/* Shared, purpose-based themes. Reading surfaces stay quiet; green identifies actions. */
:root{--bg:#f3f4ef;--surface:#fafbf6;--surface-2:#e9ede6;--ink:#23302c;--muted:#56655e;--line:#cad3ca;--strong-line:#97aaa0;--link:#176b60;--green:#176b60;--mint:#e1eee7;--red:#a52f38;--danger-bg:#f6e4e3;--success-bg:#e1eee7;--warning:#795619;--figure-bg:#16251e;--scene-bg:#dce3da;color-scheme:light}
:root[data-theme=dark]{--bg:#191e1c;--surface:#212824;--surface-2:#29322d;--ink:#edf1eb;--muted:#b4c2b7;--line:#3d4c42;--strong-line:#718778;--link:#9cd8bd;--green:#176b60;--mint:#2a4034;--red:#ffaaa6;--danger-bg:#412a2b;--success-bg:#2a4034;--warning:#e6c389;--figure-bg:#16251e;--scene-bg:#28352e;color-scheme:dark}
body,body.locked,#loginView{background:var(--bg);color:var(--ink)}body.locked{background:radial-gradient(ellipse at 75% 15%,color-mix(in srgb,var(--mint) 75%,transparent),transparent 45%),var(--bg)}#loginView{background:transparent}body:not(.locked) #ambientParticles{display:none}body.locked #ambientParticles{opacity:.35}body>header{border-bottom:1px solid var(--line);padding-top:22px;padding-bottom:22px;background:var(--surface);gap:20px;flex-wrap:wrap}main{max-width:1280px}h1,h2,h3,.landingCopy h1,.landingCopy h2,.landingAccess h2,.landingAccess .loginCard h2,#emailCompletion h1{color:var(--ink)}.muted,.syncStatus,.sourceTag,.landingCopy p,.landingCopy .chapterNumber,.landingAccess p,.landingFooter{color:var(--muted)}.landingCopy p{font-weight:400}.kicker,.landingCopy .eyebrow,.landingAccess .eyebrow{color:var(--link);font-size:12px;letter-spacing:.07em}.atlasWordmark{color:var(--ink)!important}.atlasWordmark>small{color:var(--muted)!important}.landingNav a:not(.landingButton){color:var(--ink)}button{color:var(--ink);border-color:var(--strong-line);min-height:44px}button:hover{background:var(--surface-2);border-color:var(--link)}button:active{transform:translateY(1px)}.primary,.landingButton,.landingNav .landingButton{color:#fff;background:var(--green)}.primary:hover,.landingButton:hover{background:#125a50;color:#fff}.primary:disabled{color:#fff;opacity:.6}a,.lessonFigure a{color:var(--link)}a:hover{color:var(--ink)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--link);outline-offset:4px}.themePicker select{font-size:12px;padding:8px 12px;min-height:40px;width:auto}.themePicker{margin-left:auto}.landingNav>div{display:flex;gap:20px;align-items:center}.srOnly{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}input,select,textarea{background:var(--surface)!important;color:var(--ink)!important;border-color:var(--strong-line)!important;color-scheme:inherit}input::placeholder,textarea::placeholder{color:var(--muted)}.pill,nav button.active,.propTabs button.active,.authTabs .selected{background:var(--mint)!important;color:var(--link)!important;border-color:var(--strong-line)}.panel,.propCard,.guideCols>article,.stat,.qbox,.lesson,.notice,.osceDetail,.physicalControls,.patientPanel,.anatomyPanel,.cloudBanner,.studyCard,.equipmentDemo,.demoDialog,.modal,.modalCard,.landingAccess .loginCard,body.completing #emailCompletion{background:var(--surface)!important;color:var(--ink)!important;border-color:var(--line)!important;border-radius:20px;box-shadow:none!important}.propCard{padding:24px}.propGrid{gap:20px}.propTabs button{color:var(--muted)}.osceFeedback,.osceSteps,.patientMessage,.anControls,.anCaption,.anModelLoading,.anFeedback,.viewerbar,.preview .caption,.key,.loginNote{background:var(--surface-2)!important;color:var(--ink)!important}.patientPanel,.osceDetail,.physicalControls{border:1px solid var(--line)}.physicalControls button{color:var(--ink);border-color:var(--strong-line)}.physicalControls p,.benchMore summary,.benchItem p,.trailLesson p,.imageCredit summary,.studyText figcaption,.deepLesson .tableHint,.lessonReturn{color:var(--muted)}.error{color:var(--red)}.wrong{background:var(--danger-bg)!important;color:var(--red)!important}.correct,.notice.success{background:var(--success-bg)!important;color:var(--link)!important}.bigScore,.studySummary