:root{
 --bg:#f5f6fb;--surface:#ffffff;--surface2:#f1f2f8;--surface3:#e9ebf5;--ink:#202334;--muted:#727789;
 --line:#e1e3ec;--brand:#6657d9;--brand2:#2aa99a;--brandSoft:#eeebff;--coral:#e26d78;--amber:#d99a32;--blue:#4f83d6;
 --good:#1f9a78;--bad:#d65e6c;--shadow:0 12px 32px rgba(44,46,71,.08);--shadow2:0 18px 50px rgba(44,46,71,.12);
 --rail:#fbfbfe;--radius:20px;--radiusSm:14px
}
body[data-theme="dark"]{--bg:#151723;--surface:#1d2030;--surface2:#24283a;--surface3:#2d3146;--ink:#f3f4fb;--muted:#a5a9bc;--line:#34394f;--brand:#9487ff;--brand2:#4fd2c1;--brandSoft:#2b2850;--coral:#ff8290;--amber:#e8b45c;--blue:#83aef0;--good:#58d1ad;--bad:#ff8290;--shadow:0 14px 36px rgba(0,0,0,.25);--shadow2:0 22px 60px rgba(0,0,0,.35);--rail:#191c2a}
body[data-theme="midnight"]{--bg:#0d1221;--surface:#151c2e;--surface2:#1a2439;--surface3:#22304a;--ink:#f1f5ff;--muted:#95a1ba;--line:#293854;--brand:#83a6ff;--brand2:#4fd7ca;--brandSoft:#1a3151;--coral:#ff778a;--amber:#f0b657;--blue:#83a6ff;--good:#55cfaa;--bad:#ff778a;--rail:#10172a}
body[data-theme="sage"]{--bg:#f2f6f2;--surface:#ffffff;--surface2:#edf4ef;--surface3:#e4eee7;--ink:#26312c;--muted:#718078;--line:#dbe6de;--brand:#4c7b6a;--brand2:#6f9c7f;--brandSoft:#e4efe8;--coral:#c36e73;--amber:#b48a42;--blue:#5f84a5;--good:#4c8d72;--bad:#c26168;--rail:#f8fbf8}
body[data-theme="paper"]{--bg:#f7f3eb;--surface:#fffdf8;--surface2:#f3eee5;--surface3:#ebe4d8;--ink:#2f2b27;--muted:#7e746b;--line:#e2d8ca;--brand:#6e5bc7;--brand2:#408f86;--brandSoft:#eee8fb;--coral:#c96d72;--amber:#ae7d34;--blue:#5f7fa7;--good:#438773;--bad:#c95f67;--rail:#fcfaf6}
/* backwards-compatible theme aliases */
body[data-theme="light"],body[data-theme="sand"]{--bg:#f5f6fb;--surface:#fff;--surface2:#f1f2f8;--surface3:#e9ebf5;--ink:#202334;--muted:#727789;--line:#e1e3ec;--brand:#6657d9;--brand2:#2aa99a;--brandSoft:#eeebff;--rail:#fbfbfe}
body[data-theme="emerald"]{--bg:#eff7f4;--surface:#fff;--surface2:#e8f3ef;--surface3:#dfece7;--ink:#19312a;--muted:#6c827a;--line:#d2e4dc;--brand:#2c9479;--brand2:#5ab69d;--brandSoft:#ddf1ea;--rail:#f5fbf8}
body[data-theme="slate"],body[data-theme="space"],body[data-theme="lightning"],body[data-theme="sunset"]{--bg:#151723;--surface:#1d2030;--surface2:#24283a;--surface3:#2d3146;--ink:#f3f4fb;--muted:#a5a9bc;--line:#34394f;--brand:#9487ff;--brand2:#4fd2c1;--brandSoft:#2b2850;--rail:#191c2a}

*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;min-height:100vh;font-size:15px}button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}.appShell{min-height:100vh;display:grid;grid-template-columns:244px minmax(0,1fr)}
.studyRail{position:sticky;top:0;height:100vh;background:var(--rail);border-right:1px solid var(--line);padding:18px 14px 16px;display:flex;flex-direction:column;gap:14px;z-index:20}
.brandLockup{display:flex;align-items:center;gap:11px;padding:6px 8px 14px}.brandMark{width:42px;height:42px;border-radius:14px;background:linear-gradient(145deg,var(--brand),color-mix(in srgb,var(--brand) 55%,var(--brand2)));display:grid;place-items:center;color:white;box-shadow:0 9px 22px color-mix(in srgb,var(--brand) 28%,transparent);font-weight:900;position:relative;overflow:hidden}.brandMark:before{content:"";width:21px;height:4px;border-radius:4px;background:white;position:absolute}.brandMark:after{content:"";height:21px;width:4px;border-radius:4px;background:white;position:absolute}.brandName{font-size:19px;font-weight:850;letter-spacing:-.03em}.brandTag{font-size:10px;color:var(--muted);margin-top:2px}
.navWrap{overflow:auto;padding-right:2px}.navGroup{margin:8px 0 14px}.navGroupLabel{text-transform:uppercase;letter-spacing:.11em;font-size:9px;font-weight:800;color:var(--muted);padding:0 10px 5px}.nav-btn{display:flex;align-items:center;gap:10px;width:100%;border:0;background:transparent;color:var(--muted);padding:9px 10px;border-radius:12px;font-size:12px;font-weight:720;text-align:left;margin:2px 0}.nav-btn span{display:grid;place-items:center;width:25px;height:25px;border-radius:8px;background:transparent;font-size:14px}.nav-btn:hover{background:var(--surface2);color:var(--ink)}.nav-btn.active{background:var(--brandSoft);color:var(--brand)}.nav-btn.active span{background:color-mix(in srgb,var(--brand) 13%,transparent)}
.railFoot{margin-top:auto;padding:11px;border-radius:14px;background:var(--surface2);border:1px solid var(--line);font-size:10px;color:var(--muted);line-height:1.45}.railFoot b{display:block;color:var(--ink);font-size:11px;margin-bottom:3px}
