:root{--bg: #1a1b1f;--panel: #22242a;--panel-border: #2e3138;--text: #d8dde3;--text-dim: #8a8f99;--dot: #8b939b;--line: #4fb3f0;--danger: #e0664b}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Inter,system-ui,sans-serif;font-size:14px;overflow:hidden;-webkit-font-smoothing:antialiased}#app{display:grid;grid-template-columns:260px 1fr;height:100vh;height:100dvh;width:100vw}.mobile-bar{display:none}.sidebar{background:var(--panel);border-right:1px solid var(--panel-border);padding:22px 20px;overflow-y:auto;display:flex;flex-direction:column;gap:18px}.sidebar__header h1{margin:0 0 6px;font-size:18px;font-weight:600;letter-spacing:.2px}.sidebar__sub{margin:0;color:var(--text-dim);font-size:12px;line-height:1.5}.control{display:flex;flex-direction:column;gap:8px}.control label{display:flex;justify-content:space-between;align-items:baseline;font-size:12px;color:var(--text-dim)}.control__value{color:var(--text);font-variant-numeric:tabular-nums;font-weight:500}.control--row{flex-direction:row;align-items:center;justify-content:space-between}.control--row label{color:var(--text-dim)}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:4px;background:#34373f;border-radius:999px;outline:none}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:14px;height:14px;border-radius:50%;background:var(--text);cursor:pointer;border:2px solid var(--panel);box-shadow:0 0 0 1px #34373f;transition:transform .12s ease}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--text);cursor:pointer;border:2px solid var(--panel)}input[type=color]{width:44px;height:28px;border:none;border-radius:6px;background:transparent;cursor:pointer;padding:0}input[type=color]::-webkit-color-swatch-wrapper{padding:0}input[type=color]::-webkit-color-swatch{border:1px solid #34373f;border-radius:6px}.actions{display:flex;gap:8px;margin-top:4px}.btn{flex:1;padding:8px 12px;border-radius:8px;border:1px solid #34373f;background:transparent;color:var(--text);font-size:12px;font-weight:500;cursor:pointer;transition:background .12s ease,border-color .12s ease}.btn:hover{background:#2a2d34}.btn--ghost{color:var(--text-dim)}.btn--danger{border-color:#4a2a26;color:var(--danger)}.btn--full{width:100%;margin-top:8px}.btn--danger:hover{background:#2e1f1d}.instrument-row{display:flex;gap:6px}.instrument{flex:1;padding:11px 4px;border-radius:8px;border:1.5px solid var(--ins-color, #34373f);background:transparent;color:var(--text);font-size:11px;font-weight:600;cursor:pointer;transition:background .12s ease,color .12s ease,box-shadow .12s ease}.instrument:hover{background:#ffffff0d}.instrument--active{background:var(--ins-color);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.45);box-shadow:0 0 12px -2px var(--ins-color)}.instrument--piano{--ins-color: #4fb3f0}.instrument--synth{--ins-color: #7833e5}.instrument--casio{--ins-color: #dd85e0}.sound{border-top:1px solid var(--panel-border);padding-top:16px}.toggle{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--text);cursor:pointer}.toggle input{width:14px;height:14px;accent-color:var(--line);cursor:pointer;margin:0}.sidebar__footer{margin-top:auto}.hint{margin:0;font-size:11px;color:var(--text-dim);line-height:1.5}.canvas-wrap{position:relative;overflow:hidden}#canvas{display:block;width:100%;height:100%;cursor:crosshair;-webkit-user-select:none;user-select:none;touch-action:none}.dot{fill:var(--dot);transition:fill .18s ease,r .18s ease}.dot--near{fill:#b8bec7}.dot--flash{animation:dot-flash .5s ease-out}@keyframes dot-flash{0%{fill:#fff;filter:drop-shadow(0 0 6px rgba(255,255,255,.9))}to{fill:var(--dot);filter:drop-shadow(0 0 0 rgba(255,255,255,0))}}.path-stroke{fill:none;stroke-linejoin:round;stroke-linecap:round;pointer-events:none}.path-stroke--live{opacity:.95}.path-stroke--committed{animation:draw-in .35s ease-out}.path-hit{fill:none;stroke:transparent;stroke-width:24;stroke-linejoin:round;stroke-linecap:round;pointer-events:stroke;cursor:pointer}.path-stroke--playing{animation:playing-pulse 1.7s ease-in-out infinite}@keyframes playing-pulse{0%,to{opacity:1}50%{opacity:.55}}.playhead{stroke:#fff;pointer-events:none;opacity:0;transition:opacity .25s ease}.playhead--on{opacity:1}@keyframes draw-in{0%{stroke-dasharray:var(--dash, 2000);stroke-dashoffset:var(--dash, 2000);opacity:0}to{stroke-dasharray:var(--dash, 2000);stroke-dashoffset:0;opacity:1}}.start-marker{fill:none;stroke-width:2;opacity:0;transition:opacity .15s ease}.start-marker--show{opacity:.8}.audio-status{position:fixed;top:12px;left:50%;transform:translate(-50%);z-index:20;padding:6px 14px;border-radius:999px;background:var(--panel);border:1px solid var(--panel-border);color:var(--text-dim);font-size:12px;font-weight:500;pointer-events:none;box-shadow:0 4px 14px #0000004d}.audio-status[hidden]{display:none}.audio-status--error{color:var(--danger);border-color:#4a2a26;pointer-events:auto;cursor:pointer}@media (max-width: 640px){#app{grid-template-columns:1fr;grid-template-rows:1fr auto}.sidebar{display:none}.mobile-bar{display:flex;gap:8px;padding:10px 12px;padding-bottom:calc(10px + env(safe-area-inset-bottom,0px));background:var(--panel);border-top:1px solid var(--panel-border)}.mobile-bar .instrument{padding:15px 6px;font-size:13px}}