font-size:.75rem;display:flex}.repository-record__tags span{border:1px solid #557096;border-radius:6px;padding:5px 8px}.repository-review--source-checked{color:#bdebd7;background:#164338}.repository-record h2{overflow-wrap:anywhere;scroll-margin-top:calc(var(--ark-header-height,76px) + 30px);margin:10px 0 15px;font-size:clamp(1.5rem,2.6vw,2rem);font-weight:550;line-height:1.35}.repository-record h3{color:#e9f2ff;margin:24px 0 12px;font-size:1.0625rem;font-weight:550}.repository-record p,.repository-record li,.repository-record dd{color:#cad7ed;font-size:.9375rem;line-height:1.8}.repository-translation{background:#34324b;border:1px solid #756b94;border-radius:8px;padding:10px 12px}.repository-record .repository-seed-note,.repository-review-note{color:#bacce6;font-size:.8125rem}.repository-open-question{background:#302d46;border:1px solid #8c779f;border-radius:9px;padding:12px 14px}.repository-research-context{background:#12273b;border:1px solid #5d748f;border-radius:10px;margin:20px 0;padding:0 16px 16px}.repository-research-context dl>div{margin-top:12px}.repository-research-context dt{color:#d5e8ff;font-size:.875rem;font-weight:550}.repository-research-context dd{overflow-wrap:anywhere;margin:4px 0 0}.repository-research>h3{color:#edf3ff}.repository-collections{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:24px 0;display:grid}.repository-collections button{text-align:left;color:#edf3ff;min-width:0;min-height:142px;font:inherit;cursor:pointer;background:#182a40;border:1px solid #60809e;border-radius:12px;flex-direction:column;gap:10px;padding:20px;display:flex}.repository-collections strong{font-size:1.0625rem;font-weight:550}.repository-collections span,.repository-collections small{color:#bdd0e9;font-size:.8125rem;line-height:1.6}.repository-collection-checklist{border:1px solid #48617f;border-radius:12px;min-width:0;margin:18px 0;padding:0 18px}.repository-collection-checklist>summary{color:#d0e4ff;cursor:pointer;min-height:44px;padding:15px 0;font-size:1rem;line-height:1.65}.repository-collection-checklist .repository-core{border:0;margin:0;padding-top:0}.repository-equation{background:#0f1e34;border:1px solid #557391;border-radius:10px;padding:16px}.repository-equation .repository-equation__value{color:#e0f2ff;overflow-wrap:anywhere;margin:0 0 15px;font-family:ui-monospace,monospace;font-size:1.2rem}.repository-equation dl,.repository-identity{margin:0}.repository-equation dl>div{grid-template-columns:minmax(72px,30%) minmax(0,1fr);gap:14px;display:grid}.repository-equation dt{color:#cadffc;overflow-wrap:anywhere;padding-top:3px}.repository-equation dd{margin:0}.repository-unit{color:#b5d5f5;background:#263e59;border-radius:4px;padding:0 5px;display:inline-block}.repository-record ul{padding-left:22px}.repository-evidence{border-left:2px solid #8bbaba;padding-left:14px}.repository-sources{border-top:1px solid #3d5674;margin-top:24px}.repository-sources summary{color:#c2dcff;cursor:pointer;min-height:44px;padding:13px 0}.repository-sources .lesson-references{margin:0;padding-top:0}.repository-sources .lesson-references>h2{display:none}.repository-sources .foundation-sources{grid-template-columns:minmax(0,1fr)}.repository-sources .foundation-source__attribution,.repository-sources .foundation-source__title{font-size:.875rem}.repository-lessons .topics-button{margin-bottom:8px;font-size:.875rem}.repository-identity{border-top:1px solid #3d5674;margin-top:25px;padding-top:15px}.repository-identity>div{flex-wrap:wrap;gap:6px 12px;margin:5px 0;display:flex}.repository-identity dt,.repository-identity dd{color:#9fb5d5;overflow-wrap:anywhere;margin:0;font-size:.75rem}.repository-connections h4{color:#bac9e0;margin:14px 0 6px;font-size:.8125rem;font-weight:500}.repository-connections button{font:inherit;color:#d1e4ff;cursor:pointer;background:#223752;border:1px solid #5c7394;border-radius:7px;min-height:44px;margin:4px 7px 4px 0;padding:9px 12px;font-size:.8125rem}.repository-connection-view,.repository-status{padding-top:25px}.repository-connection-view>p,.repository-status>p{color:#bdcde3;max-width:90ch;font-size:.9375rem;line-height:1.75}.repository-connection-view ol{margin:25px 0;padding:0;list-style:none}.repository-connection-view li{border-bottom:1px solid #334b68;grid-template-columns:minmax(0,1fr) 28px minmax(0,1fr) minmax(140px,.8fr);align-items:center;gap:12px;padding:12px 0;display:grid}.repository-connection-view button{text-align:left;color:#d0e4ff;min-height:44px;font:inherit;cursor:pointer;background:#152842;border:1px solid #516c8c;border-radius:7px;padding:8px 12px;font-size:.875rem}.repository-connection-view small{color:#b2c5e2;line-height:1.55}.repository-status-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.repository-status-grid article{background:#101f35;border:1px solid #496080;border-radius:12px;padding:20px}.repository-status-grid h3{color:#e4edff;font-size:1.125rem}.repository-status-grid p{color:#b5c9e3;font-size:.875rem}.repository-footer{border-top:1px solid #334b68;flex-wrap:wrap;justify-content:space-between;gap:20px;margin-top:40px;padding-top:20px;display:flex}.repository-footer p{color:#aebfd9;max-width:70ch;margin:0;font-size:.8125rem;line-height:1.7}.repository-record__back{display:none}.repository-page :is(button,input,select,a,summary):focus-visible{outline-offset:4px;outline:2px solid #c5deff}.repository-index{scrollbar-color:#6483a5 #101e34;max-height:max(440px,100svh - 160px);padding:4px 8px 10px 4px;overflow-y:auto}.repository-relation-group{min-width:0;margin-bottom:26px}.repository-relation-group h4{color:#d9e8fd;font-size:1rem}.repository-relation-list{padding:0;list-style:none}.repository-relation-list>li{border-bottom:1px solid #3d5674;min-width:0;padding:12px 0}.repository-connection-view .repository-relation-list>li{display:block}.repository-relation-list>li>div{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.repository-relation-list small{color:#b5cce9;margin:6px 0;font-size:.8125rem;display:block}.repository-relation-list summary{cursor:pointer;color:#bedaff;align-items:center;min-height:44px;font-size:.8125rem;display:flex}.repository-relation-list details a{color:#c8e2ff;overflow-wrap:anywhere}.repository-relation-list details p{font-size:.8125rem}.repository-connection-view .repository-relation-list details li{border:0;padding:5px 0;display:list-item}.repository-core{border-bottom:1px solid #3d5674;margin-bottom:25px;padding:20px 0 30px}.repository-core>p{color:#bdcde3;max-width:90ch;line-height:1.75}.repository-core__count{color:#bfe4d2!important}.repository-core__areas{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.repository-core__areas article{background:#101f35;border:1px solid #496080;border-radius:12px;min-width:0;padding:20px}.repository-core__areas h4{color:#e4edff;margin:0 0 12px;font-size:1rem;font-weight:550}.repository-core__areas p{color:#b5c9e3;font-size:.875rem;line-height:1.7}.repository-core__areas small{color:#bce3d3;font-size:.8125rem}.repository-core__areas ul{padding:0;list-style:none}.repository-core__areas button{text-align:left;color:#c8e2ff;min-height:44px;font:inherit;cursor:pointer;text-underline-offset:3px;background:0 0;border:0;padding:7px 0;font-size:.8125rem;line-height:1.6;text-decoration:underline}@media (width<=900px){.repository-core__areas{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=540px){.repository-core__areas,.repository-collections{grid-template-columns:minmax(0,1fr)}.repository-collection-checklist{padding:0 12px}.repository-equation dl>div{grid-template-columns:minmax(0,1fr);gap:0;margin:12px 0}}@media (width<=1100px){.repository-field-grid,.repository-filters{grid-template-columns:repeat(2,minmax(0,1fr))}}.repository-roadmap{margin:24px 0 40px}.repository-roadmap>p{color:#bdcde3;max-width:95ch;line-height:1.75}.repository-field-assessments{gap:14px;margin-top:24px;display:grid}.repository-field-assessment{background:#101f35;border:1px solid #496080;border-radius:12px;min-width:0}.repository-field-assessment>summary{cursor:pointer;color:#e4edff;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;min-height:70px;padding:16px 22px;display:flex}.repository-field-assessment>summary:before{content:"+";color:#b7d5f5;font-size:1.3rem}.repository-field-assessment[open]>summary:before{content:"−"}.repository-field-assessment>summary strong{flex:1;font-weight:600}.repository-coverage-state{color:#f1d6a5;border:1px solid #796a50;border-radius:6px;padding:4px 9px;font-size:.8125rem;line-height:1.5;display:inline-block}.repository-coverage-state--complete{color:#bfe4d2;border-color:#527d72}.repository-field-assessment__body{min-width:0;padding:0 22px 22px}.repository-field-assessment__body p,.repository-field-assessment__body li{color:#bdcde3;line-height:1.75}.repository-field-assessment__body>details{border-top:1px solid #3d5674;margin-top:16px;padding-top:8px}.repository-field-assessment__body summary{cursor:pointer;color:#d8e9fd;min-height:44px;padding:10px 0;line-height:1.6}.repository-field-assessment__body a{color:#c8e2ff;overflow-wrap:anywhere}.repository-coverage-note{font-size:.875rem;color:#d7c5a7!important}.repository-requirements{padding:0;list-style:none}.repository-requirements>li{border-top:1px solid #3d5674;min-width:0;padding:20px 0}.repository-requirements h4{color:#e4edff;margin:0 0 10px;font-size:1rem;line-height:1.55}.repository-requirements small{color:#b7d5f5}.repository-requirements p,.repository-requirements li{font-size:.875rem}.repository-requirements button{text-align:left;min-height:44px;line-height:1.7}@media (width<=540px){.repository-field-assessment>summary{gap:10px;padding:14px}.repository-field-assessment>summary .repository-coverage-state{width:100%}.repository-field-assessment__body{padding:0 14px 14px}}@media (width<=900px){.repository-workspace{grid-template-columns:minmax(0,1fr)}.repository-workspace--detail .repository-index{display:none}.repository-record__back{display:inline-flex}.repository-record{scroll-margin-top:100px}.repository-status-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=540px){.repository-field-grid,.repository-status-grid,.repository-filters{grid-template-columns:minmax(0,1fr)}.repository-filters label:first-child,.repository-subject-filter{grid-column:auto}.repository-field{min-height:145px;padding:20px}.repository-heading>p:not(.repository-kicker){font-size:1rem}.repository-tabs button{padding:9px 10px;font-size:.875rem}.repository-totals{flex-direction:column;gap:9px}.repository-entry-list{grid-template-columns:minmax(0,1fr)}.repository-entry-list a{min-height:106px}.repository-connection-view li{grid-template-columns:minmax(0,1fr) 20px minmax(0,1fr);gap:7px}.repository-connection-view small{grid-column:1/-1}.repository-equation .repository-equation__value{font-size:1rem}}.repository-reader .repository-heading{max-width:850px;margin-bottom:22px}.repository-reader .repository-kicker{margin-bottom:8px}.repository-reader .repository-heading h1{margin-bottom:12px}.repository-reader .repository-heading>p:not(.repository-kicker){max-width:72ch;margin:0;font-size:1.0625rem;line-height:1.7}.repository-searchbar{background:#111e32;border:1px solid #3d526f;border-radius:14px;grid-template-columns:minmax(0,1fr) minmax(185px,260px) auto;align-items:end;gap:12px;margin-bottom:22px;padding:18px;display:grid}.repository-searchbar label,.repository-subject-select,.repository-extra-filters label{color:#c4d3e9;flex-direction:column;gap:7px;min-width:0;font-size:.8125rem;display:flex}.repository-searchbar input:not([type=hidden]),.repository-searchbar select,.repository-subject-select select,.repository-extra-filters