:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#111827;--panel:#1f2937;--line:#374151;--fg:#f3f4f6;--muted:#9ca3af;--accent:#fbbf24;--ok:#22c55e;--bad:#ef4444}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--fg);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans CJK TC,PingFang TC,sans-serif}.app{max-width:720px;margin:0 auto;padding:0 12px 48px}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:4px 0;display:flex}.brand{color:var(--accent);white-space:nowrap;align-items:center;min-height:44px;font-size:1.1rem;font-weight:700;text-decoration:none;display:inline-flex}nav{display:flex}nav a{color:var(--muted);align-items:center;min-height:44px;margin-left:2px;padding:0 5px;text-decoration:none;display:inline-flex}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.sr-only{clip:rect(0 0 0 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16px;text-decoration:none;display:inline-flex}button:disabled{opacity:.5;cursor:default}button.primary,.primary{background:var(--accent);color:#111827;border-color:var(--accent);font-weight:600}button.big,.big{min-height:64px;padding:18px 28px;font-size:1.4rem}button.small,.small.button{min-height:40px;padding:6px 12px;font-size:.85rem}button.link{min-height:44px;color:var(--fg);text-align:left;background:0 0;border:none;padding:4px 0;text-decoration:underline}button.active{border-color:var(--accent)}input[type=text],input:not([type]),input[type=number],select{font:inherit;background:var(--panel);color:var(--fg);border:1px solid var(--line);border-radius:8px;min-height:44px;padding:10px}input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent);flex:none;margin:0}.row{align-items:center;gap:10px;margin:8px 0;display:flex}.row.wrap{flex-wrap:wrap}.row.wrap input:not([type=number]):not([type=checkbox]){flex:200px;min-width:0}.check{align-items:center;gap:10px;min-height:44px;margin:0;display:flex}.module-grid{grid-template-columns:1fr;gap:10px;margin:12px 0;display:grid}.module-card{background:var(--panel);border:1px solid var(--line);color:var(--fg);border-radius:12px;flex-direction:column;gap:4px;min-height:64px;padding:14px;text-decoration:none;display:flex}.module-card b{font-size:1.05rem}.drill-head{color:var(--muted);justify-content:space-between;margin-bottom:8px;display:flex}.drill-prompt{text-align:center;margin:10px 0 16px}.prompt-text{font-size:3rem}.play{font-size:1.3rem}.play.big{border-radius:60px;width:120px;height:120px;font-size:2.4rem}.options{grid-template-columns:1fr 1fr;gap:10px;display:grid}.options.tones{grid-template-columns:1fr 1fr}.option{border-width:2px;min-height:64px;font-size:1.5rem}.option.right{border-color:var(--ok);box-shadow:0 0 0 2px var(--ok) inset}.option.wrong{border-color:var(--bad);box-shadow:0 0 0 2px var(--bad) inset}.option.right:disabled,.option.wrong:disabled{opacity:1}.audio-options{grid-template-columns:1fr}.audio-option{border:2px solid #0000;border-radius:12px;align-items:center;gap:10px;padding:6px;display:flex}.audio-option.right{border-color:var(--ok)}.audio-option.wrong{border-color:var(--bad)}.audio-option .option{flex:1;font-size:1.1rem}.feedback{background:var(--panel);border-left:6px solid var(--line);border-radius:12px;margin-top:16px;padding:12px}.feedback.ok{border-left-color:var(--ok)}.feedback.bad{border-left-color:var(--bad)}.feedback-line{font-size:1.1rem}.feedback-actions{justify-content:flex-end;gap:10px;margin-top:10px;display:flex}.zh-keyboard{margin:10px 0}.zh-display{text-align:center;background:var(--panel);border-radius:10px;min-height:56px;margin-bottom:8px;padding:6px;font-size:2rem}.key-row{flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:6px;display:flex}.key{min-width:44px;min-height:44px;padding:0;font-size:1.3rem}.key.wide{min-width:96px}.start,.summary{text-align:center;padding:24px 0}.table-wrap{margin:8px 0;overflow-x:auto}.table{border-collapse:collapse;width:100%}.table td,.table th{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:6px 8px}tr.band-sweet td{background:#22c55e26}tr.band-hard td{opacity:.8}.contour-plot{background:var(--panel);border-radius:10px;width:100%;height:auto;margin:10px 0}.probs{margin:8px 0}.prob-row{grid-template-columns:64px 1fr 48px;align-items:center;gap:8px;margin:4px 0;display:grid}.bar{background:var(--line);border-radius:7px;height:14px;overflow:hidden}.fill{height:100%}.record{min-width:160px;font-size:1.3rem}.record.on{background:var(--bad);border-color:var(--bad);color:#fff}.record-row{justify-content:center;align-items:center;gap:10px;margin:12px 0;display:flex}.target{text-align:center}.target .row{justify-content:center}.stats dt{color:var(--muted);margin-top:8px}.stats dd{margin:2px 0 0}.tabs button{min-height:40px}.unknown-words{margin-top:6px;line-height:1.8}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--panel);border-radius:8px;padding:8px}@media (min-width:520px){.module-grid{grid-template-columns:1fr 1fr}}.pitch-lane{background:var(--panel);border-radius:10px;width:100%;max-width:420px;margin:8px auto;display:block}.lane-advice{margin:6px 0;padding-left:18px}.lane-advice li{margin:3px 0}.lane-cues{flex-wrap:wrap;gap:8px;margin:6px 0;display:flex}.lane-cue{background:var(--line);border-radius:999px;padding:3px 8px;font-size:.85rem}.lane-cue.ok{background:var(--good,#15803d);color:#fff}.lane-cue.miss{background:var(--bad);color:#fff}.matched{font-weight:600}.lane-hint{text-align:center;max-width:420px;margin:4px auto 8px}.lane-wrap{max-width:420px;margin:8px auto}.lane-wrap .pitch-lane{margin:0}.lane-levels{text-align:center;margin:2px 0 0}.legend{flex-wrap:wrap;justify-content:center;gap:4px 14px;margin:6px 0 0;display:flex}.legend-item{white-space:nowrap;align-items:center;gap:6px;display:inline-flex}.swatch{background:var(--sw);border-radius:2px;width:18px;height:4px;display:inline-block}.swatch.faint{opacity:.45;height:2px}.swatch.dashed{background:repeating-linear-gradient(90deg, var(--sw) 0 5px, transparent 5px 8px);height:2px}.swatch.dot{border-radius:50%;width:10px;height:10px}