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.subject-dot{filter:brightness(1.5)}.dark .subject-card:after{color:var(--accent)}
@keyframes appear{from{opacity:.35;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1500px){.hero{padding:42px}.hero-compass{padding:27px}.subject-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.subject-card h3{font-size:19px}.subject-card p{min-height:65px}}
@media(max-width:1220px){.lesson-grid{grid-template-columns:1fr}.lesson-aside{display:none}.hero{grid-template-columns:minmax(0,1fr) 245px;padding:28px;gap:20px}.hero h1{font-size:38px}.hero-compass{padding:20px}.app-layout{grid-template-columns:230px minmax(0,1fr)}.brand-area{width:198px}.topbar{padding:0 24px;gap:20px}main{padding:30px 30px 60px}.schedule-topics{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:1000px){.hero{grid-template-columns:1fr}.hero-compass{display:block}.hero-compass h3{margin-top:12px;max-width:none}.hero-compass p{max-width:90%}.hero-compass svg{width:140px;top:0}.hero-compass a{display:inline-block}.search-launch kbd{display:none}.search-launch{width:300px}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.subject-card{padding:20px}.subject-card h3{font-size:18px}.subject-card:after{right:18px}.diagram-grid.three{grid-template-columns:1fr}.history-timeline{grid-template-columns:1fr}.history-timeline .diagram-pill{text-align:left}.history-timeline .diagram-pill strong{margin-bottom:3px}.diagram-chain{flex-wrap:wrap}.lab-grid{grid-template-columns:1fr}.glossary-grid{grid-template-columns:1fr}.periods button{font-size:10px}}
@media(max-width:760px){.topbar{height:68px;padding:0 15px;gap:10px}.brand-area{width:auto;display:flex;align-items:center;gap:5px}.brand{font-size:19px;gap:9px}.brand-mark{width:36px;height:36px;font-size:12px;border-radius:10px}.brand small{font-size:8px}.mobile-toggle{display:block;font-size:19px;min-width:32px;padding:5px}.cohort{display:none}.header-actions{gap:0}.search-launch{margin-left:auto;width:40px;min-width:40px;height:40px;justify-content:center;padding:4px}.search-launch>span:nth-child(2){display:none}.app-layout{display:block}.sidebar{display:none;position:fixed;z-index:45;top:68px;left:0;bottom:0;width:275px;height:calc(100dvh - 68px);background:var(--paper);box-shadow:20px 0 50px #163e3230;padding-top:20px}.sidebar.open{display:block}.menu-scrim:not([hidden]){display:block;position:fixed;inset:68px 0 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span{font-size:12px}.toolbar select{min-width:130px;font-size:12px}.toolbar .chip{font-size:11px}.source-card{padding:19px}.source-card h3{font-size:15px}.schedule-row{padding:19px}.schedule-row h3{font-size:18px}.schedule-topics{gap:7px}.schedule-topics>div{font-size:11px}.note-card{padding:19px}.note-card h3{font-size:17px}.note-card .reference{font-size:13px;padding:15px}.toast{bottom:80px}.footer{font-size:10px}.step-illustration{gap:15px}.footprint{font-size:29px}.header-actions .icon-button{font-size:23px;min-width:36px}.role-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{body{background:#fff;color:#000;font-size:12pt}.sidebar,.topbar,.mobile-nav,.lesson-aside,.toolbar,.footer,.lesson-bottom,.quiz-actions,.notebook-actions,.search-launch,.toast,dialog{display:none!important}.app-layout,.lesson-grid{display:block}main{padding:0;max-width:none}.hero-compass{display:none}.note-card,.worked,.visual,.remember{break-inside:avoid;border-color:#aaa;box-shadow:none}.reference{background:transparent!important}.note-card{margin:0 0 20px}.note-card label{display:none}a{color:#000}.note-card details{display:block}.note-card details:not([open])>*:not(summary){display:block}input,textarea{border:1px solid #aaa}.term{color:#000;border:0}}

main:focus{outline:none}.lesson-shortcuts{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 28px}.lesson-shortcuts a{display:inline-flex;align-items:center;min-height:44px;padding:9px 14px;border:1px solid var(--line);border-radius:8px;background:var(--paper);text-decoration:none;font-size:13px;font-weight:600}.lesson-shortcuts a:hover{background:var(--soft);border-color:var(--accent)}

.reference-extra{padding:20px;border:1px solid var(--line);border-radius:12px;margin:30px 0;background:var(--soft)}.reference-extra summary{cursor:pointer;font-weight:650}.reference-extra p{margin-top:15px;font-size:14px}.reference-body{max-width:900px;margin-top:28px}.reference-body h3{margin-top:32px}.reference-body p{font-size:15px}.reference-body>p:first-child{margin-top:24px}

@media(max-width:760px){
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}