select{color:#edf5ff;width:100%;min-width:0;min-height:48px;font:inherit;background:#0b172a;border:1px solid #526b8c;border-radius:8px;padding:11px 13px;font-size:1rem}.repository-searchbar input::placeholder{color:#a5b9d2;opacity:1}.repository-searchbar__submit{color:#0c213f;min-height:48px;font:inherit;cursor:pointer;background:#bbd7fb;border:1px solid #bad6fa;border-radius:8px;padding:11px 21px;font-size:.9375rem;font-weight:650}.repository-searchbar__submit:hover{background:#d1e5ff}.repository-searchbar__clear{color:#c2dbfc;min-height:32px;font:inherit;text-underline-offset:4px;cursor:pointer;background:0 0;border:0;grid-column:3;justify-self:end;padding:0;font-size:.8125rem;text-decoration:underline}.repository-searchbar__scope{color:#aebfda;grid-area:2/1/auto/3;margin:0;font-size:.8125rem;line-height:1.6}.repository-breadcrumbs{color:#becfe6;flex-wrap:wrap;align-items:center;gap:5px 12px;margin:0 0 22px;font-size:.875rem;line-height:1.6;display:flex}.repository-breadcrumbs a{color:#cce2ff;text-underline-offset:4px;align-items:center;min-height:40px;display:inline-flex}.repository-breadcrumbs [aria-current=page]{color:#edf5ff;text-decoration:none}.repository-breadcrumbs>span[aria-hidden]{color:#69809f}.repository-section-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px;margin:26px 0 19px;display:flex}.repository-section-heading h2{color:#eef4ff;letter-spacing:-.025em;scroll-margin-top:calc(var(--ark-header-height,76px) + 24px);margin:0 0 6px;font-size:1.4rem;font-weight:550;line-height:1.35}.repository-section-heading p{color:#b7c8df;margin:0;font-size:.9375rem;line-height:1.6}.repository-library-count{color:#b9cce6;white-space:nowrap;font-size:.8125rem}.repository-reader .repository-field-grid{gap:13px}.repository-reader .repository-field{background:linear-gradient(150deg,#14223b,#101c30);border-color:#3c526f;gap:9px;min-width:0;min-height:207px;padding:21px;text-decoration:none}.repository-reader .repository-field:hover{background:#1a2c47;border-color:#94b9ef}.repository-reader .repository-field strong{font-size:1.0625rem;line-height:1.4}.repository-reader .repository-field>span:not(.repository-field__mark){line-height:1.6}.repository-reader .repository-field .repository-field__mark{color:#d2e6ff;letter-spacing:-.035em;background:#203653;border:1px solid #526991;border-radius:9px;justify-content:center;align-items:center;width:43px;height:38px;margin-bottom:3px;font:500 1.0625rem ui-monospace,monospace;display:inline-flex}.repository-reader .repository-field[data-knowledge-field=mathematics] .repository-field__mark{color:#e1d8ff;background:#312b50;border-color:#625780;font-size:1.45rem}.repository-reader .repository-field[data-knowledge-field=biology] .repository-field__mark{color:#c3eee1;background:#193c3a;border-color:#4d7873}.repository-reader .repository-field[data-knowledge-field=earth-cosmos] .repository-field__mark{color:#dedfff;background:#2d304e;font-size:1.5rem}.repository-reader .repository-field small,.repository-subject small{color:#b9d6fb;justify-content:space-between;align-items:center;gap:12px;width:100%;margin-top:auto;padding-top:9px;font-size:.75rem;display:flex}.repository-reader .repository-field small span,.repository-subject small span{color:#cae2ff;font-size:1rem}.repository-reading-note{color:#a9bdd8;max-width:85ch;margin:18px 0 0;font-size:.8125rem;line-height:1.7}.repository-browse-all{color:#d5e7ff;background:#182b47;border:1px solid #506b90;border-radius:8px;align-items:center;gap:10px;min-height:44px;padding:10px 14px;font-size:.875rem;text-decoration:none;display:inline-flex}.repository-browse-all:hover{background:#223b5d;border-color:#b4cfff}.repository-subject-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;display:grid}.repository-subject{color:#edf5ff;background:#122039;border:1px solid #3c526f;border-radius:12px;flex-direction:column;gap:10px;min-width:0;min-height:166px;padding:21px;text-decoration:none;display:flex}.repository-subject:hover{background:#1b2e49;border-color:#8eadd6}.repository-subject strong{font-size:1rem;font-weight:550;line-height:1.45}.repository-subject>span{color:#b9cae0;font-size:.875rem;line-height:1.65}.repository-browse-controls{flex-wrap:wrap;align-items:end;gap:16px 24px;margin-bottom:22px;display:flex}.repository-subject-select{flex:280px;max-width:470px}.repository-extra-filters{flex:170px;min-width:0}.repository-extra-filters>summary{color:#c6dcfa;cursor:pointer;width:fit-content;min-height:44px;padding:11px 0;font-size:.875rem}.repository-extra-filters__body{flex-wrap:wrap;align-items:end;gap:12px 20px;padding:10px 0 0;display:flex}.repository-extra-filters__body label{flex:180px;max-width:300px}.repository-extra-filters__body p{color:#b6c9e4;flex-basis:100%;margin:0;font-size:.8125rem;line-height:1.6}.repository-reader .repository-workspace{grid-template-columns:minmax(0,1fr)}.repository-reader .repository-index{min-width:0;max-height:none;padding:0;overflow:visible}.repository-result-heading h2{color:#ecf4ff;margin:0 0 9px;font-size:1.3rem;font-weight:550;line-height:1.4}.repository-result-heading .foundations-result-count{overflow-wrap:anywhere;line-height:1.6}.repository-reader .repository-entry-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.repository-reader .repository-entry-list a{gap:9px;min-width:0;min-height:184px;padding:19px}.repository-reader .repository-entry-list strong{font-size:1rem;line-height:1.5}.repository-reader .repository-entry-list .repository-entry__context{color:#a9bfde;font-size:.71875rem;line-height:1.5}.repository-entry__summary{-webkit-line-clamp:3;color:#bdcde4;overflow-wrap:anywhere;-webkit-box-orient:vertical;margin:0;font-size:.875rem;line-height:1.65;display:-webkit-box;overflow:hidden}.repository-reader .repository-entry-list