:root{--bg: #0f172a;--panel: #1e293b;--panel-2: #273449;--text: #e2e8f0;--muted: #94a3b8;--accent: #3b82f6;--accent-hover: #2563eb;--good: #22c55e;--bad: #ef4444;--warn: #eab308;--border: #334155;color-scheme:dark}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}.app{max-width:960px;margin:0 auto;padding:24px 20px 60px}h1{font-size:1.5rem;margin:0 0 4px}.muted{color:var(--muted)}.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px}.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.btn{font:inherit;padding:10px 18px;border-radius:8px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);cursor:pointer}.btn:hover{background:#31425c}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-hover)}.btn:disabled{opacity:.5;cursor:default}.toggle-group{display:inline-flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}.toggle-group button{font:inherit;padding:8px 16px;background:var(--panel-2);color:var(--text);border:none;border-right:1px solid var(--border);cursor:pointer}.toggle-group button:last-child{border-right:none}.toggle-group button.on{background:var(--accent);color:#fff}.level-card{flex:1 1 180px;min-width:160px;text-align:left;padding:16px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2);cursor:pointer}.level-card.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.level-card.locked{opacity:.45;cursor:not-allowed}.level-card h3{margin:0 0 6px}.symbol{font-size:3rem;font-weight:700;letter-spacing:.02em}.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.8rem;font-weight:600}.badge.again{background:#7f1d1d;color:#fecaca}.badge.hard{background:#78350f;color:#fde68a}.badge.good{background:#14532d;color:#bbf7d0}.badge.easy{background:#0e7490;color:#cffafe}.badge.speed{background:#6d28d9;color:#ede9fe}.progressbar{height:8px;background:var(--panel-2);border-radius:999px;overflow:hidden}.progressbar>div{height:100%;background:var(--accent);transition:width .2s}.countdown{font-variant-numeric:tabular-nums;font-weight:600}.stat{flex:1 1 120px;background:var(--panel-2);border-radius:10px;padding:12px 14px}.stat .n{font-size:1.6rem;font-weight:700}.stat .l{font-size:.8rem;color:var(--muted)}.keyboard-wrap{overflow-x:auto;padding:8px 0}.coach{margin-top:10px;padding:10px 14px;border-radius:8px;background:#422006;color:#fde68a;border:1px solid #854d0e}.session{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh;max-width:480px;margin:0 auto;padding:12px;gap:10px}.zone-top{flex:0 0 auto}.zone-mid{flex:1 1 auto;display:flex;flex-direction:column;justify-content:center;gap:12px;min-height:0}.zone-bottom{flex:0 0 auto;display:flex;gap:8px;padding-top:4px}.zone-bottom .btn{flex:1 1 0;min-height:48px}.zone-bottom .btn.end{flex:0 0 auto}.settings-screen{max-width:480px}.sel-chip{min-height:48px;padding:0 16px;border:2px solid var(--border);border-radius:999px;background:var(--panel-2);color:var(--text);font-size:.95rem;font-weight:600;cursor:pointer;touch-action:manipulation}.sel-chip.on{background:var(--accent);border-color:var(--accent);color:#04122e}.pc-buttons{display:flex;flex-direction:column;gap:8px}.pc-chips{display:flex;flex-wrap:wrap;gap:6px;min-height:28px;justify-content:center}.pc-chip{background:var(--panel-2);border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-size:.85rem;font-weight:600}.pc-row{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.pc-btn{min-height:52px;border:2px solid var(--border);border-radius:10px;background:var(--panel-2);color:var(--text);font-size:1.05rem;font-weight:700;cursor:pointer;touch-action:manipulation}.pc-btn:disabled{cursor:default}.shape-choices{display:flex;flex-direction:column;gap:10px;width:100%;max-height:100%;overflow-y:auto}.shape-card{min-height:150px;flex:0 0 auto;padding:10px;border:1px solid var(--border);border-radius:12px;background:var(--panel-2);cursor:pointer;touch-action:manipulation;display:flex;align-items:center}.shape-card:disabled{cursor:default}.prog-bar{display:flex;gap:8px;justify-content:center;align-items:stretch}.prog-chord{flex:1 1 0;max-width:130px;padding:8px 6px;border:1px solid var(--border);border-radius:10px;background:var(--panel-2);text-align:center}.prog-chord.current{background:var(--panel)}.prog-roman{font-size:.75rem;color:var(--muted);font-weight:600}.prog-sym{font-size:1.1rem;font-weight:700;margin-top:2px}.prog-step{font-size:.72rem;margin-top:2px}.lead-sheet{display:flex;flex-direction:column;gap:6px;margin-top:4px}.ls-row{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.ls-bar{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:6px;padding:8px 4px 6px;text-align:center;min-height:56px}.ls-bar.current{border-color:var(--accent);background:var(--panel-2);box-shadow:0 0 0 1px var(--accent)}.ls-bar.missed{border-color:var(--bad)}.ls-bar.in-span{background:var(--panel-2)}.ls-bar.tappable{cursor:pointer}.ls-num{position:absolute;top:2px;left:5px;font-size:.62rem;color:var(--muted)}.ls-sym{display:block;font-weight:700;font-size:.95rem;margin-top:6px}.ls-roman{display:block;font-size:.66rem;color:var(--muted);margin-top:2px}.ls-preview{display:flex;align-items:center;justify-content:center;gap:14px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:8px}.ls-preview-sym{font-size:1.15rem;font-weight:700}.ls-preview-sym.next{color:var(--accent)}.ls-preview-arrow{color:var(--muted)}.tune-sections{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}.tune-choices{display:flex;flex-direction:column;gap:10px;margin-top:10px}.tune-play{padding-bottom:24px}.calib-pad{width:100%;min-height:160px;margin-top:16px;font-size:1.2rem}