:root{--bg:#f0f9ff;--bg2:#e0f2fe;--card:#fff;--text:#1e293b;--muted:#64748b;--pri:#0ea5e9;--pri2:#6366f1;--ok:#16a34a;--okbg:#dcfce7;--bad:#dc2626;--badbg:#fee2e2;--line:#bae6fd;--hint:#fef9c3;--sh:0 8px 24px rgba(14,116,144,.13)}
.dark{--bg:#0f172a;--bg2:#1e293b;--card:#1e293b;--text:#e2e8f0;--muted:#94a3b8;--line:#334155;--okbg:#14532d;--badbg:#7f1d1d;--ok:#4ade80;--bad:#f87171;--hint:#3f3a16;--sh:0 8px 24px rgba(0,0,0,.4)}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:linear-gradient(180deg,var(--bg2),var(--bg) 420px) no-repeat,var(--bg);color:var(--text);min-height:100vh;line-height:1.45}
.wrap{max-width:900px;margin:auto;padding:0 14px}
.hidden{display:none!important}
.muted{color:var(--muted)}
.top{display:flex;align-items:center;justify-content:space-between;gap:8px;max-width:900px;margin:auto;padding:12px 14px;flex-wrap:wrap}
h1{font-size:1.35rem;margin:0;font-weight:900;cursor:pointer}h1 span{color:var(--pri)}
.tools{display:flex;gap:6px;flex-wrap:wrap}
.btn{border:0;border-radius:12px;padding:10px 16px;font:inherit;font-weight:700;cursor:pointer;background:var(--card);color:var(--text);box-shadow:var(--sh);transition:transform .08s}
.btn:active{transform:scale(.96)}.btn.sm{padding:7px 11px;font-size:.88rem}
.btn.pri{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff}
.link{background:none;border:0;color:var(--pri);cursor:pointer;font:inherit;text-decoration:underline;padding:0}
.tracks{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 8px;scrollbar-width:thin}
.tab{flex:0 0 auto;border:2px solid transparent;background:var(--card);color:var(--text);border-radius:14px;padding:9px 14px;font:inherit;font-weight:800;cursor:pointer;box-shadow:var(--sh)}
.tab.on{border-color:var(--pri);background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff}
.desc{margin:4px 2px 8px}
.stats{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.stat{background:var(--card);border-radius:12px;padding:8px 12px;box-shadow:var(--sh);font-size:.9rem}.stat b{font-size:1.1rem;color:var(--pri)}
.filters input{width:100%;padding:12px 14px;border-radius:12px;border:2px solid var(--line);background:var(--card);color:var(--text);font:inherit;font-size:1rem}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.chip{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:999px;padding:5px 11px;font:inherit;font-size:.86rem;cursor:pointer}
.chip.on{background:var(--pri);border-color:var(--pri);color:#fff}
details.group{background:var(--card);border-radius:16px;box-shadow:var(--sh);margin:12px 0;padding:4px 12px 10px}
details.group summary{cursor:pointer;font-weight:900;padding:10px 2px;list-style:none;display:flex;justify-content:space-between;gap:8px}
details.group summary::-webkit-details-marker{display:none}
details.group summary:after{content:"▾";color:var(--muted)}details.group:not([open]) summary:after{content:"▸"}
.gmeta{font-weight:600;color:var(--muted);font-size:.85rem;margin-left:auto}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.lcard{text-align:left;border:2px solid var(--line);background:var(--bg);color:var(--text);border-radius:14px;padding:10px 12px;font:inherit;cursor:pointer;display:flex;flex-direction:column;gap:6px;min-height:92px}
.lcard:hover{border-color:var(--pri)}
.lcard .t{font-weight:800;font-size:.95rem}
.lcard .m{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-top:auto;font-size:.78rem}
.badge{border-radius:999px;padding:2px 8px;font-weight:700;font-size:.75rem;background:var(--bg2);color:var(--muted)}
.badge.done{background:var(--okbg);color:var(--ok)}.badge.todo{background:var(--bg2);color:var(--muted)}
.lcard.done{border-color:color-mix(in srgb,var(--ok) 45%,var(--line))}
.empty{text-align:center;padding:30px;color:var(--muted)}
.missed{background:var(--card);border-radius:14px;padding:10px 12px;box-shadow:var(--sh);display:flex;align-items:center;justify-content:space-between;gap:8px;margin:8px 0}
.qbar{display:flex;align-items:center;gap:8px;margin:6px 0}
.qtitle{flex:1;font-weight:800;font-size:.95rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.score{font-weight:800;white-space:nowrap}
.progress{height:8px;background:var(--line);border-radius:9px;overflow:hidden;margin-bottom:10px}
.progress div{height:100%;width:0;background:linear-gradient(90deg,var(--pri),var(--pri2));transition:width .3s}
.card{background:var(--card);border-radius:18px;box-shadow:var(--sh);padding:16px}
.qhead{display:flex;justify-content:space-between;font-size:.85rem}
.kind{background:var(--bg2);border-radius:999px;padding:2px 10px;font-weight:700;color:var(--pri)}
.question{font-size:1.2rem;font-weight:700;margin:12px 0}
.question u{text-decoration-thickness:2px;text-underline-offset:3px}.question sub{color:var(--pri);font-weight:900;margin:0 2px}
.qtools{display:flex;gap:8px;margin-bottom:8px}
.hint{background:var(--hint);border-radius:12px;padding:9px 12px;margin:6px 0 10px}
.opts{display:grid;gap:9px}
.opt{display:flex;gap:10px;align-items:center;text-align:left;border:2px solid var(--line);background:var(--bg);color:var(--text);border-radius:14px;padding:12px 14px;font:inherit;font-size:1.02rem;cursor:pointer;min-height:52px}
.opt:hover:not(:disabled){border-color:var(--pri)}
.opt .n{flex:0 0 26px;height:26px;border-radius:50%;background:var(--bg2);display:grid;place-items:center;font-weight:900;font-size:.85rem}
.opt.ok{border-color:var(--ok);background:var(--okbg)}.opt.bad{border-color:var(--bad);background:var(--badbg)}
.opt:disabled{cursor:default}
.feedback{margin-top:12px;border-radius:12px;padding:10px 12px;background:var(--bg2)}
.feedback.ok{background:var(--okbg)}.feedback.bad{background:var(--badbg)}
#nextBtn{margin-top:12px;width:100%}
.keys{font-size:.8rem;text-align:center}
.res h2{margin:6px 0}.big{font-size:3rem;text-align:center}
.res .acts{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.rv{border-left:4px solid var(--bad);background:var(--bg);border-radius:10px;padding:8px 12px;margin:8px 0;font-size:.95rem}
.rv .a{color:var(--ok);font-weight:800}
.foot{font-size:.8rem;color:var(--muted);margin-top:30px;padding-bottom:30px}
.pop{animation:pop .35s}@keyframes pop{50%{transform:scale(1.03)}}
.shake{animation:shake .35s}@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
@media (max-width:560px){.question{font-size:1.08rem}.cards{grid-template-columns:1fr 1fr}.lcard{min-height:84px;padding:9px}.lcard .t{font-size:.88rem}h1{font-size:1.15rem}}
.passage{font-size:.92em;line-height:1.55;background:var(--chip,rgba(127,127,127,.08));border-left:4px solid #6b8afd;padding:10px 12px;border-radius:8px;margin:0 0 10px;max-height:40vh;overflow:auto;font-weight:400}