.workspace{min-width:0}.app{max-width:1500px;margin:0 auto;padding:0 26px 80px}.top{height:74px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);margin-bottom:0;position:sticky;top:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(16px);z-index:15}.top .brand{display:none}.topLeft{display:flex;align-items:center;gap:12px;min-width:0}.crumb{font-size:11px;color:var(--muted)}.topClass{min-width:210px}.topClass select{height:38px}.actions,.rowActions,.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.space{justify-content:space-between}.wrap{flex-wrap:wrap}
.btn,button{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:12px;padding:9px 13px;font-weight:760;font-size:12px;box-shadow:none}.btn:hover,button:hover{transform:translateY(-1px);box-shadow:0 7px 16px rgba(38,42,70,.08)}.btn.primary,button:not(.secondary):not(.danger):not(.ghost):not(.icon-btn):not(.nav-btn):not(.choice){background:var(--brand);border-color:var(--brand);color:white}.btn.secondary,button.secondary{background:var(--surface);color:var(--ink)}button.ghost{background:transparent;border-color:transparent;color:var(--muted)}button.danger,.btn.danger{background:color-mix(in srgb,var(--bad) 9%,var(--surface));border-color:color-mix(in srgb,var(--bad) 22%,var(--line));color:var(--bad)}.btn.small{font-size:10px;padding:6px 9px;border-radius:9px}.icon-btn{width:35px;height:35px;border-radius:11px;display:grid;place-items:center;padding:0}
.focusBar{display:none}.tabs{display:none}.main{padding-top:24px}.pageHead{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;margin:0 0 18px}.pageHead h2{margin:0;font-size:27px;letter-spacing:-.04em}.pageHead p{margin:5px 0 0;color:var(--muted);font-size:12px}.content{min-width:0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:none;padding:18px}.card:hover{border-color:color-mix(in srgb,var(--brand) 18%,var(--line))}.card h2,.card h3{margin-top:0;letter-spacing:-.025em}.panel{padding:18px}.grid{display:grid;gap:14px}.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.stack{display:grid;gap:13px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:24px 0 13px}.section-title:first-child{margin-top:0}.section-title h2{font-size:18px;margin:0}.section-title p{font-size:11px;margin:4px 0 0;color:var(--muted)}.muted{color:var(--muted)}.small{font-size:10px}.kicker{text-transform:uppercase;letter-spacing:.12em;font-size:9px;font-weight:850;color:var(--muted)}
.hero{border:0;border-radius:26px;padding:26px;background:linear-gradient(135deg,var(--brandSoft),color-mix(in srgb,var(--brand2) 10%,var(--surface)));display:grid;grid-template-columns:minmax(0,1.35fr) minmax(250px,.65fr);gap:22px;align-items:center;position:relative;overflow:hidden}.hero:after{content:"";position:absolute;width:270px;height:270px;border-radius:50%;right:-85px;top:-120px;background:color-mix(in srgb,var(--brand) 10%,transparent)}.hero h2{font-size:30px;line-height:1.08;letter-spacing:-.05em;margin:9px 0 10px;max-width:670px}.hero p{color:var(--muted);font-size:13px;line-height:1.6;max-width:690px}.hero-box{position:relative;z-index:1;background:color-mix(in srgb,var(--surface) 86%,transparent);border:1px solid color-mix(in srgb,var(--brand) 13%,var(--line));padding:17px;border-radius:18px}.hero-box h3{font-size:20px;margin:5px 0}.pill,.badge{display:inline-flex;align-items:center;gap:4px;border-radius:999px;font-size:9px;font-weight:820;padding:5px 8px;border:1px solid var(--line);color:var(--muted);background:var(--surface2)}.pill.brand{background:var(--brandSoft);border-color:transparent;color:var(--brand)}.pill.warn{color:var(--amber)}.pill.danger{color:var(--bad)}
.studyDock{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px}.studyAction{border:1px solid var(--line);background:var(--surface);border-radius:18px;padding:16px;text-align:left;min-height:116px;display:flex;flex-direction:column;justify-content:space-between}.studyAction:hover{border-color:color-mix(in srgb,var(--brand) 32%,var(--line));box-shadow:var(--shadow)}.studyAction .toolIcon{font-size:22px}.studyAction b{display:block;font-size:13px;margin-top:9px}.studyAction span{font-size:10px;color:var(--muted);line-height:1.4}.studyAction.primaryStudy{background:var(--brand);color:#fff;border-color:var(--brand)}.studyAction.primaryStudy span{color:rgba(255,255,255,.72)}
