:root{--bg: #f6f4ef;--card: #ffffff;--ink: #14213d;--muted: #5d6677;--line: #dcd8cf;--accent: #b86e00;--accent-soft: #fdf0d8;--primary: #14213d;--on-primary: #ffffff;--ok: #1f7a4d;--ok-soft: #e4f4ea;--miss: #a8321f;--miss-soft: #fbe9e5;--focus: #2f6fed;color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #10151f;--card: #1a2130;--ink: #eef1f6;--muted: #9aa5b8;--line: #2e3850;--accent: #ffb84d;--accent-soft: #3a2e17;--primary: #ffb84d;--on-primary: #14213d;--ok: #5fd39a;--ok-soft: #173326;--miss: #ff8f7a;--miss-soft: #3b1d18;--focus: #8fb4ff}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}main{max-width:640px;margin:0 auto;padding:16px 16px 8px}h1{font-size:1.35rem;margin:0;letter-spacing:-.01em}h2{font-size:1.2rem;margin:0 0 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.tag{margin-left:0}.count{font-variant-numeric:tabular-nums;white-space:nowrap}.prompt{font-size:1.08rem}.math{font-size:1.9rem;font-weight:600;text-align:center;margin:18px 0 22px;letter-spacing:.01em;font-variant-numeric:tabular-nums}.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 .12em;font-size:.82em;line-height:1.15}.frac span:first-child{border-bottom:.09em solid currentColor;padding:0 .22em .04em}.frac span:last-child{padding:.04em .22em 0}.answer-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.answer-label{font-weight:600}.answer{font:inherit;font-size:1.35rem;width:8.5ch;min-width:0;flex:0 1 auto;padding:9px 12px;border-radius:10px;border:2px solid var(--line);background:var(--bg);color:var(--ink);text-align:center;font-variant-numeric:tabular-nums}.answer.invalid{border-color:var(--miss)}.unit{color:var(--muted)}.keys{display:inline-flex;gap:6px;margin-left:auto}.key{width:44px;height:44px;border-radius:10px;border:1.5px solid var(--line);background:var(--card);font-size:1.2rem;font-weight:600}.note{font-size:.88rem;color:var(--muted);margin:12px 0 0}.note.warn{color:var(--miss)}.choices{display:grid;gap:8px}.choice{display:flex;align-items:center;gap:14px;text-align:left;background:var(--bg);border:2px solid var(--line);border-radius:10px;padding:10px 14px;min-height:52px;font-size:1.15rem;font-variant-numeric:tabular-nums}.choice .box{width:24px;height:24px;border:2px solid 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li{padding:7px 0;border-bottom:1px solid var(--line)}.week{display:flex;align-items:flex-end;gap:8px;height:100px}.week-day{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:3px}.week-bar{width:100%;max-width:38px;background:var(--accent);border-radius:5px 5px 0 0}.week-n{font-size:.8rem;font-variant-numeric:tabular-nums;min-height:1.2em}.table{width:100%;border-collapse:collapse;margin-top:14px;font-size:.92rem;font-variant-numeric:tabular-nums}.table th{text-align:left;color:var(--muted);font-weight:600;font-size:.8rem;padding:6px 8px 6px 0}.table td{padding:8px 8px 8px 0;border-top:1px solid var(--line);white-space:pre-wrap}.mis-list{list-style:none;padding:0;margin:0}.mis-list li{display:flex;gap:12px;padding:9px 0;border-bottom:1px solid var(--line)}.mis-list li:last-child{border-bottom:0}.mis-n{font-weight:700;font-variant-numeric:tabular-nums;min-width:2.4em;color:var(--miss)}.form{display:grid;gap:12px}.form label{display:grid;gap:4px;font-weight:600;font-size:.9rem}.form input{font:inherit;padding:11px 12px;border-radius:10px;border:2px solid var(--line);background:var(--bg);color:var(--ink)}.tabs{max-width:640px;margin:12px auto 0;padding:0 16px;display:flex;gap:8px}.tab{border:1.5px solid var(--line);background:transparent;border-radius:99px;padding:6px 14px}.tab.on{background:var(--primary);color:var(--on-primary);border-color:var(--primary)}@media (max-width: 420px){.math{font-size:1.6rem}.card{padding:16px}}@media (prefers-reduced-motion: reduce){.bar div{transition:none}}