strong,.trailNumber,.materialIcon,.equipmentDemo output,.answer h3{color:var(--link)}.trailNumber{background:var(--surface);border-color:var(--strong-line)}.trailNodes .done{background:var(--mint);border-color:var(--strong-line)}.trailLesson:before{background:var(--line)!important}.benchItem,.guideCols>article,.osceControls>.panel{border-color:var(--line)}.landingFooter{border-color:var(--line)}.studyCard{border:1px solid var(--line);margin:28px auto}.studyCard h2{font-size:clamp(23px,2.6vw,30px);line-height:1.4}.studyChoices button{line-height:1.55;min-height:55px}.studyFeedback:empty{display:none}.studyFeedback p{margin:12px 0}.studyFeedback details{margin-top:20px}.studyFeedback[data-correct=false]{border-top:2px solid var(--red)}.studyFeedback[data-correct=true]{border-top:2px solid var(--link)}.questionToolbar{display:flex;gap:16px;flex-wrap:wrap;align-items:end;margin:25px 0}.questionToolbar label{display:grid;gap:8px;min-width:150px}.questionToolbar select{min-height:44px}.questionOrder{list-style:none;padding:0;display:grid;gap:10px}.questionOrder li{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--line);border-radius:12px}.questionOrder li>span{flex:1}.questionOrder button{padding:6px 12px}.questionMatch{display:grid;gap:18px;margin:24px 0}.questionMatch label{display:grid;grid-template-columns:1fr 1.3fr;align-items:center;gap:20px}.questionVisual{width:100%;max-height:420px;object-fit:contain;border-radius:16px;background:var(--figure-bg);margin:20px 0}.inlineCheck{background:var(--surface);border:1px solid var(--line);padding:24px;border-radius:16px;margin:40px 0}.inlineCheck h3{font-size:19px;line-height:1.55;margin:16px 0}.inlineCheck button{font-size:14px}.readingShell{display:grid;grid-template-columns:230px minmax(0,760px);gap:52px;align-items:start;margin-top:36px}.readingIndex{position:sticky;top:24px;max-height:calc(100vh - 48px);overflow:auto;padding-right:12px;scrollbar-width:thin}.readingIndex details{margin-top:18px}.readingIndex summary{font-size:15px;color:var(--ink);cursor:pointer}.readingIndex ol{padding-left:20px;margin:16px 0}.readingIndex li{margin:4px 0;color:var(--muted)}.readingIndex button{border:0;border-radius:8px;text-align:left;font-size:13px;line-height:1.5;min-height:40px;padding:7px 9px;color:var(--muted)}.readingIndex button[aria-current=true]{background:var(--mint);color:var(--link);font-weight:600}.readingIndex progress{width:100%;height:6px}.readingIndex>p{font-size:12px;color:var(--muted)}.readingResume{display:flex;justify-content:space-between;align-items:center;gap:20px;background:var(--surface);padding:16px 20px;border:1px solid var(--line);border-radius:14px;font-size:14px;margin-top:25px}.studying #prop>.kicker,.studying #prop>h1,.studying .propIntro,.studying #prop>.propTabs,.studying #osceResume{display:none}.studying #propContent>h1{font-size:clamp(30px,4vw,48px);max-width:900px;line-height:1.16}.studyTop{margin:8px 0 28px}.deepLesson{max-width:760px;min-width:0}.deepLesson p{color:var(--ink);max-width:70ch;font-size:17px;line-height:1.82}.deepLesson .lessonOpening{margin:0 0 52px}.lessonOpening ul,.lessonTechnique ol{color:var(--ink)}.lessonSectionNumber{color:var(--muted)}.lessonTable{border-color:var(--line)}.lessonTable th,.lessonTable td{border-color:var(--line);color:var(--ink)!important}.lessonTable thead th{background:var(--surface-2);font-weight:600}.lessonCallout{border-color:var(--warning);background:var(--surface);padding:22px 24px;border-radius:0 14px 14px 0}.lessonCallout h3{color:var(--warning);margin-top:0}.deepLesson .lessonCallout p{margin:0}.deepLesson .lessonFigure figcaption p,.deepLesson .lessonFigure figcaption .figureNote{color:var(--muted)}.lessonFigure img{background:var(--figure-bg)}.lessonTechnique{border-color:var(--link)}.lessonNext{border-color:var(--line)}.anStage{background:var(--scene-bg)}.viewer,.preview,.imagearea{background:var(--surface-2)}.lesson:has(input:checked){background:var(--mint)}.lessonReturn:hover{color:var(--link)}.readingIndex