.miniStats{display:flex;gap:10px;flex-wrap:wrap}.miniStat{padding:10px 12px;border-radius:13px;background:var(--surface);border:1px solid var(--line);min-width:110px}.miniStat b{font-size:16px;display:block}.miniStat span{font-size:9px;color:var(--muted)}.stat{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.stat strong{display:block;font-size:26px;margin-top:5px;letter-spacing:-.04em}.stat span{color:var(--muted);font-size:10px}
.courseShelf{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.class-card,.courseCard{position:relative;overflow:hidden;padding:0!important;min-height:200px}.courseCover{height:82px;padding:17px;background:linear-gradient(135deg,color-mix(in srgb,var(--course,#6657d9) 90%,white),color-mix(in srgb,var(--course,#6657d9) 52%,var(--brand2)));color:white;position:relative}.courseCover:after{content:"";position:absolute;right:18px;bottom:-22px;width:76px;height:76px;border-radius:50%;border:14px solid rgba(255,255,255,.13)}.courseCover .courseLabel{font-size:9px;letter-spacing:.1em;text-transform:uppercase;font-weight:850;opacity:.8}.courseCover h3{font-size:18px;margin:6px 0 0;max-width:82%}.courseBody{padding:15px 17px 17px}.courseMeta{font-size:10px;color:var(--muted);min-height:18px}.courseCounts{display:flex;gap:6px;flex-wrap:wrap;margin:12px 0}.courseCounts span{font-size:9px;padding:5px 7px;border-radius:8px;background:var(--surface2);color:var(--muted)}.courseBody button{width:100%}
.workspaceHero{padding:22px;border-radius:22px;background:linear-gradient(130deg,color-mix(in srgb,var(--course,#6657d9) 13%,var(--surface)),var(--surface));border:1px solid var(--line);margin-top:22px}.workspaceHero h2{margin:5px 0;font-size:24px}.workspaceGrid{display:grid;grid-template-columns:minmax(230px,.75fr) minmax(320px,1.15fr) minmax(250px,.85fr);gap:14px;margin-top:14px;align-items:start}.workspacePane{min-height:410px}.paneHead{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:10px}.paneHead h3{margin:0;font-size:15px}.paneHead p{font-size:10px;color:var(--muted);margin:3px 0 0}.sourceDrop{padding:16px;border:1.5px dashed color-mix(in srgb,var(--brand) 28%,var(--line));border-radius:15px;background:var(--surface2);text-align:center;margin-bottom:10px}.sourceDrop b{font-size:12px}.sourceDrop p{font-size:9px;color:var(--muted)}.sourceItem{padding:11px 0;border-bottom:1px solid var(--line)}.sourceItem:last-child{border-bottom:0}.sourceIcon{width:31px;height:31px;border-radius:9px;background:var(--brandSoft);color:var(--brand);display:grid;place-items:center}.sourceInfo{min-width:0;flex:1}.sourceInfo b{font-size:10px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sourceInfo span{font-size:9px;color:var(--muted)}.sourceActions{display:flex;gap:4px;flex-wrap:wrap;margin-top:7px}.sourceActions button{font-size:9px;padding:5px 7px;border-radius:8px}.studyLab{display:grid;gap:9px}.labAction{padding:13px;border:1px solid var(--line);border-radius:14px;background:var(--surface);text-align:left}.labAction b{font-size:11px;display:block}.labAction span{font-size:9px;color:var(--muted);line-height:1.4}.notePreview{padding:12px;border-radius:13px;background:var(--surface2);margin:8px 0}.notePreview b{font-size:11px}.notePreview .note-box{max-height:135px;overflow:auto;margin-top:7px}
input,select,textarea{width:100%;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:11px;padding:9px 10px;outline:none}select{cursor:pointer}textarea{min-height:100px;resize:vertical}input:focus,select:focus,textarea:focus{border-color:color-mix(in srgb,var(--brand) 48%,var(--line));box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 9%,transparent)}label{font-size:9px;color:var(--muted);font-weight:800;display:grid;gap:5px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.form-grid .wide{grid-column:1/-1}
.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;min-width:620px}th,td{padding:11px 9px;border-bottom:1px solid var(--line);font-size:10px;text-align:left;vertical-align:top}th{font-size:8px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}tr:last-child td{border-bottom:0}.progress{height:8px;background:var(--surface2);border-radius:999px;overflow:hidden}.progress>span{height:100%;display:block;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:999px}.kpi-line{display:grid;grid-template-columns:135px 1fr 48px;gap:12px;align-items:center;font-size:10px;margin:11px 0}
