[hidden]{display:none!important}
:root{
  --bg:#f5f6fb; --panel:#ffffff; --panel-2:#f0f2f9; --ink:#171a2b; --ink-2:#4a5070; --ink-3:#8a8fa8;
  --line:#e3e6f0; --brand:#4f46e5; --brand-2:#6d63ff; --brand-soft:#eceafe;
  --xp:#f59e0b; --xp-soft:#fff4dc; --ok:#16a34a; --ok-soft:#e5f7ec; --bad:#dc2626; --bad-soft:#fdeaea;
  --c10:#0ea5e9; --c12:#8b5cf6; --shadow:0 1px 2px rgba(20,24,60,.05),0 6px 20px rgba(20,24,60,.06);
  --r:14px; --font:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0f1120; --panel:#171a2e; --panel-2:#1f2340; --ink:#eef0ff; --ink-2:#b6bad6; --ink-3:#7c81a3;
  --line:#2a2f52; --brand:#7c73ff; --brand-2:#968fff; --brand-soft:#262a55; --xp-soft:#3a2d10; --ok-soft:#10301f; --bad-soft:#3a1616;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25); color-scheme:dark;
}}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 var(--font)}
a{color:var(--brand)}
button{font:inherit;cursor:pointer}
#app{display:flex;min-height:100vh}
.sidebar{width:236px;flex:none;background:var(--panel);border-right:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:16px;position:sticky;top:0;height:100vh}
.brand{display:flex;gap:10px;align-items:center;padding:4px 6px}
.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brand),#ec4899);color:#fff;display:grid;place-items:center;font-weight:800;font-size:20px}
.brand-name{font-weight:800;font-size:17px;letter-spacing:-.2px}
.brand-sub{font-size:12px;color:var(--ink-3)}
.class-switch{display:grid;grid-template-columns:1fr 1fr;background:var(--panel-2);border-radius:10px;padding:3px}
.class-switch button{border:0;background:transparent;padding:7px;border-radius:8px;color:var(--ink-2);font-weight:600}
.class-switch button.on{background:var(--panel);color:var(--ink);box-shadow:var(--shadow)}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;gap:10px;align-items:center;padding:9px 10px;border-radius:10px;color:var(--ink-2);text-decoration:none;font-weight:500}
.nav a:hover{background:var(--panel-2)}
.nav a.on{background:var(--brand-soft);color:var(--brand);font-weight:700}
.nav .ico{width:20px;text-align:center;opacity:.85}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.admin-link{font-size:12px;color:var(--ink-3);text-decoration:none;padding:0 8px}
.mini-level{background:var(--panel-2);border-radius:12px;padding:10px 12px;font-size:12px}
.main-wrap{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:12px;padding:14px 28px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(8px);position:sticky;top:0;z-index:5}
.menu-btn{display:none;border:0;background:var(--panel);border-radius:9px;width:36px;height:36px;font-size:18px;color:var(--ink)}
.top-title{font-weight:800;font-size:18px;letter-spacing:-.2px}
.top-stats{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:var(--panel);border:1px solid var(--line);font-weight:600;font-size:12.5px;white-space:nowrap}
.chip.xp{background:var(--xp-soft);border-color:transparent;color:#b45309}
.chip.fire{background:#ffe8e0;border-color:transparent;color:#c2410c}
@media (prefers-color-scheme:dark){.chip.xp{color:#fbbf24}.chip.fire{background:#3b1d12;color:#fb923c}}
.view{padding:24px 28px 60px;max-width:1280px;width:100%}
h1,h2,h3{margin:0;letter-spacing:-.2px}
h2{font-size:17px}
h3{font-size:15px}
.muted{color:var(--ink-3)}
.small{font-size:12.5px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow);min-width:0}
.card-h{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.btn{border:1px solid var(--line);background:var(--panel);color:var(--ink);padding:9px 14px;border-radius:10px;font-weight:600;display:inline-flex;gap:7px;align-items:center;text-decoration:none;white-space:nowrap}
.btn:hover{border-color:var(--brand)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-2)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--ink-2)}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.bad{background:var(--bad);border-color:var(--bad);color:#fff}
.btn.warn{background:var(--xp);border-color:var(--xp);color:#231a00}
.btn.sm{padding:6px 10px;font-size:12.5px;border-radius:8px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.hero{background:linear-gradient(120deg,var(--brand) 0%,#8b5cf6 55%,#ec4899 100%);color:#fff;border-radius:18px;padding:22px 24px;display:flex;gap:20px;align-items:center;flex-wrap:wrap;box-shadow:var(--shadow)}
.hero h1{font-size:24px}
.hero .sub{opacity:.9;margin-top:4px}