small{justify-content:space-between;align-items:end;gap:10px;padding-top:5px;font-size:.71875rem;display:flex}.repository-reader .repository-entry-list small span{color:#c6dfff;font-size:1rem}.repository-reader .repository-workspace--detail{grid-template-columns:minmax(260px,.38fr) minmax(0,1fr);gap:24px}.repository-reader .repository-workspace--detail .repository-index{top:calc(var(--ark-header-height,76px) + 20px);max-height:calc(100svh - var(--ark-header-height,76px) - 42px);scrollbar-color:#6483a5 #101e34;padding:3px 9px 12px 3px;position:sticky;overflow-y:auto}.repository-reader .repository-workspace--detail .repository-entry-list{grid-template-columns:minmax(0,1fr)}.repository-reader .repository-workspace--detail .repository-entry-list a{gap:6px;min-height:105px;padding:14px}.repository-workspace--detail .repository-entry__summary{display:none}.repository-reader .repository-workspace--detail .repository-entry-list strong{font-size:.9375rem}.repository-reader .repository-pagination{gap:6px;margin:14px 0}.repository-pagination a{color:#e1edff;background:#172943;border:1px solid #506c93;border-radius:8px;align-items:center;min-height:44px;padding:9px 12px;font-size:.8125rem;text-decoration:none;display:inline-flex}.repository-pagination a:hover{background:#243a57;border-color:#87acd9}.repository-pagination a[aria-disabled=true]{opacity:.4;cursor:default}.repository-reader .repository-record__back{align-items:center;margin-bottom:14px;font-size:.8125rem;display:inline-flex}.repository-reader .repository-record{scroll-margin-top:calc(var(--ark-header-height,76px) + 20px);background:#13213a;padding:clamp(20px,3vw,34px)}.repository-reader .repository-record__tags{gap:7px;margin-bottom:14px;font-size:.6875rem}.repository-reader .repository-record__tags span{border-radius:5px;padding:4px 7px}.repository-reader .repository-record h2{font-size:clamp(1.6rem,2.5vw,2rem);line-height:1.4}.repository-reader .repository-record .repository-summary{color:#e0eafa;font-size:1rem;line-height:1.8}.repository-reader .repository-record .repository-equation+.repository-equation{margin-top:12px}.repository-reader .repository-record .lesson-math-expression{white-space:normal;overflow-wrap:anywhere;color:#e0eeff}.repository-scope{border-left:2px solid #6f97c6;margin:26px 0;padding-left:17px}.repository-scope h3{padding-top:1px}.repository-scope li+li{margin-top:10px}.repository-quantity{background:#0f1d33;border:1px solid #4b688c;border-radius:9px;margin-bottom:10px;padding:15px}.repository-quantity>p{flex-wrap:wrap;align-items:baseline;gap:9px 16px;margin:0 0 5px;display:flex}.repository-quantity__value{overflow-wrap:anywhere;font:1.0625rem/1.6 ui-monospace,monospace}.repository-quantity>small{color:#b7cce7;font-size:.75rem}.repository-related,.repository-entry-details{border-top:1px solid #3d5674;margin-top:12px}.repository-related>summary,.repository-entry-details>summary{color:#c2dcff;cursor:pointer;min-height:44px;padding:13px 0;font-size:.875rem}.repository-reader .repository-identity{border:0;margin:0 0 14px;padding-top:0}.repository-entry-details .repository-permanent-link{margin-bottom:6px}.repository-reader .foundations-empty{background:#122037;border:1px dashed #526b8a;border-radius:12px;min-height:190px;padding:30px 22px}.repository-reader .foundations-empty h3{color:#edf4ff;margin:0 0 10px;font-size:1.2rem}.repository-reader .foundations-empty p{color:#bbcee7;line-height:1.7}.repository-reader .foundations-empty>button{margin-right:20px}.repository-reader :is(input,select,button,a,summary):focus-visible{outline-offset:4px;outline:2px solid #c9e2ff}@media (width<=1100px){.repository-reader .repository-field-grid,.repository-reader .repository-entry-list{grid-template-columns:repeat(2,minmax(0,1fr))}.repository-searchbar{grid-template-columns:minmax(0,1fr) minmax(165px,215px) auto}}@media (width<=900px){.repository-subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.repository-reader .repository-workspace--detail{grid-template-columns:minmax(0,1fr)}.repository-reader .repository-workspace--detail .repository-index{display:none;position:static}}@media (width<=700px){.repository-searchbar{grid-template-columns:minmax(0,1fr) auto;padding:15px}.repository-searchbar__query{grid-column:1/-1}.repository-searchbar__field{grid-column:1}.repository-searchbar__clear{grid-area:3/2}.repository-searchbar__scope{grid-area:3/1}.repository-searchbar__submit{padding:11px 16px}.repository-section-heading{align-items:start}.repository-subject-select{max-width:none}.repository-extra-filters{flex:0 auto}}@media (width<=540px){.repository-reader .repository-field-grid,.repository-subject-grid,.repository-reader .repository-entry-list{grid-template-columns:minmax(0,1fr)}.repository-reader .repository-field{grid-template-columns:43px minmax(0,1fr);align-items:start;gap:6px 13px;min-height:130px;padding:18px;display:grid}.repository-reader .repository-field .repository-field__mark{grid-area:1/1/4}.repository-reader .repository-field>:not(.repository-field__mark){grid-column:2}.repository-reader .repository-field small{padding-top:3px}.repository-subject{min-height:148px;padding:18px}.repository-reader .repository-entry-list a{min-height:160px;padding:17px}.repository-reader .repository-heading>p:not(.repository-kicker){font-size:1rem}.repository-reader .repository-breadcrumbs{gap:3px 8px;font-size:.8125rem}.repository-reader .repository-record{padding:19px}.repository-reader .repository-record p,.repository-reader .repository-record li{font-size:.9375rem}}.repository-international-comparison{border-top:1px solid #3d5674;min-width:0;margin:25px 0 18px;padding-top:21px}.repository-international-heading{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:7px 16px;margin-bottom:9px;display:flex}.repository-international-heading h4{color:#e3edff;margin:0;font-size:1rem;font-weight:550;line-height:1.5}.repository-international-heading