.choice{display:block;width:100%;background:var(--surface)!important;color:var(--ink)!important;border:1px solid var(--line)!important;text-align:left;margin:8px 0;padding:12px 14px;border-radius:13px;box-shadow:none!important}.choice:hover{border-color:color-mix(in srgb,var(--brand) 30%,var(--line))!important;background:var(--surface2)!important}.choice.correct{border-color:var(--good)!important;background:color-mix(in srgb,var(--good) 8%,var(--surface))!important}.choice.wrong{border-color:var(--bad)!important;background:color-mix(in srgb,var(--bad) 8%,var(--surface))!important}.callout{padding:12px 14px;border:1px solid color-mix(in srgb,var(--brand) 14%,var(--line));background:var(--brandSoft);border-radius:14px;font-size:10px;line-height:1.55}.file-item,.list-item{padding:11px 0;border-bottom:1px solid var(--line);font-size:10px}.file-item:last-child,.list-item:last-child{border-bottom:0}
.flashStudyShell{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(260px,.55fr);gap:16px;align-items:start}.flashStage{background:transparent;border:0;padding:0}.flashTop{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.deckProgress{font-size:10px;color:var(--muted)}.flashcard{min-height:390px;display:grid;place-items:center;text-align:center;padding:38px;border:1px solid var(--line);border-radius:26px;background:var(--surface);cursor:pointer;box-shadow:var(--shadow2);position:relative}.flashcard:before{content:"";position:absolute;inset:10px 10px auto;height:5px;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand2));opacity:.75}.flashcard h2{font-size:26px;line-height:1.25}.flashcard h3{font-size:21px;line-height:1.35}.flashcard .answer{display:none}.flashcard.revealed .question{display:none}.flashcard.revealed .answer{display:block}.confidenceBar{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.confidenceBar button{padding:11px}.deckList{max-height:520px;overflow:auto}.deckItem{display:block;width:100%;text-align:left;border:0;background:transparent;padding:10px;border-radius:12px;margin:2px 0}.deckItem:hover,.deckItem.active{background:var(--surface2);box-shadow:none}.deckItem b{font-size:10px;display:block}.deckItem span{font-size:9px;color:var(--muted)}
.brainHero{padding:30px;border-radius:26px;background:linear-gradient(135deg,var(--brandSoft),color-mix(in srgb,var(--brand2) 11%,var(--surface)));text-align:center}.brainHero h2{font-size:27px;margin:7px 0}.brainHero p{max-width:680px;margin:0 auto 18px;color:var(--muted);font-size:12px}.brainSearch{max-width:760px;margin:0 auto;display:flex;gap:8px;background:var(--surface);padding:7px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.brainSearch input{border:0;background:transparent;box-shadow:none}.brainSearch button{flex:0 0 auto}.brainQuickRow{display:flex;justify-content:center;gap:7px;flex-wrap:wrap;margin-top:12px}.searchScope{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}.scopeCard{padding:13px;border-radius:14px;background:var(--surface);border:1px solid var(--line);text-align:left}.scopeCard b{font-size:11px}.scopeCard p{font-size:9px;color:var(--muted);margin:3px 0 0}
.note-box{white-space:pre-wrap;background:var(--surface2);border:1px solid var(--line);border-radius:11px;padding:11px;font-size:10px;line-height:1.55}.tag-cloud{display:flex;gap:8px;flex-wrap:wrap}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.success-text{color:var(--good)}.danger-text{color:var(--bad)}.empty{padding:28px;text-align:center;border:1px dashed var(--line);border-radius:14px;color:var(--muted);font-size:10px;background:color-mix(in srgb,var(--surface2) 45%,transparent)}.checklist{display:grid;gap:9px}.checkitem{display:flex;gap:10px;align-items:flex-start;color:var(--ink);font-size:10px}.checkitem input{width:auto;margin-top:2px}.compareGrid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.modal-backdrop{position:fixed;inset:0;background:rgba(18,20,31,.52);z-index:100;display:grid;place-items:center;padding:20px;backdrop-filter:blur(5px)}.modal-backdrop[hidden]{display:none}.modal{background:var(--surface);border:1px solid var(--line);color:var(--ink);border-radius:22px;max-width:780px;width:100%;max-height:88vh;overflow:auto;box-shadow:0 30px 90px rgba(20,23,38,.25)}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}.modal-head h2{font-size:16px;margin:0}.modal-body{padding:18px}.toast{position:fixed;z-index:150;right:24px;bottom:24px;background:var(--ink);color:var(--surface);border-radius:13px;padding:11px 14px;font-size:11px;font-weight:750;box-shadow:var(--shadow2)}.toast[hidden]{display:none}.mobileBottom{display:none}

