:root{
  --bg:#0f1218;--panel:#171b23;--panel2:#1e2430;--text:#f4f6f9;--muted:#aeb7c4;
  --line:#2b3340;--accent:#b3000c;--accent2:#df2733;--good:#2fa36b;--warn:#d79b29;--bad:#d84a4a;
  --shadow:0 12px 30px rgba(0,0,0,.22);--radius:18px;--top:64px;--bottom:70px;
}
html.light{--bg:#f4f6f8;--panel:#fff;--panel2:#f8fafc;--text:#17202a;--muted:#667382;--line:#e3e7ec;--shadow:0 10px 28px rgba(25,35,45,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Noto Sans Devanagari","Segoe UI",sans-serif;line-height:1.55}
a{color:inherit}.hidden{display:none!important}button,input,select,textarea{font:inherit}.topbar{height:var(--top);position:fixed;top:0;left:0;right:0;z-index:40;display:flex;align-items:center;gap:12px;padding:8px 16px;background:color-mix(in srgb,var(--panel) 92%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-badge{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:var(--accent);color:#fff;font-weight:800;font-size:13px;letter-spacing:.5px}.brand strong{display:block;font-size:15px}.brand small{display:block;color:var(--muted);font-size:11px}.top-actions{margin-left:auto;display:flex;gap:8px}.icon-btn,.mini-btn,.chip,.ghost-btn,.primary-btn,.danger-btn{border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:12px;cursor:pointer}.icon-btn{width:42px;height:42px}.mini-btn{padding:8px 11px}.primary-btn{background:var(--accent);border-color:var(--accent);color:#fff;padding:11px 16px;font-weight:700}.ghost-btn{padding:10px 14px}.danger-btn{padding:10px 14px;background:color-mix(in srgb,var(--bad) 15%,var(--panel));border-color:color-mix(in srgb,var(--bad) 45%,var(--line));color:var(--text)}
.app-shell{display:flex;min-height:100vh;padding-top:var(--top)}.sidebar{width:264px;position:fixed;top:var(--top);bottom:0;left:0;background:var(--panel);border-right:1px solid var(--line);padding:14px;overflow:auto;z-index:35}.sidebar nav{display:grid;gap:6px}.nav-group{margin:12px 8px 5px;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.08em}.nav-btn{display:flex;align-items:center;gap:11px;width:100%;padding:11px 12px;border-radius:12px;border:0;background:transparent;color:var(--text);text-align:left;cursor:pointer}.nav-btn:hover,.nav-btn.active{background:var(--panel2)}.nav-btn .nicon{width:24px;text-align:center;color:var(--muted)}.sidebar-footer{margin-top:18px;padding:12px;border-top:1px solid var(--line);display:flex;gap:9px;align-items:center}.sidebar-footer small{display:block;color:var(--muted);font-size:11px}.status-dot{width:9px;height:9px;background:var(--good);border-radius:50%}.main{margin-left:264px;width:calc(100% - 264px);padding:24px 28px 96px;max-width:1300px}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px}.page-head h1{font-size:27px;margin:0 0 5px}.page-head p{margin:0;color:var(--muted)}
.notice{border:1px solid color-mix(in srgb,var(--warn) 50%,var(--line));background:color-mix(in srgb,var(--warn) 10%,var(--panel));padding:13px 15px;border-radius:14px;margin:12px 0}.notice strong{display:block;margin-bottom:3px}.notice small{color:var(--muted)}
.grid{display:grid;gap:14px}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:17px;box-shadow:var(--shadow)}.card h2,.card h3{margin:0 0 8px}.card p{margin:5px 0;color:var(--muted)}.stat strong{display:block;font-size:26px;line-height:1.1}.stat span{color:var(--muted);font-size:12px}.stat .sub{margin-top:8px;font-size:12px}.accent{color:var(--accent2)}.good{color:var(--good)}.warn{color:var(--warn)}.bad{color:var(--bad)}
.section-title{display:flex;align-items:center;justify-content:space-between;margin:25px 0 10px}.section-title h2{font-size:19px;margin:0}.section-title small{color:var(--muted)}.progress{height:9px;background:var(--panel2);border-radius:999px;overflow:hidden;border:1px solid var(--line)}.progress>span{height:100%;display:block;background:var(--accent);border-radius:999px}.subject-card{cursor:pointer;transition:.18s transform,.18s border}.subject-card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.subject-top{display:flex;justify-content:space-between;gap:8px;align-items:flex-start}.subject-top h3{font-size:16px}.badge{display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;font-size:10px;border:1px solid var(--line);background:var(--panel2);color:var(--muted)}.badge.official{border-color:color-mix(in srgb,var(--good) 50%,var(--line));color:var(--good)}.topic-count{font-size:12px;color:var(--muted)}
.list{display:grid;gap:9px}.list-row{display:flex;align-items:flex-start;gap:12px;padding:12px;border:1px solid var(--line);border-radius:13px;background:var(--panel2)}.list-row .grow{flex:1;min-width:0}.list-row h4{margin:0 0 3px}.list-row p{margin:0;color:var(--muted);font-size:13px}.check{width:24px;height:24px;border:1px solid var(--line);border-radius:8px;background:var(--panel);display:grid;place-items:center;flex:0 0 auto;cursor:pointer}.check.done{background:var(--good);border-color:var(--good);color:#fff}.star{border:0;background:transparent;color:var(--muted);font-size:21px;cursor:pointer;padding:0 2px}.star.on{color:#f2b84b}.topic-link{cursor:pointer}.topic-link:hover h4{color:var(--accent2)}