time{color:#aabed9;font-size:.75rem}.repository-record .repository-international-comparison .repository-international-finding{color:#c0dccf;margin:0 0 9px;font-size:.8125rem}.repository-record .repository-international-comparison .repository-international-scope{color:#d7e5f8;margin:0 0 9px;line-height:1.7}.repository-record .repository-international-comparison .repository-international-note{color:#b4c7e1;margin:0 0 17px;font-size:.875rem;line-height:1.65}.repository-international-institutions,.repository-international-sources{margin:0;padding:0;list-style:none}.repository-international-institutions>li+li{margin-top:9px}.repository-international-stack,.repository-international-single{background:#101d32;border:1px solid #3d5674;border-radius:9px;min-width:0}.repository-international-stack>summary,.repository-international-review-details>summary,.repository-international-field>summary{color:#d0e2fb;cursor:pointer;overflow-wrap:anywhere;min-height:44px;padding:12px 14px;font-size:.875rem;line-height:1.6}.repository-international-stack>summary::marker{color:#9dbce3}.repository-international-review-details>summary::marker{color:#9dbce3}.repository-international-field>summary::marker{color:#9dbce3}.repository-international-summary-row{vertical-align:top;justify-content:space-between;align-items:baseline;gap:10px 18px;width:calc(100% - 1.2em);display:inline-flex}.repository-international-summary-row>:first-child{min-width:0}.repository-international-count{color:#adc4e2;font-variant-numeric:tabular-nums;flex-shrink:0;font-size:.75rem}.repository-record .repository-international-comparison .repository-international-institution{color:#bdcfe8;overflow-wrap:anywhere;margin:0;padding:13px 14px 2px;font-size:.8125rem;line-height:1.6}.repository-international-sources{padding:0 14px 4px}.repository-international-sources>li{min-width:0;padding:10px 0 12px}.repository-international-sources>li+li{border-top:1px solid #33475f}.repository-international-sources a{color:#d1e5ff;text-underline-offset:3px;overflow-wrap:anywhere;font-size:.875rem;line-height:1.6;display:inline-block}.repository-international-source-context{color:#acbfd9;flex-wrap:wrap;gap:3px 13px;margin-top:4px;font-size:.75rem;line-height:1.6;display:flex}.repository-record .repository-international-comparison .repository-international-source-sections{color:#acbfd9;overflow-wrap:anywhere;margin:5px 0 0;font-size:.75rem;line-height:1.65}.repository-international-review .repository-international-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0;display:grid}.repository-international-metrics>div{background:#101f35;border:1px solid #405a7a;border-radius:10px;min-width:0;padding:17px}.repository-international-metrics dt{color:#b8cce7;font-size:.8125rem;line-height:1.55}.repository-international-metrics dd{color:#e6f0ff;font-variant-numeric:tabular-nums;margin:8px 0 0;font-size:1.625rem;font-weight:550;line-height:1.4}.repository-international-metrics dd>span{color:#aabfdd;font-size:1rem;font-weight:400}.repository-international-metrics small{color:#acbfd9;margin-top:3px;font-size:.6875rem;font-weight:400;line-height:1.55;display:block}.repository-international-review-details{border-top:1px solid #3d5674;border-bottom:1px solid #3d5674;margin:0 0 19px}.repository-international-review-details>summary{padding-inline:0}.repository-international-review-details>div{padding:0 0 12px}.repository-international-review-details p{color:#b8cbe5;overflow-wrap:anywhere;max-width:90ch;margin:0 0 13px;font-size:.875rem;line-height:1.75}.repository-international-contexts{margin:0 0 16px}.repository-international-contexts>div+div{margin-top:10px}.repository-international-contexts dt{color:#d4e2f7;font-size:.8125rem;line-height:1.6}.repository-international-contexts dd{color:#b1c5df;overflow-wrap:anywhere;margin:3px 0 0;font-size:.8125rem;line-height:1.7}.repository-international-fields{border:1px solid #3d5674;border-radius:9px;overflow:hidden}.repository-international-field+.repository-international-field{border-top:1px solid #3d5674}.repository-international-field>summary:hover,.repository-international-stack>summary:hover{background:#192d48}.repository-international-field>ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:3px 20px;margin:0;padding:5px 18px 15px;list-style:none;display:grid}.repository-international-field li{min-width:0}.repository-international-field button{text-align:left;overflow-wrap:anywhere;min-height:44px;font-size:.8125rem;line-height:1.6}.repository-international-comparison :is(a,summary):focus-visible,.repository-international-review :is(button,summary):focus-visible{outline-offset:3px;outline:2px solid #c9e2ff}.repository-international-review .repository-international-field>summary:focus-visible{outline-offset:-3px}.repository-view-navigation{border-bottom:1px solid #33445e;flex-wrap:wrap;gap:6px;margin:0 0 20px;padding:0 0 20px;display:flex}.repository-view-navigation a{color:#c4d1e7;border:1px solid #0000;border-radius:9px;align-items:center;min-height:44px;padding:10px 16px;font-size:.875rem;line-height:1.5;text-decoration:none;display:inline-flex}.repository-view-navigation a:hover{color:#edf4ff;background:#1b2c45}.repository-view-navigation a[aria-current=page]{color:#f3f7ff;background:#253850;border-color:#5879a6}.repository-searchbar--compact{background:0 0;border:0;border-radius:0;grid-template-columns:minmax(0,1fr) minmax(155px,215px) auto;align-items:center;gap:8px;margin-bottom:18px;padding:0}.repository-searchbar--compact.repository-searchbar--query-only{grid-template-columns:minmax(0,1fr) auto}.repository-searchbar--compact.repository-searchbar--has-query{grid-template-columns:minmax(0,1fr) minmax(155px,215px) auto auto}.repository-searchbar--compact.repository-searchbar--query-only.repository-searchbar--has-query{grid-template-columns:minmax(0,1fr) auto