@media(max-width:1180px){.appShell{grid-template-columns:205px minmax(0,1fr)}.studyRail{padding-left:10px;padding-right:10px}.brandTag{display:none}.workspaceGrid{grid-template-columns:1fr 1fr}.workspaceGrid .workspacePane:last-child{grid-column:1/-1}.studyDock{grid-template-columns:repeat(2,1fr)}.grid.cols-4{grid-template-columns:repeat(2,1fr)}.courseShelf{grid-template-columns:repeat(2,1fr)}}
@media(max-width:820px){body{padding-bottom:75px}.appShell{display:block}.studyRail{display:none}.app{padding:0 14px 90px}.top{height:64px}.top .brand{display:flex;align-items:center;gap:9px}.top .brand .brandMark{width:34px;height:34px;border-radius:11px}.top .brandName{font-size:16px}.top .brandTag{display:none}.topLeft .crumb{display:none}.topClass{min-width:130px}.top .actions #quickAddBtn{font-size:0;padding:9px 11px}.top .actions #quickAddBtn:after{content:"+";font-size:18px}.pageHead{margin-top:18px}.pageHead h2{font-size:23px}.hero{grid-template-columns:1fr;padding:22px}.hero h2{font-size:25px}.hero-box{display:none}.grid.cols-3,.grid.cols-2,.form-grid,.compareGrid,.workspaceGrid,.flashStudyShell{grid-template-columns:1fr}.courseShelf{grid-template-columns:1fr 1fr}.workspaceGrid .workspacePane:last-child{grid-column:auto}.searchScope{grid-template-columns:1fr}.mobileBottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;z-index:90;left:0;right:0;bottom:0;padding:7px 8px calc(7px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--surface) 94%,transparent);border-top:1px solid var(--line);backdrop-filter:blur(16px)}.mobileBottom button{border:0;background:transparent!important;color:var(--muted)!important;padding:6px 4px;font-size:9px;font-weight:800;box-shadow:none}.mobileBottom button.activeArea{color:var(--brand)!important}.mobileBottom span{display:block;font-size:18px;margin-bottom:1px}.flashcard{min-height:330px}.confidenceBar{grid-template-columns:1fr}.brainSearch{display:grid;grid-template-columns:1fr auto}.kpi-line{grid-template-columns:100px 1fr 42px}}
@media(max-width:540px){.topClass{display:none}.courseShelf{grid-template-columns:1fr}.studyDock{grid-template-columns:1fr 1fr}.grid.cols-4,.grid.cols-3{grid-template-columns:1fr}.app{padding-left:11px;padding-right:11px}.hero{border-radius:20px;padding:18px}.hero h2{font-size:22px}.pageHead h2{font-size:21px}.flashcard{min-height:300px;padding:28px 20px}.flashcard h2{font-size:22px}.brainHero{padding:21px 14px}.brainSearch{grid-template-columns:1fr}.brainSearch button{width:100%}}

/* NurseStudy 1.2 — Notebook + lecture studio + AI */
.notebookHeader{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:16px;padding:20px 22px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(135deg,var(--brandSoft),color-mix(in srgb,var(--brand2) 8%,var(--surface)))}
.notebookHeader h2{font-size:25px;margin:7px 0 3px}.notebookHeader p{margin:0;color:var(--muted);font-size:11px;max-width:720px}.notebookShell{display:grid;grid-template-columns:240px minmax(0,1fr) 315px;gap:13px;align-items:start}.noteSidebar,.noteEditor,.lectureStudio{padding:14px;min-height:660px}.noteSidebar{position:sticky;top:82px}.lectureStudio{position:sticky;top:82px}.noteList{margin-top:9px;max-height:560px;overflow:auto}.noteListItem{width:100%;display:block;text-align:left;padding:10px;border:0;border-radius:12px;background:transparent;color:var(--ink);box-shadow:none;margin:2px 0}.noteListItem:hover,.noteListItem.active{background:var(--surface2);box-shadow:none}.noteListItem.active{outline:1px solid color-mix(in srgb,var(--brand) 28%,var(--line))}.noteListItem b{font-size:10px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.noteListItem span{font-size:8px;color:var(--brand);display:block;margin:3px 0}.noteListItem em{display:block;font-style:normal;color:var(--muted);font-size:8px;line-height:1.35}.noteEditor{padding:18px}.noteEditorHead{border-bottom:1px solid var(--line);padding-bottom:11px;margin-bottom:11px}.noteTitleInput{font-size:22px;font-weight:850;border:0;padding:10px 0 7px;background:transparent;border-radius:0;box-shadow:none!important}.noteTitleInput:focus{border:0;box-shadow:none}.noteToolbar{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}.notebookTextarea{min-height:515px;border:0;background:transparent;padding:8px 