:root{--bg:#0b0d12;--panel:#121620;--panel-2:#1a1f2b;--border:#252b38;--text:#e8ecf3;--muted:#8a93a6;--accent:#4fd1c5;--accent-2:#7dd3fc;--danger:#fc8181;--radius:10px;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;color:var(--text);background:var(--bg);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}html,body,#root,.drop-root{height:100%;margin:0;overflow:hidden}body{background:var(--bg);-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit}.muted{color:var(--muted)}.small{font-size:13px}.app{grid-template-rows:auto 1fr auto;height:100%;display:grid}.header{background:linear-gradient(180deg, #10141c, var(--bg));border-bottom:1px solid var(--border);align-items:center;gap:16px;padding:10px 16px;display:flex}.brand{letter-spacing:.2px;white-space:nowrap;align-items:center;gap:10px;font-weight:700;display:flex}.brand-mark{background:linear-gradient(135deg, var(--accent), #a78bfa);border-radius:6px;width:22px;height:22px;box-shadow:0 0 16px #4fd1c573}.song-title{flex:1;justify-content:center;align-items:center;gap:6px;min-width:0;display:flex}.song-name{text-overflow:ellipsis;white-space:nowrap;font-weight:600;overflow:hidden}.header-actions{align-items:center;gap:8px;display:flex}.stage{flex-direction:column;min-height:0;display:flex}.waterfall{flex:1;min-height:0;position:relative}.waterfall canvas,.keyboard{width:100%;display:block}.waterfall canvas{height:100%}.keyboard{touch-action:none;cursor:pointer;-webkit-user-select:none;user-select:none;height:clamp(110px,20vh,210px)}.empty-state{text-align:center;pointer-events:none;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:24px;display:flex;position:absolute;inset:0}.empty-state>*{max-width:520px}.empty-state h2{margin:0;font-size:22px}.empty-state p{margin:0 0 6px;line-height:1.5}.empty-state .btn{pointer-events:auto}.controls{background:var(--panel);border-top:1px 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10px;font-size:13px;display:flex}.track.off{opacity:.5}.track-dot{border-radius:50%;flex:none;width:10px;height:10px}.track-name{text-overflow:ellipsis;white-space:nowrap;max-width:140px;overflow:hidden}.btn{border:1px solid var(--border);border-radius:var(--radius);background:var(--panel-2);cursor:pointer;align-items:center;gap:6px;padding:8px 14px;font-size:14px;font-weight:600;transition:background .15s,border-color .15s,transform .1s;display:inline-flex}.btn:hover{background:#222838;border-color:#3a4256}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#062a27}.btn.primary:hover{background:#6ee0d5}.btn.big{border-radius:14px;padding:14px 40px;font-size:17px;box-shadow:0 8px 30px #4fd1c559}.icon-btn{border:1px solid var(--border);background:var(--panel-2);cursor:pointer;border-radius:50%;place-items:center;width:36px;height:36px;transition:background .15s,opacity 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#f6ad5599;border-radius:4px;height:16px;position:absolute;top:50%;transform:translateY(-50%)}.loop-marker{pointer-events:none;background:#f6ad55;width:2px;height:18px;position:absolute;top:50%;transform:translate(-1px,-50%)}.icon-btn.loop-btn.on{color:#fbd38d;background:#f6ad5533;border-color:#f6ad5599}.midi-chip{color:#86efac;border:1px solid #4ade8066;border-radius:999px;align-items:center;gap:4px;padding:6px 10px;display:inline-flex}.dot{background:#4ade80;border-radius:50%;width:8px;height:8px;display:inline-block;box-shadow:0 0 8px #4ade80}.setting{flex-direction:column;gap:8px;margin:16px 0;display:flex}.setting.check{cursor:pointer;flex-direction:row;align-items:flex-start;gap:10px}.setting.check>span{flex-direction:column;gap:2px;display:flex}.setting input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent);margin-top:2px}.setting-label{font-weight:600}.midi-ok{color:#86efac;align-items:center;gap:8px;display:flex}.exercise-list{gap:6px;margin:12px 0 0;padding:0;list-style:none;display:grid}.exercise{border:1px solid var(--border);border-radius:var(--radius);background:var(--panel-2);text-align:left;cursor:pointer;align-items:center;gap:12px;width:100%;padding:12px 14px;display:flex}.exercise:hover{border-color:var(--accent)}.exercise-title{flex:1;font-weight:600}.exercise-level{color:var(--muted);font-size:12px}.steps{gap:4px;margin:0;padding-left:20px;display:grid}.result-score{flex-direction:column;align-items:center;gap:2px;margin:12px 0 18px;display:flex}.result-accuracy{background:linear-gradient(135deg, var(--accent), #86efac);color:#0000;-webkit-background-clip:text;background-clip:text;font-size:52px;font-weight:800;line-height:1}.badge{color:#fbd38d;background:#f6ad552e;border-radius:999px;margin-top:8px;padding:3px 10px;font-size:13px;font-weight:700}.result-rows{gap:6px;margin:0;display:grid}.result-rows div{border-bottom:1px solid var(--border);justify-content:space-between;padding-bottom:6px;display:flex}.result-rows 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8px;font-size:12px}.empty-state{pointer-events:auto;justify-content:flex-start;padding:24px 16px;overflow-y:auto}.empty-state>.home-card{border:1px solid var(--border);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);text-align:left;background:#121620e0;border-radius:16px;width:100%;max-width:640px;margin:auto 0;padding:18px 20px}.home-card>p{margin:14px 0 0}.library{flex-direction:column;gap:14px;display:flex}.library h3{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 8px;font-size:13px;font-weight:700}.library p{margin:0 0 8px}.search{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);width:100%;color:var(--text);font:inherit;padding:9px 12px}.search:focus{border-color:var(--accent);outline:none}.song-list{gap:6px;margin:0 0 8px;padding:0;list-style:none;display:grid}.song-row{align-items:center;gap:4px;display:flex}.song-open{border:1px solid var(--border);border-radius:var(--radius);background:var(--panel-2);text-align:left;cursor:pointer;flex:1;align-items:center;gap:12px;min-width:0;padding:10px 14px;display:flex}.song-open:hover{border-color:var(--accent)}.song-row-title{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-weight:600;overflow:hidden}.song-row-meta{color:var(--muted);white-space:nowrap;gap:10px;font-size:12px;display:flex}.song-row-meta .best{color:#86efac;font-weight:600}.btn.small-btn{padding:6px 12px;font-size:13px}.dialog.library-dialog{width:min(600px,100% - 32px)}.toast.notice{color:#d6f1ff;background:#11202b;border-color:#7dd3fc66;padding:10px 16px}@media (width<=720px){.song-row-meta span:not(.best){display:none}}.app{grid-template-columns:minmax(0,1fr)}.metronome{flex-wrap:wrap}.env-badge{color:#2a1606;letter-spacing:.08em;background:#f6ad55;border-radius:6px;padding:2px 8px;font-size:11px;font-weight:800}