auto}.repository-searchbar--compact label{gap:0;position:relative}.repository-searchbar--compact label>span{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.repository-searchbar--compact input:not([type=hidden]),.repository-searchbar--compact select,.repository-searchbar--compact .repository-searchbar__submit{min-height:44px;padding:9px 12px}.repository-searchbar--compact .repository-searchbar__query,.repository-searchbar--compact .repository-searchbar__field{grid-column:auto}.repository-searchbar--compact .repository-searchbar__clear{grid-area:auto;min-height:44px;padding:0 8px}.repository-searchbar--compact .repository-searchbar__scope{grid-area:auto/1/auto/-1}@media (width<=540px){.repository-searchbar--compact{grid-template-columns:minmax(0,1fr) auto}.repository-searchbar--compact.repository-searchbar--has-query{grid-template-columns:minmax(0,1fr) auto auto}.repository-searchbar--compact .repository-searchbar__field{grid-area:2/1/auto/-1}}.repository-review-group{min-width:0;scroll-margin-top:calc(var(--ark-header-height,76px) + 20px);background:#101b2e;border:1px solid #405a7a;border-radius:12px;margin:16px 0}.repository-review-group>summary{color:#d8e8ff;cursor:pointer;min-height:64px;padding:18px 21px;font-size:1rem;line-height:1.6}.repository-review-group>summary::marker{color:#9dbce3}.repository-review-group>summary strong{font-weight:550}.repository-review-group>summary span{color:#acbfd9;margin-top:4px;margin-left:20px;font-size:.8125rem;display:block}.repository-review-group>summary:hover{background:#192b44;border-radius:12px}.repository-review-group>div{min-width:0;padding:0 clamp(16px,3vw,25px) 20px}.repository-review-group>div>.repository-core:first-child,.repository-review-group>div>.repository-roadmap:first-child{margin-top:5px;padding-top:15px}.repository-review-group>div>p{color:#bdcde3;max-width:90ch;font-size:.875rem;line-height:1.75}.repository-review-group>div>h3{color:#e3edff;font-size:1.125rem;font-weight:550}.repository-section-links{flex-wrap:wrap;gap:8px 22px;margin:18px 0 22px;display:flex}.repository-section-links a{color:#c3ddff;text-underline-offset:4px;align-items:center;min-height:44px;font-size:.875rem;display:inline-flex}.repository-status>h2,.repository-connection-view>h2{color:#e3edff;margin:0 0 12px;font-size:1.5rem;font-weight:550;line-height:1.4}.repository-source-view h3,.repository-review-group h3{scroll-margin-top:calc(var(--ark-header-height,76px) + 20px)}@media (width<=540px){.repository-view-navigation{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.repository-view-navigation a{padding:10px 12px}.repository-view-navigation a:last-child:nth-child(odd){grid-column:1/-1}.repository-review-group>summary{padding:16px}}@media (width<=900px){.repository-international-review .repository-international-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=540px){.repository-international-metrics>div{padding:14px}.repository-international-metrics dt{font-size:.75rem}.repository-international-metrics dd{font-size:1.4rem}.repository-international-summary-row{gap:7px 10px}.repository-international-field>ul{grid-template-columns:minmax(0,1fr)}}.university-circle{color:#e6efff;scroll-margin-top:calc(var(--ark-header-height,76px) + 20px);background:#101b2e;border:1px solid #3d5674;border-radius:13px;padding:clamp(18px,2.5vw,28px)}.university-circle__heading{justify-content:space-between;align-items:center;gap:12px 24px;display:flex}.university-circle .repository-kicker{color:#b6caff;margin:0 0 8px;font-size:.75rem}.university-circle__heading :is(h2,h3){color:#eef4ff;letter-spacing:-.025em;margin:0;font-size:1.375rem;font-weight:550;line-height:1.35}.university-circle__heading>span{color:#abc1de;font-size:.8125rem;line-height:1.6}.university-circle__introduction{color:#c5d3e8;max-width:76ch;margin:14px 0 8px;font-size:.9375rem;line-height:1.7}.university-circle__about{border-bottom:1px solid #334b68;margin:0 0 18px}.university-circle__about>summary{color:#b8cce7;cursor:pointer;min-height:44px;padding:10px 0;font-size:.8125rem;line-height:1.7}.university-circle__about>summary::marker{color:#9dbce3}.university-circle__about>div{padding:0 0 12px}.university-circle__scope,.university-circle__footnote{color:#b3c5de;max-width:90ch;margin:0 0 10px;font-size:.8125rem;line-height:1.75}.university-circle__filters{flex-wrap:wrap;align-items:end;gap:14px;margin:0 0 14px;display:flex}.university-circle__filters label{color:#b9c9e2;flex:1;gap:7px;min-width:160px;font-size:.8125rem;font-weight:500;display:grid}.university-circle__filters select{color:#e6efff;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;width:100%;min-height:44px;font:inherit;background:#101c31;border:1px solid #526582;border-radius:8px;padding:9px 12px}.university-circle .foundations-text-button{color:#c3ddff;min-height:44px;font-size:.8125rem}.university-circle__result{color:#b6c9e5;margin:0 0 16px;font-size:.8125rem;line-height:1.6}.university-circle__countries{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 20px;display:grid}.university-circle__country{min-width:0}.university-circle__country h4{color:#adc3e2;margin:0 0 9px;font-size:.8125rem;font-weight:500;line-height:1.6}.university-circle__institution{background:#121f34;border:1px solid #3d5674;border-radius:10px;margin-bottom:8px;overflow:hidden}.university-circle__institution>summary{color:#d0e2fb;cursor:pointer;min-height:44px;padding:13px 14px}.university-circle__institution>summary::marker{color:#9dbce3}.university-circle__summary-row{vertical-align:top;align-items:start;gap:12px;width:calc(100% - 1.2em);display:inline-flex}.university-circle__summary-main{flex:1;gap:6px;min-width:0;display:grid}.university-circle__institution