2px;font-size:12px;line-height:1.75;resize:vertical;border-radius:0;box-shadow:none!important;font-family:inherit}.notebookTextarea:focus{border:0;box-shadow:none}.noteHint{padding-top:10px;border-top:1px solid var(--line);font-size:9px;color:var(--muted)}.notebookEmpty{min-height:560px;display:grid;place-content:center}.recordButton{width:100%;padding:13px;margin:10px 0;background:linear-gradient(135deg,var(--brand),var(--brand2));font-size:11px}.recordingLive{display:flex;gap:12px;align-items:center;padding:14px;border-radius:14px;background:color-mix(in srgb,var(--bad) 7%,var(--surface));border:1px solid color-mix(in srgb,var(--bad) 24%,var(--line));margin:7px 0 10px}.recordingPulse{width:12px;height:12px;border-radius:50%;background:var(--bad);box-shadow:0 0 0 0 color-mix(in srgb,var(--bad) 45%,transparent);animation:recPulse 1.5s infinite}.recordingTimer{font-size:20px;font-weight:900;font-variant-numeric:tabular-nums;margin-top:2px}@keyframes recPulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--bad) 45%,transparent)}70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}.recordingDivider{height:1px;background:var(--line);margin:16px 0}.recordingList{display:grid;gap:8px;max-height:390px;overflow:auto}.recordingCard{padding:10px;border-radius:13px;background:var(--surface2);border:1px solid var(--line)}.recordingCard b{font-size:10px}.recordingCard span{font-size:8px;color:var(--muted);display:block;margin-top:2px}.recordingCard>.row>.pill{display:inline-flex;color:var(--brand);margin:0}.recordingActions{display:flex;gap:5px;flex-wrap:wrap;margin-top:8px}.recordingActions button{font-size:8px;padding:5px 7px}.audioPart{padding:10px;background:var(--surface2);border:1px solid var(--line);border-radius:12px}.audioPart b{display:block;font-size:9px;margin-bottom:6px}.audioPart audio{width:100%}.smallEmpty{padding:15px}.wideBtn{width:100%}

.aiWorkspace{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:14px;align-items:start}.aiMain{padding:0;overflow:hidden;min-height:650px;display:grid;grid-template-rows:auto minmax(370px,1fr) auto auto}.aiHeader{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;padding:20px 21px;border-bottom:1px solid var(--line);background:linear-gradient(135deg,var(--brandSoft),transparent)}.aiHeader h2{font-size:23px;margin:7px 0 3px}.aiHeader p{font-size:10px;color:var(--muted);max-width:700px;margin:0}.aiMessages{padding:19px;overflow:auto;max-height:62vh;min-height:390px}.aiWelcome{height:100%;min-height:330px;display:grid;place-content:center;text-align:center;color:var(--muted)}.aiWelcome h3{font-size:18px;color:var(--ink);margin:6px 0}.aiWelcome p{font-size:10px;max-width:430px}.aiSpark{width:50px;height:50px;border-radius:17px;display:grid;place-items:center;background:var(--brandSoft);color:var(--brand);font-size:23px;margin:0 auto}.aiMessage{display:grid;grid-template-columns:30px minmax(0,1fr);gap:9px;margin:12px 0;align-items:start}.aiMessage.user{grid-template-columns:minmax(0,1fr) 30px}.aiMessage.user .aiAvatar{grid-column:2}.aiMessage.user .aiBubble{grid-column:1;grid-row:1;justify-self:end;background:var(--brand);color:white;border-color:var(--brand);max-width:82%}.aiAvatar{width:30px;height:30px;border-radius:10px;background:var(--brandSoft);display:grid;place-items:center;color:var(--brand);font-weight:850;font-size:9px}.aiBubble{padding:11px 13px;border:1px solid var(--line);background:var(--surface2);border-radius:14px;max-width:92%;font-size:10px;line-height:1.55}.aiBubble p{margin:0 0 8px}.aiBubble p:last-child{margin-bottom:0}.aiBubble ul{margin:4px 0 8px;padding-left:18px}.aiBubble li{margin:3px 0}.aiBubble h3,.aiBubble h4{font-size:12px;margin:9px 0 4px}.aiBubble code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:color-mix(in srgb,var(--ink) 7%,transparent);padding:1px 4px;border-radius:5px}.aiComposer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;padding:12px 16px;border-top:1px solid var(--line);background:var(--surface)}.aiComposer textarea{min-height:54px;max-height:150px;resize:vertical}.aiComposer button{align-self:stretch;min-width:78px}.aiComposerFoot{display:flex;justify-content:space-between;gap:10px;padding:0 17px 12px;color:var(--muted);font-size:8px}.aiContext{padding:16px;position:sticky;top:82px}.aiContext .checkitem{padding:8px 0;border-bottom:1px solid var(--line)}.aiContext .checkitem:last-of-type{border-bottom:0}