.hero .hero-stats{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap}
.hstat{background:rgba(255,255,255,.16);border-radius:12px;padding:10px 14px;min-width:96px}
.hstat b{display:block;font-size:22px;line-height:1.1}
.hstat span{font-size:12px;opacity:.9}
.bar{height:9px;background:var(--panel-2);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),#ec4899);border-radius:99px;transition:width .5s}
.bar.xpbar>i{background:linear-gradient(90deg,#f59e0b,#f97316)}
.bar.okbar>i{background:var(--ok)}
.stat{display:flex;flex-direction:column;gap:2px}
.stat b{font-size:24px;letter-spacing:-.5px}
.stat span{color:var(--ink-3);font-size:12.5px}
.tile{display:flex;gap:12px;align-items:flex-start;padding:14px;border-radius:12px;background:var(--panel-2);border:1px solid transparent;text-decoration:none;color:inherit;transition:.15s}
.tile:hover{border-color:var(--brand);transform:translateY(-1px)}
.tile .ti{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-size:19px;flex:none;color:#fff}
.tile b{display:block}
.tile span{font-size:12.5px;color:var(--ink-3)}
.subj-row{display:grid;grid-template-columns:140px 1fr 44px;gap:10px;align-items:center;padding:6px 0}
.subj-row .nm{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tag{display:inline-block;padding:2px 8px;border-radius:6px;font-size:11.5px;font-weight:700;background:var(--panel-2);color:var(--ink-2)}
.tag.mcq{background:#e0f2fe;color:#0369a1}.tag.ar{background:#ede9fe;color:#6d28d9}.tag.short{background:#dcfce7;color:#15803d}
.tag.long{background:#fee2e2;color:#b91c1c}.tag.case{background:#fef3c7;color:#b45309}.tag.vsa{background:#e0e7ff;color:#4338ca}
.tag.board{background:#dcfce7;color:#166534}
.tag.dia{background:#fce7f3;color:#be185d}.tag.hot{background:#ffedd5;color:#c2410c}
@media (prefers-color-scheme:dark){.tag.mcq,.tag.ar,.tag.short,.tag.long,.tag.case,.tag.vsa,.tag.dia,.tag.hot{background:var(--panel-2)}}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.tabs button{border:1px solid var(--line);background:var(--panel);padding:7px 12px;border-radius:999px;font-weight:600;color:var(--ink-2)}
.tabs button.on{background:var(--ink);color:var(--panel);border-color:var(--ink)}
select,input[type=text],input[type=tel],input[type=number],input[type=date],input[type=search]{font:inherit;padding:8px 10px;border-radius:9px;border:1px solid var(--line);background:var(--panel);color:var(--ink);min-width:0}
label.f{display:flex;flex-direction:column;gap:5px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.filters{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:16px}
.qcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.qcard .qh{display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding:10px 14px;border-bottom:1px solid var(--line);font-size:12.5px}
.qimg{background:#fff;padding:8px;text-align:center}
.qimg img{max-width:100%;height:auto;display:block;margin:0 auto}
@media (prefers-color-scheme:dark){.qimg{filter:invert(.92) hue-rotate(180deg)}}
.qcard .qf{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:10px 14px;border-top:1px solid var(--line)}
.ans-box{border-top:2px dashed var(--line);background:var(--ok-soft)}
.ans-box .lbl{font-size:12px;font-weight:700;color:var(--ok);padding:8px 14px 0}
.list{display:flex;flex-direction:column;gap:14px}
.paper-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.paper-row:last-child{border-bottom:0}
.paper-ico{width:40px;height:48px;border-radius:6px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:11px;flex:none}
.subj-card{cursor:pointer}
.subj-card.on{outline:2px solid var(--brand)}
.empty{padding:40px;text-align:center;color:var(--ink-3)}
.heat{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,12px);gap:3px;overflow-x:auto;padding-bottom:4px}
.heat i{width:12px;height:12px;border-radius:3px;background:var(--panel-2)}
.heat i.l1{background:#c7d2fe}.heat i.l2{background:#818cf8}.heat i.l3{background:#4f46e5}.heat i.l4{background:#312e81}
.ring{position:relative;width:120px;height:120px;flex:none}
.ring svg{transform:rotate(-90deg)}
.ring .ring-t{position:absolute;inset:0;display:grid;place-items:center;text-align:center;line-height:1.1}
.ring .ring-t b{font-size:24px}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:10px}
.badge{text-align:center;padding:10px 6px;border-radius:12px;background:var(--panel-2);font-size:11.5px;font-weight:600;color:var(--ink-3);filter:grayscale(1);opacity:.55}