button:focus-visible{outline-offset:-2px}.faciesGrid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.faciesExample{margin:0!important}.faciesPortrait{height:245px;width:100%;background-image:url('/learning/figures/facies-v9-refined.webp');background-size:400% 200%;background-repeat:no-repeat;border-radius:14px}.faciesExample h3{margin:18px 0 10px;font-size:21px}.faciesExample p{font-size:15px;line-height:1.7;margin:10px 0}.stationBrief{background:var(--surface);border:1px solid var(--line);padding:20px 24px;border-radius:16px;margin:22px 0}.stationBrief summary{cursor:pointer;font-weight:600}.stationBrief p{line-height:1.65;margin:14px 0}.debriefColumns{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:28px 0}.debriefColumns>section{border:1px solid var(--line);background:var(--surface);padding:24px;border-radius:16px}.debriefColumns p{font-size:14px;line-height:1.7}.propTable{overflow-x:auto}.propTable th,.propTable td{border-color:var(--line)}
@media(max-width:1100px){.readingShell{grid-template-columns:190px minmax(0,1fr);gap:30px}body>header{gap:15px}.accountbar{margin-left:0}.themePicker{margin-left:0}body>header nav{order:4;width:100%}.faciesPortrait{height:220px}}
@media(max-width:900px){.readingShell{display:block}.readingIndex{position:relative;top:0;max-height:none;border-bottom:1px solid var(--line);padding:0 0 22px;margin-bottom:36px}.readingIndex details:not([open]) ol{display:none}.readingIndex ol{columns:2}.readingIndex button{width:100%}.deepLesson{max-width:760px}.studying #propContent>h1{max-width:760px}.readingIndex>p{margin-bottom:0}.landingNav{gap:20px}.landingNav>div{gap:14px;flex-wrap:wrap}.debriefColumns{grid-template-columns:1fr}.osceLayout{gap:24px}}
@media(max-width:600px){body>header{grid-template-columns:1fr auto}body>header .themePicker{grid-row:3;grid-column:1/-1}body>header nav{grid-row:2}.landingNav{align-items:start;padding:25px 20px}.landingNav>div{justify-content:flex-end;gap:12px}.landingNav>div>a:first-of-type{display:none}.landingNav .themePicker select{max-width:125px}.landingNav .landingButton{font-size:12px;padding:11px 16px}.readingIndex ol{columns:1}.readingResume{align-items:flex-start;flex-direction:column}.studyTop{gap:12px}.deepLesson p{font-size:16px;line-height:1.8}.faciesGrid{grid-template-columns:1fr}.faciesPortrait{height:360px;max-width:310px}.questionMatch label{grid-template-columns:1fr;gap:8px}.questionOrder li{flex-wrap:wrap}.questionOrder li>span{flex-basis:70%}.questionToolbar{gap:12px}.questionToolbar label{min-width:0;flex:1 1 45%}.studyCard{padding:22px}.inlineCheck{padding:20px}.studyChoices button{padding:14px;font-size:14px}.studyTop .kicker{text-align:right}.studySummary{gap:25px}.cameraTools button{min-height:44px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important;transition:none!important}}
.faciesPortrait{height:auto!important;aspect-ratio:3/4;max-width:100%;background-size:400% 200%}.faciesExample figcaption{font-size:inherit}.deepLesson .figureNote{color:var(--muted);font-size:14px;line-height:1.7}
@media(min-width:761px){body>header{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;gap:18px;padding-left:30px;padding-right:30px}body>header nav{order:initial;width:auto;display:flex;flex-wrap:wrap;gap:5px}body>header nav button{font-size:12px;padding:9px 11px}body>header .accountbar{border-left:1px solid var(--line);gap:8px;padding-left:12px;margin:0}body>header .accountbar strong{font-size:11px}body>header .syncStatus{font-size:9px}.atlasWordmark>span{font-size:39px}.themePicker select{font-size:11px;padding:8px}.studying main{padding-top:28px}}
@media(min-width:761px) and (max-width:900px){body>header{grid-template-columns:auto 1fr auto}body>header nav{grid-column:1/-1;grid-row:2}body>header .accountbar{grid-column:3;grid-row:1}body>header .themePicker{grid-column:2;grid-row:1;justify-self:end}}

.landingScroll,.motionToggle{color:var(--muted)!important} .motionToggle:hover{color:var(--ink)!important}