@media(max-width:1220px){.notebookShell{grid-template-columns:210px minmax(0,1fr)}.lectureStudio{grid-column:1/-1;position:static;min-height:auto}.recordingList{grid-template-columns:repeat(2,minmax(0,1fr));max-height:none}.aiWorkspace{grid-template-columns:minmax(0,1fr) 240px}}
@media(max-width:820px){.notebookHeader{align-items:flex-start;flex-direction:column}.notebookShell,.aiWorkspace{grid-template-columns:1fr}.noteSidebar,.lectureStudio,.aiContext{position:static;min-height:auto}.noteSidebar{order:2}.noteEditor{order:1;min-height:580px}.lectureStudio{order:3}.noteList{max-height:250px}.notebookTextarea{min-height:420px}.recordingList{grid-template-columns:1fr}.aiContext{order:-1}.aiMain{min-height:620px}.aiMessages{max-height:none}.aiComposerFoot{display:block}.aiComposerFoot span{display:block;margin-top:4px}}
@media(max-width:540px){.notebookHeader{padding:16px}.notebookHeader h2{font-size:21px}.noteEditor{padding:13px}.noteTitleInput{font-size:19px}.notebookTextarea{min-height:360px;font-size:11px}.noteToolbar button{font-size:8px;padding:5px 6px}.aiHeader{padding:16px}.aiHeader h2{font-size:20px}.aiHeader>button{display:none}.aiMessages{padding:12px}.aiComposer{grid-template-columns:1fr}.aiMessage.user .aiBubble{max-width:94%}}

/* NurseStudy 1.3 free cloud sync */
.syncChip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:999px;padding:7px 10px;font-size:12px;font-weight:750;color:var(--muted);background:var(--card)}
.syncChip::before{content:'';width:7px;height:7px;border-radius:50%;background:#98a2b3}.syncChip[data-state="synced"]::before{background:#16a36a}.syncChip[data-state="syncing"]::before{background:#6657d9;animation:syncPulse 1s infinite}.syncChip[data-state="offline"]::before{background:#d97836}@keyframes syncPulse{50%{opacity:.3}}
@media(max-width:760px){.syncChip{font-size:10px;padding:6px 8px}.top .actions{gap:6px}}


/* NurseStudy 1.4 — readability, True Dark, material inbox, textbook library */
body[data-theme="true-dark"]{--bg:#07090d;--surface:#0d1117;--surface2:#111720;--surface3:#171e29;--ink:#dce2ea;--muted:#8d98a8;--line:#202936;--brand:#8277d8;--brand2:#3a9e93;--brandSoft:#17152a;--coral:#c96d78;--amber:#c2934e;--blue:#6d8fc5;--good:#4ca98e;--bad:#ce6f7a;--shadow:0 14px 34px rgba(0,0,0,.38);--shadow2:0 22px 58px rgba(0,0,0,.48);--rail:#090c11}
body[data-theme="true-dark"] .top{background:color-mix(in srgb,#07090d 94%,transparent)}
body[data-theme="true-dark"] .hero,body[data-theme="true-dark"] .notebookHeader,body[data-theme="true-dark"] .aiHeader,body[data-theme="true-dark"] .textbookHero{background:linear-gradient(135deg,#0d1117,#10151d)}
body[data-theme="true-dark"] .hero:after{opacity:.28}body[data-theme="true-dark"] .courseCover{background:linear-gradient(135deg,color-mix(in srgb,var(--course,#6657d9) 46%,#090c11),color-mix(in srgb,var(--course,#6657d9) 24%,#111720))}
body[data-theme="true-dark"] .brandMark{box-shadow:none}.theme-toggle{background:var(--surface2)}

body[data-font-size="comfortable"]{--ns-base:16px;--ns-control:14px;--ns-secondary:13px;--ns-small:12px;--ns-micro:11px}
body[data-font-size="large"]{--ns-base:17px;--ns-control:15px;--ns-secondary:14px;--ns-small:13px;--ns-micro:12px}
body[data-font-size="xl"]{--ns-base:18.5px;--ns-control:16.5px;--ns-secondary:15.5px;--ns-small:14px;--ns-micro:13px}
body{font-size:var(--ns-base,17px);line-height:1.55}.btn,button,input,select,textarea{font-size:var(--ns-control,15px)}
.nav-btn{font-size:var(--ns-secondary,14px);padding:11px 12px}.nav-btn span{font-size:18px}.navGroupLabel{font-size:var(--ns-micro,12px)}.railFoot,.brandTag{font-size:var(--ns-small,13px)}.railFoot b{font-size:var(--ns-secondary,14px)}
.crumb,.pageHead p,.section-title p,.hero p,.paneHead p,.courseMeta,.sourceInfo span,.labAction span,.noteHint,.aiHeader p,.aiWelcome p,.aiComposerFoot,.recordingCard span,.bookMeta,.importMethod p,.textbookPolicy{font-size:var(--ns-small,13px)}
.small{font-size:var(--ns-small,13px)!important}.kicker,.pill,.badge,.courseCover .courseLabel{font-size:var(--ns-micro,12px)}.btn.small,.sourceActions button,.recordingActions button,.noteToolbar .btn.small{font-size:var(--ns-small,13px)}
.section-title h2{font-size:22px}.paneHead h3{font-size:18px}.studyAction b,.sourceDrop b,.sourceInfo b,.labAction b,.notePreview b,.recordingCard b{font-size:var(--ns-secondary,14px)}