.badge.got{filter:none;opacity:1;color:var(--ink);background:var(--xp-soft)}
.badge .bi{font-size:26px;display:block;margin-bottom:2px}
.arena-mode{position:relative;overflow:hidden;border-radius:16px;padding:20px;color:#fff;min-height:150px;display:flex;flex-direction:column;gap:6px;cursor:pointer;border:0;text-align:left;box-shadow:var(--shadow);transition:.15s}
.arena-mode:hover{transform:translateY(-2px)}
.arena-mode b{font-size:18px}
.arena-mode .em{font-size:30px}
.arena-mode span{opacity:.92;font-size:13px}
.quiz-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.opts{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:14px}
.opt{padding:14px;border-radius:12px;border:2px solid var(--line);background:var(--panel);font-weight:800;font-size:18px;color:var(--ink)}
.opt:hover{border-color:var(--brand)}
.opt.right{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{background:var(--bad);border-color:var(--bad);color:#fff}
.timer{font-variant-numeric:tabular-nums;font-weight:800}
.hearts{letter-spacing:2px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:var(--panel);padding:12px 18px;border-radius:12px;font-weight:600;z-index:50;box-shadow:var(--shadow);max-width:calc(100vw - 32px)}
.modal{position:fixed;inset:0;background:rgba(10,12,30,.5);display:grid;place-items:center;z-index:40;padding:16px}
.modal-card{background:var(--panel);border-radius:18px;padding:22px;max-width:560px;width:100%;max-height:90vh;overflow:auto;box-shadow:var(--shadow)}
.xp-pop{position:fixed;right:28px;top:70px;background:var(--xp);color:#231a00;font-weight:800;padding:8px 14px;border-radius:999px;z-index:60;animation:pop 1.4s ease forwards}
@keyframes pop{0%{transform:translateY(10px);opacity:0}15%{transform:none;opacity:1}80%{opacity:1}100%{transform:translateY(-20px);opacity:0}}
.chap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.chap{padding:12px;border-radius:12px;background:var(--panel-2);display:flex;flex-direction:column;gap:6px;cursor:pointer;border:1px solid transparent}
.chap:hover{border-color:var(--brand)}
.stars{color:var(--xp);letter-spacing:1px}
.stars .off{color:var(--line)}
.chk-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.status-btn{border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:700;background:var(--panel)}
.status-btn.s1{background:#fef3c7;color:#92400e;border-color:transparent}
.status-btn.s2{background:#dbeafe;color:#1e40af;border-color:transparent}
.status-btn.s3{background:var(--ok-soft);color:var(--ok);border-color:transparent}
.pomo{font-size:54px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-1px;text-align:center}
table.t{width:100%;border-collapse:collapse;font-size:13px}
table.t th,table.t td{padding:8px;border-bottom:1px solid var(--line);text-align:left}
table.t th{color:var(--ink-3);font-weight:600;font-size:12px}
.scroll-x{overflow-x:auto}
.type-row{display:grid;grid-template-columns:1fr 90px;gap:10px;align-items:center;padding:6px 0;border-bottom:1px solid var(--line)}
.type-row small{color:var(--ink-3)}
.plan-item{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:10px;background:var(--panel-2)}
.plan-item .pi{font-size:20px}
.progress-steps{display:flex;gap:4px}
.progress-steps i{flex:1;height:5px;border-radius:9px;background:var(--panel-2)}
.progress-steps i.done{background:var(--ok)}.progress-steps i.miss{background:var(--bad)}.progress-steps i.cur{background:var(--brand)}
.onb{max-width:560px;margin:40px auto}
.pill-select{display:flex;gap:8px;flex-wrap:wrap}
.pill-select button{border:1px solid var(--line);background:var(--panel);padding:8px 12px;border-radius:999px;font-weight:600;color:var(--ink-2)}
.pill-select button.on{background:var(--brand);border-color:var(--brand);color:#fff}
@media (max-width:1100px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:860px){
  .sidebar{position:fixed;left:0;top:0;z-index:30;transform:translateX(-100%);transition:.2s;box-shadow:var(--shadow)}
  .sidebar.open{transform:none}
  .menu-btn{display:grid;place-items:center}
  .g2,.g3{grid-template-columns:1fr}
  .view{padding:16px 16px 60px}
  .topbar{padding:12px 16px}
  .top-stats .chip.hide-sm{display:none}
  .opts{grid-template-columns:repeat(2,1fr)}
  .hero .hero-stats{margin-left:0}
}
@media (max-width:520px){.g4{grid-template-columns:1fr 1fr}.subj-row{grid-template-columns:100px 1fr 40px}}