strong{color:#e5efff;overflow-wrap:anywhere;font-size:.9375rem;font-weight:550;line-height:1.5}.university-circle__institution small{color:#aabed9;font-size:.75rem;line-height:1.6}.university-circle__count{color:#adc4e2;font-variant-numeric:tabular-nums;white-space:nowrap;flex-shrink:0;font-size:.75rem;line-height:1.8}.university-circle__institution>summary:hover{background:#1b2c45}.university-circle__institution>summary:focus-visible{outline-offset:-3px;outline:2px solid #b7d5f5}.university-circle__institution[open]>summary{background:#192b43;border-bottom:1px solid #3d5674}.university-circle__body{padding:4px 14px 8px}.university-circle__body ul{margin:0;padding:0;list-style:none}.university-circle__body li{border-top:1px solid #334b68;padding:10px 0}.university-circle__body a{color:#c3ddff;overflow-wrap:anywhere;text-underline-offset:3px;min-height:44px;padding:10px 0;font-size:.875rem;line-height:1.65;display:inline-block}.university-circle__body .university-circle__homepage{color:#aebfde;font-size:.8125rem}.university-circle__resource-context{color:#aabed9;flex-wrap:wrap;gap:4px 12px;font-size:.75rem;line-height:1.6;display:flex}.university-circle__resource-dates{color:#b5c6dc;flex-wrap:wrap;gap:4px 12px;margin-top:6px;font-size:.75rem;line-height:1.7;display:flex}.university-circle__resource-dates>span{overflow-wrap:anywhere;min-width:0}.university-circle__resource-dates time{font-variant-numeric:tabular-nums;white-space:nowrap}.university-circle__resource-note{color:#bdcde2;overflow-wrap:anywhere;max-width:70ch;margin:8px 0 4px;font-size:.8125rem;line-height:1.7}.university-circle__filters select:focus-visible,.university-circle__about>summary:focus-visible,.university-circle__body a:focus-visible,.repository-university-link:focus-visible{outline-offset:3px;outline:2px solid #b7d5f5}.repository-university-link{color:#edf3ff;background:#111e32;border:1px solid #405573;border-radius:12px;margin:18px 0;padding:18px 20px;line-height:1.6;text-decoration:none;display:block}.repository-university-link strong{margin-bottom:5px;font-size:1rem;font-weight:550;display:block}.repository-university-link span{color:#b7c6dd;font-size:.875rem}.repository-university-link:hover{background:#1b2c45;border-color:#93b7e9}@media (width<=760px){.university-circle__countries{grid-template-columns:minmax(0,1fr)}.university-circle__heading{flex-direction:column;align-items:start;gap:8px}}@media (width<=540px){.university-circle__filters{grid-template-columns:minmax(0,1fr);display:grid}.university-circle__filters label{min-width:0}.university-circle__summary-row{flex-wrap:wrap;gap:6px 10px}.university-circle__summary-main{flex-basis:180px}}.ark-map-page{padding:calc(var(--ark-header-height,76px) + 10px) 12px 12px}.ark-map-shell{width:100%;height:calc(100svh - var(--ark-header-height,76px) - 22px);flex-direction:column;min-height:500px;margin:0 auto;display:flex}.ark-map-heading{flex-wrap:wrap;flex:none;justify-content:space-between;align-items:center;gap:4px 18px;margin-bottom:8px;display:flex}.ark-map-heading h1{color:#f2f6ff;margin:0;font-size:clamp(1.3rem,2.2vw,1.8rem);line-height:1.2}.ark-map-heading nav{flex-wrap:wrap;gap:8px 20px;display:flex}.ark-map-heading nav a{color:#c5dcff;border-bottom:1px solid #657797;align-items:center;min-height:32px;font-size:.8125rem;text-decoration:none;display:inline-flex}.ark-map-sr-only,.ark-map-page .sr-only{clip-path:inset(50%);white-space:nowrap;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}.ark-map-entry{flex:none;align-items:center;gap:10px;margin:0 0 8px;display:flex}.ark-map-entry button,.ark-overview__actions button,.ark-map-guide summary{color:#d8e8ff;cursor:pointer;min-height:44px;font:inherit;background:#142238;border:1px solid #4b6283;border-radius:9px;padding:8px 12px;font-size:.8125rem}.ark-map-entry button{flex:none}.ark-map-entry button[aria-pressed=true]{background:#263b59;border-color:#a4c7ec}.ark-map-entry label{flex:1;min-width:0;max-width:430px;display:flex}.ark-map-entry select{color:#e3eeff;width:100%;min-width:0;min-height:44px;font:inherit;background:#132039;border:1px solid #536987;border-radius:8px;padding:8px 10px;font-size:.875rem}.ark-map-panel{flex:1;min-width:0;min-height:260px;position:relative}.ark-map-panel>.ark-overview,.ark-map-panel>.knowledge-map--workspace{flex-direction:column;min-width:0;height:100%;min-height:0;display:flex;position:relative}.ark-map-panel>.knowledge-map__loading{height:100%;min-height:0}.ark-map-panel .knowledge-map--workspace .knowledge-map__body{flex-direction:column;flex:1;min-height:0;display:flex}.ark-map-panel .knowledge-map--workspace .knowledge-map__body[hidden]{display:none}.ark-map-panel .knowledge-map__canvas{border-radius:12px;flex:1;min-height:0}.ark-map-panel .knowledge-map--workspace .knowledge-map__viewport,.ark-map-panel .ark-overview__viewport{height:100%;min-height:0}.ark-map-panel .knowledge-map__space{background-image:radial-gradient(#50688a35 1px,#0000 1px);background-size:24px 24px}.ark-map-panel .knowledge-map__graph{background-image:none}.ark-map-panel .knowledge-map__zoom{bottom:12px;right:12px}.ark-map-panel .knowledge-map__toolbar,.ark-overview__heading{flex-wrap:wrap;flex:none;justify-content:space-between;align-items:center;gap:6px;margin:0 0 8px;display:flex;position:relative}.ark-overview__actions{flex-wrap:wrap;gap:6px;display:flex}.ark-map-panel .knowledge-map__toolbar button{min-height:44px;padding:8px 12px;font-size:.8125rem}.ark-map-guide{flex:none;margin:0}.ark-map-guide summary{align-items:center;gap:7px;list-style:none;display:flex}.ark-map-guide summary::-webkit-details-marker{display:none}.ark-map-guide summary:after{content:"+"}.ark-map-guide[open] summary:after{content:"−"}.ark-map-guide__body{z-index:8;overscroll-behavior:contain;color:#c4d4eb;background:#122039fa;border:1px solid #5a7296;border-radius:10px;width:min(520px,100%);max-height:min(360px,55svh);padding:16px 18px;font-size:.8125rem;line-height:1.6;position:absolute;top:calc(100% + 4px);right:0;overflow:auto;box-shadow:0 8px 24px #0007}.ark-map-guide__body p{margin:0 0 12px}.ark-map-guide__body p:last-child{margin-bottom:0}.ark-map-guide__body .foundation-field-context{margin:12px 0 0}.ark-map-guide__body a{color:#c5defd}.ark-map-page button:focus-visible,.ark-map-page select:focus-visible,.ark-map-page summary:focus-visible,.ark-map-page a:focus-visible{outline-offset:3px;outline:2px solid #c2ddff}.ark-overview__connections{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}.ark-overview__connections path{fill:none;stroke-width:1.5px;opacity:.38}.ark-overview__root,.ark-overview__direction,.ark-overview__field{z-index:1;text-align:left;color:#eff5ff;border:1px solid var(--direction-accent,#a0b7df);font:inherit;background:#111f35;border-radius:12px;flex-direction:column;justify-content:center;align-items:start;gap:8px;padding:18px;text-decoration:none;display:flex;position:absolute}.ark-overview__field{cursor:pointer}.ark-overview__field:hover,.ark-overview__direction:hover{background:#233a58}.ark-overview__field strong{overflow-wrap:anywhere;font-size:.9375rem;font-weight:550;line-height:1.35}.ark-overview__root{text-align:center;background:#233552;border-color:#b7d4fc;align-items:center;width:280px;height:94px;font-size:1.1rem;font-weight:600}.ark-overview__direction{width:268px;height:108px}.ark-overview__direction strong{font-size:1rem;line-height:1.4}.ark-overview__field small,.ark-overview__direction small,.ark-overview__root small{color:#b5c9e6;font-size:.75rem;font-weight:400}.ark-overview__directory{z-index:5;color:#c9d8ef;background:#112039f5;border:1px solid #526b8d;border-radius:9px;max-width:calc(100% - 24px);margin:0;padding:0 12px;position:absolute;bottom:12px;left:12px}.ark-overview__directory[open]{overscroll-behavior:contain;width:min(760px,100% - 24px);top:56px;overflow:auto}.ark-overview__directory summary{cursor:pointer;min-height:44px;padding:10px 0;font-size:.8125rem}.ark-overview__directory section{margin:20px 0}.ark-overview__directory h3{color:#d8e9ff;font-size:1rem}.ark-overview__directory ul{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 20px;padding:0;list-style:none;display:grid}.ark-overview__directory button,.ark-overview__directory a{text-align:left;color:#c5defd;cursor:pointer;min-height:44px;font:inherit;text-underline-offset:4px;background:0 0;border:0;padding:8px 0;font-size:.8125rem;text-decoration:underline;display:block}@media (width<=700px){.ark-map-page{padding:calc(var(--ark-header-height,72px) + 8px) 8px 8px}.ark-map-shell{height:calc(100svh - var(--ark-header-height,72px) - 16px);min-height:440px}.ark-map-heading{gap:2px 12px;margin-bottom:6px}.ark-map-heading nav{gap:8px 16px}.ark-map-heading nav a{min-height:30px;font-size:.75rem}.ark-map-entry{gap:6px;margin-bottom:6px}.ark-map-entry button,.ark-map-entry select,.ark-overview__actions button,.ark-map-panel .knowledge-map__toolbar button,.ark-map-guide summary{padding:8px 9px;font-size:.75rem}.ark-map-entry label{max-width:none}.ark-map-panel .knowledge-map__toolbar,.ark-overview__heading{gap:6px;margin-bottom:6px}.ark-map-panel .knowledge-map__actions,.ark-overview__actions{display:contents}.ark-map-guide{margin-left:auto}.ark-overview__directory{bottom:76px}.ark-overview__directory[open]{top:54px}.ark-overview__directory ul{grid-template-columns:minmax(0,1fr)}.ark-map-panel .knowledge-map__zoom{bottom:10px;right:10px}}.engineering-english-lesson .engineering-figure{min-width:0;max-width:48rem;margin:1.6rem 0}.engineering-english-lesson .engineering-figure-scroll{overscroll-behavior-inline:contain;border-radius:1rem;max-width:100%;overflow-x:auto}.engineering-english-lesson .engineering-figure-scroll svg{width:720px;max-width:none;height:auto;display:block}.engineering-english-lesson .engineering-figure figcaption{color:var(--text-muted,#bac8db);margin-top:.8rem;font-size:.94rem;line-height:1.6}.engineering-english-lesson .engineering-table-scroll{overscroll-behavior-inline:contain;max-width:100%;margin:1.4rem 0;overflow-x:auto}.engineering-english-lesson table{border-collapse:collapse;width:100%;min-width:28rem;font-size:.95rem}.engineering-english-lesson caption{text-align:left;padding-bottom:.6rem;font-weight:600}.engineering-english-lesson td,.engineering-english-lesson th{text-align:left;border-bottom:1px solid #53657f;padding:.7rem}.engineering-english-lesson .knowledge-preview__sections{min-width:0}.engineering-figure-scroll:focus-visible,.engineering-table-scroll:focus-visible{outline:3px solid var(--ark-graph-cyan,#72d8ef);outline-offset:3px}.materials-english-lesson .materials-figure{min-width:0;max-width:44rem;margin:1.6rem 0}.materials-english-lesson .materials-figure-scroll{overscroll-behavior-inline:contain;border-radius:1rem;max-width:100%;overflow-x:auto}.materials-english-lesson .materials-figure-scroll svg{width:640px;max-width:none;height:auto;display:block}.materials-english-lesson .materials-figure figcaption{color:var(--text-muted,#bac8db);margin-top:.8rem;font-size:.94rem;line-height:1.6}.materials-english-lesson .materials-table-scroll{overscroll-behavior-inline:contain;max-width:100%;margin:1.4rem 0;overflow-x:auto}.materials-english-lesson table{border-collapse:collapse;width:100%;min-width:28rem;font-size:.95rem}.materials-english-lesson caption{text-align:left;padding-bottom:.6rem;font-weight:600}.materials-english-lesson td,.materials-english-lesson th{text-align:left;border-bottom:1px solid #53657f;padding:.7rem}.materials-english-lesson .knowledge-preview__sections{min-width:0}.materials-figure-scroll:focus-visible,.materials-table-scroll:focus-visible{outline:3px solid var(--ark-graph-cyan,#72d8ef);outline-offset:3px}