.studyAction span{font-size:var(--ns-small,13px)}.miniStat span,.stat span,.courseCounts span{font-size:var(--ns-micro,12px)}.miniStat b{font-size:19px}.courseCover h3{font-size:21px}.workspaceHero h2{font-size:28px}
label{font-size:var(--ns-small,13px);line-height:1.35}th,td{font-size:var(--ns-secondary,14px);line-height:1.45}th{font-size:var(--ns-micro,12px)}.callout,.list-item,.choice,.empty,.note-box,.card p{line-height:1.58}
.notebookHeader p{font-size:var(--ns-small,13px)}.noteListItem b{font-size:var(--ns-secondary,14px)}.noteListItem span,.noteListItem em{font-size:var(--ns-micro,12px)}.notebookTextarea{font-size:var(--ns-base,17px);line-height:1.8}.noteTitleInput{font-size:27px}
.aiBubble{font-size:var(--ns-secondary,14px);line-height:1.65}.aiBubble h3,.aiBubble h4{font-size:17px}.aiAvatar{font-size:var(--ns-micro,12px)}

.materialDrop{min-height:210px;padding:26px 20px;border-width:2px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;transition:border-color .15s,background .15s,transform .15s}.materialDrop.dragging{border-color:var(--brand);background:var(--brandSoft);transform:scale(1.008)}.uploadIcon{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:var(--brandSoft);color:var(--brand);font-size:25px;font-weight:900}.materialDrop p{max-width:500px;margin:0;color:var(--muted);font-size:var(--ns-small,13px);line-height:1.5}.uploadButtons{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:5px}.materialHelp{display:block;max-width:520px;color:var(--muted);font-size:var(--ns-micro,12px);line-height:1.45;margin-top:3px}.sourceTitleRow{gap:7px;align-items:center;flex-wrap:nowrap}.sourceTitleRow b{min-width:0}.sourceKind{display:inline-flex!important;flex:0 0 auto;padding:3px 6px;border:1px solid var(--line);border-radius:999px;background:var(--surface2);font-size:var(--ns-micro,12px)!important;color:var(--muted)}.textbookSource .sourceIcon{background:color-mix(in srgb,var(--brand2) 13%,var(--surface2));color:var(--brand2)}

.textbookHero{border:1px solid var(--line);border-radius:24px;padding:24px;background:linear-gradient(135deg,var(--brandSoft),color-mix(in srgb,var(--brand2) 8%,var(--surface)));display:flex;justify-content:space-between;gap:24px;align-items:flex-end}.textbookHero h2{font-size:29px;line-height:1.18;margin:8px 0}.textbookHero p{margin:0;max-width:820px;color:var(--muted);font-size:var(--ns-secondary,14px);line-height:1.6}.importMethods{margin-top:16px}.importMethod{position:relative}.methodIcon{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:var(--brandSoft);color:var(--brand);font-weight:900;margin-bottom:11px}.importMethod h3{font-size:18px;margin-bottom:7px}.textbookPolicy{margin:14px 0 4px;padding:13px 15px;border:1px solid var(--line);border-radius:14px;background:var(--surface2);color:var(--muted);line-height:1.5}.textbookPolicy b{color:var(--ink)}.textbookShelf{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.textbookCard{padding:0;display:grid;grid-template-columns:9px minmax(0,1fr);overflow:hidden}.textbookSpine{background:linear-gradient(var(--brand),var(--brand2))}.bookBody{padding:18px}.bookBody h3{font-size:21px;margin:10px 0 6px}.bookBody>p{color:var(--muted);margin:0 0 13px}.bookMeta{display:grid;gap:4px;color:var(--muted);margin:12px 0 16px}.importChoice{padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--surface2)}.importChoice b{display:block;margin-bottom:4px}.importChoice p{color:var(--muted);font-size:var(--ns-small,13px);margin:0 0 10px}.orDivider{text-align:center;color:var(--muted);font-size:var(--ns-small,13px);font-weight:800}.textbookSources .sourceItem{padding:13px 0}

@media(max-width:1050px){.textbookShelf{grid-template-columns:1fr 1fr}.textbookHero{align-items:flex-start;flex-direction:column}}
@media(max-width:820px){.textbookShelf{grid-template-columns:1fr}.materialDrop{min-height:190px}.uploadButtons{width:100%}.uploadButtons button{flex:1 1 160px}.textbookHero h2{font-size:25px}}
@media(max-width:540px){body{--ns-base:16.5px;--ns-control:14.5px;--ns-secondary:13.5px;--ns-small:12.5px;--ns-micro:11.5px}.notebookTextarea{font-size:var(--ns-base)!important}.noteTitleInput{font-size:24px!important}.noteToolbar button{font-size:var(--ns-small)!important}.top .actions #materialInboxBtn{font-size:0;padding:9px 10px}.top .actions #materialInboxBtn:after{content:"⇧";font-size:17px}.textbookHero{padding:18px}.textbookHero h2{font-size:23px}.importMethods{grid-template-columns:1fr!important}}