:root{--bg:#f6f7fb;--surface:#fff;--text:#1a1d26;--muted:#646b7d;--border:#dfe2ea;--primary:#2563eb;--primary-text:#fff;--primary-soft:#e6eefe;--good:#15803d;--good-soft:#e3f5e9;--ok:#b45309;--ok-soft:#fdf1dc;--bad:#c62828;--bad-soft:#fde8e8;--radius:12px;--shadow:0 1px 2px #0000000d;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--surface:#181c25;--text:#e7e9ee;--muted:#9aa1b2;--border:#2b3140;--primary:#5b8cff;--primary-text:#0b0e14;--primary-soft:#1d2a47;--good:#4ade80;--good-soft:#13301f;--ok:#fbbf24;--ok-soft:#352a10;--bad:#f87171;--bad-soft:#3a1717;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}h1,h2{margin:0;line-height:1.25}h1{font-size:1.6rem}h2{font-size:1.15rem}p{margin:0}a{color:var(--primary)}.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:12px 16px}.brand{color:var(--text);align-items:center;gap:8px;font-weight:650;text-decoration:none;display:inline-flex}.container{max-width:860px;margin:0 auto;padding:24px 16px 64px}.stack{flex-direction:column;gap:16px;display:flex}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.row.nowrap{flex-wrap:nowrap}.row.spread{justify-content:space-between}.grid-2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;display:grid}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.hero{padding:16px 0}.hero h1{margin-bottom:8px;font-size:2rem}.muted{color:var(--muted)}.small-text{font-size:.875rem}.error{color:var(--bad)}.good-text{color:var(--good);font-weight:600}.bad-text{color:var(--bad);font-weight:600}input{font:inherit;color:inherit;background:var(--bg);border:1px solid var(--border);border-radius:8px;width:100%;min-width:0;padding:8px 12px}input:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--primary);outline-offset:2px}input.small{width:90px}input.tiny{text-align:right;width:72px;padding:4px 8px}input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary)}.code-input{letter-spacing:.2em;text-transform:uppercase;text-align:center;font-size:1.5rem}.field{flex-direction:column;gap:6px;display:flex}.field>span{font-size:.9rem;font-weight:600}.btn,.chip{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);text-align:center;white-space:nowrap;border-radius:8px;padding:8px 16px;text-decoration:none}.btn:hover:not(:disabled),.chip:hover{border-color:var(--primary)}.btn.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-text);font-weight:600}.btn.ghost{color:var(--primary);border-color:#0000}.btn:disabled{opacity:.55;cursor:not-allowed}.chip{border-radius:999px;padding:4px 14px}.chip.active{background:var(--primary-soft);border-color:var(--primary);color:var(--primary);font-weight:600}.big-code{letter-spacing:.15em;font-size:2.5rem;font-weight:700}.table-wrap{margin-top:8px;overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--border);padding:8px}th{text-transform:uppercase;letter-spacing:.03em;color:var(--muted);font-size:.8rem;font-weight:600}.num{text-align:right;font-variant-numeric:tabular-nums}tr.disabled td{opacity:.45}td.clickable{cursor:pointer}details>summary{cursor:pointer;font-weight:600}.sticky-bottom{z-index:5;position:sticky;bottom:12px;box-shadow:0 6px 24px #0000001f}.runner-bar{z-index:5;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;display:flex;position:sticky;top:0}.timer{font-variant-numeric:tabular-nums;font-size:1.6rem;font-weight:700}.timer.low{color:var(--bad)}.progress{background:var(--border);border-radius:2px;height:4px;margin-top:-8px;overflow:hidden}.progress>div{background:var(--primary);height:100%;transition:width .2s}.tag{background:var(--primary-soft);color:var(--primary);border-radius:999px;padding:2px 10px;font-size:.8rem;font-weight:600}.stem{white-space:pre-line;font-size:1.05rem}.question-image img{border:1px solid var(--border);border-radius:8px;max-width:100%;max-height:420px;display:block}.options{flex-direction:column;gap:8px;display:flex}.option{font:inherit;color:inherit;text-align:left;border:1px solid var(--border);background:var(--surface);border-radius:10px;align-items:flex-start;gap:12px;padding:12px 14px;display:flex}button.option{cursor:pointer}button.option:hover{border-color:var(--primary)}.option.selected{border-color:var(--primary);background:var(--primary-soft)}.option.correct{border-color:var(--good);background:var(--good-soft)}.option.wrong{border-color:var(--bad);background:var(--bad-soft)}.option-letter{border:1px solid var(--border);background:var(--bg);border-radius:50%;flex:none;place-items:center;width:26px;height:26px;font-size:.85rem;font-weight:700;display:grid}.option.selected .option-letter{background:var(--primary);border-color:var(--primary);color:var(--primary-text)}.option.correct .option-letter{background:var(--good);border-color:var(--good);color:var(--surface)}.option.wrong .option-letter{background:var(--bad);border-color:var(--bad);color:var(--surface)}.navigator{grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:6px;display:grid}.navigator button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);border-radius:6px;padding:6px 0;font-size:.85rem}.navigator button.answered{background:var(--primary-soft);border-color:var(--primary-soft)}.navigator button.current{border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary)}.result-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;display:flex}.score{font-variant-numeric:tabular-nums;font-size:3.5rem;font-weight:800;line-height:1.1}.score.good{color:var(--good)}.score.ok{color:var(--ok)}.score.bad{color:var(--bad)}.result-stats{gap:24px;display:flex}.result-stats>div{flex-direction:column;display:flex}.result-stats strong{font-variant-numeric:tabular-nums;font-size:1.4rem}.score-pill{border-radius:999px;padding:2px 10px;font-weight:700}.score-pill.good{background:var(--good-soft);color:var(--good)}.score-pill.ok{background:var(--ok-soft);color:var(--ok)}.score-pill.bad{background:var(--bad-soft);color:var(--bad)}.subject-bars{flex-direction:column;gap:10px;margin-top:12px;display:flex}.subject-bar{grid-template-columns:minmax(120px,220px) 1fr 52px;align-items:center;gap:12px;display:grid}.bar{background:var(--border);border-radius:5px;height:10px;overflow:hidden}.bar>div{border-radius:5px;height:100%}.bar>.good{background:var(--good)}.bar>.ok{background:var(--ok)}.bar>.bad{background:var(--bad)}.review.is-wrong{border-left:4px solid var(--bad)}.review.is-correct{border-left:4px solid var(--good)}@media (width<=560px){.card{padding:16px}.timer{font-size:1.3rem}.runner-bar .btn{padding:6px 12px}.subject-bar{grid-template-columns:1fr 52px}.subject-bar .bar{grid-area:2/1/auto/-1}.score{font-size:2.8rem}}