.topic-hero{display:flex;gap:12px;align-items:flex-start}.topic-hero .back{flex:0 0 auto}.topic-meta{display:flex;gap:8px;flex-wrap:wrap;margin:9px 0}.topic-body{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px}.topic-content ul{padding-left:22px}.topic-content li{margin:9px 0}.study-note{width:100%;min-height:160px;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--panel2);color:var(--text);resize:vertical}.side-box{position:sticky;top:85px}.quick-actions{display:grid;gap:8px}.quick-actions button{width:100%}.source-line{padding:10px 12px;border-radius:10px;background:var(--panel2);border:1px solid var(--line);font-size:12px;color:var(--muted)}
.search-box{display:flex;gap:8px;position:sticky;top:73px;z-index:10;background:var(--bg);padding:4px 0 12px}.search-box input{flex:1;padding:13px 14px;border-radius:13px;border:1px solid var(--line);background:var(--panel);color:var(--text);outline:none}.search-results{display:grid;gap:10px}.result-card{padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--panel);cursor:pointer}.result-card small{color:var(--muted)}.highlight{background:color-mix(in srgb,var(--warn) 35%,transparent);border-radius:3px}
.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.chip{padding:8px 11px}.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.quiz-card{max-width:760px;margin:0 auto}.qno{font-size:12px;color:var(--muted)}.question{font-size:20px;font-weight:700;margin:8px 0 16px}.options{display:grid;gap:9px}.option{padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel2);cursor:pointer;text-align:left;color:var(--text)}.option:hover{border-color:var(--accent2)}.option.correct{border-color:var(--good);background:color-mix(in srgb,var(--good) 15%,var(--panel2))}.option.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 12%,var(--panel2))}.explain{margin-top:14px;padding:13px;border-radius:12px;background:var(--panel2);border:1px solid var(--line)}.quiz-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:14px}.score-pill{padding:7px 10px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);font-size:12px}.timer{font-variant-numeric:tabular-nums;font-weight:800}.quiz-setup{max-width:700px}.form-row{display:grid;gap:5px;margin:12px 0}.form-row label{font-size:12px;color:var(--muted)}.form-row select,.form-row input{padding:11px;border-radius:11px;border:1px solid var(--line);background:var(--panel2);color:var(--text)}
.week-card h3{font-size:15px}.week-card ol{padding-left:20px;margin:8px 0}.week-card li{margin:5px 0;color:var(--muted)}.case-card{display:grid;gap:5px}.case-card h3{font-size:15px}.case-card p{font-size:13px}.case-area{font-size:10px;color:var(--accent2);text-transform:uppercase;letter-spacing:.08em}.link-list{display:grid;gap:9px}.source-link{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--panel2);text-decoration:none}.source-link:hover{border-color:var(--accent2)}.source-link small{color:var(--muted)}
.revision-due{border-left:4px solid var(--warn)}.revision-ok{border-left:4px solid var(--good)}.empty{padding:28px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:14px}.toast{position:fixed;left:50%;bottom:88px;transform:translate(-50%,20px);padding:10px 14px;border-radius:12px;background:#111;color:#fff;opacity:0;pointer-events:none;transition:.2s;z-index:100;max-width:90%;font-size:13px}.toast.show{opacity:1;transform:translate(-50%,0)}
.bottom-nav{display:none}.settings-grid{display:grid;gap:12px}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--panel2)}.switch-row input{width:20px;height:20px}.small-muted{font-size:12px;color:var(--muted)}
@media(max-width:1000px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-body{grid-template-columns:1fr}.side-box{position:static}}
@media(max-width:760px){:root{--top:58px;--bottom:72px}.topbar{padding:7px 10px}.brand-badge{width:38px;height:38px}.brand strong{font-size:14px}.brand small{font-size:10px}.sidebar{transform:translateX(-105%);transition:.2s;width:285px;box-shadow:var(--shadow)}.sidebar.open{transform:translateX(0)}.main{margin-left:0;width:100%;padding:16px 12px 90px}.page-head h1{font-size:23px}.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}.bottom-nav{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);height:var(--bottom);background:color-mix(in srgb,var(--panel) 94%,transparent);border-top:1px solid var(--line);z-index:45;padding-bottom:env(safe-area-inset-bottom);backdrop-filter:blur(12px)}.bottom-nav button{border:0;background:transparent;color:var(--muted);display:grid;place-items:center;align-content:center;gap:2px}.bottom-nav button span{font-size:20px;line-height:1}.bottom-nav button small{font-size:10px}.bottom-nav button.active{color:var(--accent2)}.top-actions .mini-btn{display:none}.card{padding:14px;border-radius:15px}.section-title{margin-top:21px}.topic-hero{align-items:center}.topic-body{display:block}.side-box{margin-top:14px}.search-box{top:64px}.question{font-size:18px}.quiz-footer{align-items:stretch;flex-direction:column}.quiz-footer .primary-btn{width:100%}}
@media(min-width:761px){#menuBtn{display:none}}