:root{--bg: #0a0a14;--bg-card: #12122a;--bg-step: #1a1a35;--bg-step-on: rgba(99, 102, 241, .25);--accent: #6366f1;--accent-hover: #818cf8;--accent-glow: rgba(99, 102, 241, .15);--green: #22c55e;--green-glow: rgba(34, 197, 94, .3);--orange: #f59e0b;--red: #ef4444;--text: #e8e8f0;--text2: #9a9ab8;--text-muted: #6a6a88;--border: rgba(255, 255, 255, .08);--radius: 12px;--font-sans: "Inter", -apple-system, sans-serif;--font-mono: "JetBrains Mono", monospace;--clr-kick: #ef4444;--clr-snare: #f59e0b;--clr-hihat-c: #22c55e;--clr-hihat-o: #06b6d4;--clr-clap: #a855f7;--clr-tom: #ec4899;--clr-bass: #f97316}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100vh;display:flex;justify-content:center;padding:16px;overscroll-behavior:none}.container{max-width:900px;width:100%}.header{text-align:center;margin-bottom:24px}.back-link{display:inline-block;margin-bottom:12px;color:var(--text2);text-decoration:none;font-size:.8rem;transition:color .2s}.back-link:hover{color:var(--accent)}h1{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#e8e8f0,#a5b4fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:var(--text2);font-size:.8rem;margin-top:4px}.badge-phase{display:inline-block;padding:2px 8px;margin-top:6px;border-radius:9999px;font-size:.65rem;font-weight:600;background:#f59e0b1f;color:var(--orange);border:1px solid rgba(245,158,11,.3)}.controls{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:4px;padding:8px 18px;border:1px solid var(--border);border-radius:9999px;font-family:var(--font-sans);font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s;background:transparent;color:var(--text)}.btn:hover{border-color:var(--accent)}.btn:active{transform:scale(.97)}.btn-play{background:var(--green);color:#000;border-color:var(--green)}.btn-play:hover{background:#16a34a;border-color:#16a34a;box-shadow:0 0 16px var(--green-glow)}.btn-play.playing{background:var(--red);border-color:var(--red)}.btn-play.playing:hover{background:#dc2626;border-color:#dc2626;box-shadow:0 0 16px #ef44444d}.bpm-group{display:flex;align-items:center;gap:8px}.bpm-label{font-size:.75rem;color:var(--text2);font-family:var(--font-mono)}.bpm-value{font-family:var(--font-mono);font-weight:700;font-size:.9rem;color:var(--accent);min-width:36px;text-align:center}.bpm-slider{width:100px;accent-color:var(--accent)}.swing-group{display:flex;align-items:center;gap:8px}.swing-label{font-size:.7rem;color:var(--text2)}.swing-value{font-family:var(--font-mono);font-size:.75rem;color:var(--orange);min-width:28px}.swing-slider{width:70px;accent-color:var(--orange)}.master-vol-group{display:flex;align-items:center;gap:6px;margin-left:auto}.vol-icon{font-size:.85rem}.master-vol-slider{width:70px;accent-color:var(--accent)}.track-vol-group{display:flex;align-items:center;gap:4px;padding:3px 8px;background:#ffffff0a;border-radius:6px;border:1px solid var(--border)}.track-vol-label{font-size:.7rem;color:var(--text2);white-space:nowrap}.track-vol-slider{width:50px}.drum-vol-color{accent-color:var(--green)}.melody-vol-color{accent-color:var(--accent)}.sequencer{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;overflow-x:auto}.seq-row{display:flex;align-items:center;gap:4px;margin-bottom:4px}.seq-row:last-child{margin-bottom:0}.part-label{width:70px;flex-shrink:0;font-size:.7rem;font-weight:600;color:var(--text2);text-align:right;padding-right:8px}.part-vol{width:50px;flex-shrink:0;accent-color:var(--text2)}.steps{display:flex;gap:3px;flex:1}.step{flex:1;min-width:28px;aspect-ratio:1;max-height:40px;background:var(--bg-step);border:1px solid var(--border);border-radius:6px;cursor:pointer;transition:all .1s;position:relative}.step:hover{border-color:#fff3;transform:scale(1.08)}.step.on{border-color:var(--part-color, var(--accent));background:var(--bg-step-on);box-shadow:0 0 8px color-mix(in srgb,var(--part-color, var(--accent)) 30%,transparent)}.step.current{border-color:var(--green);box-shadow:0 0 10px var(--green-glow)}.step.on.current{background:color-mix(in srgb,var(--part-color, var(--accent)) 50%,var(--green) 50%);border-color:var(--green)}.beat-marker{display:flex;gap:3px;margin-left:74px;margin-bottom:6px;padding-left:54px}.beat-num{flex:1;min-width:28px;text-align:center;font-size:.55rem;font-family:var(--font-mono);color:var(--text-muted)}.beat-num.downbeat{color:var(--text2);font-weight:700}.action-bar{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}.preset-select{padding:8px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:9999px;font-family:var(--font-sans);font-size:.8rem;color:var(--text);cursor:pointer;transition:border-color .2s}.preset-select:hover{border-color:var(--accent)}.preset-select:focus{outline:none;border-color:var(--accent)}option{background:var(--bg-card);color:var(--text)}.btn-small{padding:6px 14px;font-size:.75rem}.btn-clear{color:var(--red);border-color:#ef44444d}.btn-clear:hover{border-color:var(--red);background:#ef444414}.btn-random{color:var(--orange);border-color:#f59e0b4d}.btn-random:hover{border-color:var(--orange);background:#f59e0b14}.info{margin-top:20px;padding:14px 18px;background:var(--bg-card);border-radius:var(--radius);border-left:3px solid var(--accent);font-size:.75rem;color:var(--text2);line-height:1.6}.tab-bar{display:flex;gap:4px;margin-bottom:16px}.tab-btn{flex:1;padding:10px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius) var(--radius) 0 0;font-family:var(--font-sans);font-size:.85rem;font-weight:600;color:var(--text2);cursor:pointer;transition:all .2s;text-align:center}.tab-btn:hover{color:var(--text);border-color:#ffffff26}.tab-btn.active{background:var(--bg-card);color:var(--accent);border-color:var(--accent);border-bottom:2px solid var(--accent)}.tab-panel{display:none}.tab-panel.active{display:block}.melody-controls{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;flex-wrap:wrap}.synth-group,.scale-group{display:flex;align-items:center;gap:8px}.synth-group label,.scale-group label{font-size:.7rem;color:var(--text2);white-space:nowrap}.melody-select{padding:5px 10px;background:var(--bg-step);border:1px solid var(--border);border-radius:8px;font-family:var(--font-sans);font-size:.75rem;color:var(--text);cursor:pointer;transition:border-color .2s}.melody-select:hover,.melody-select:focus{border-color:var(--accent);outline:none}.melody-select option{background:var(--bg-card);color:var(--text)}.adsr-group{display:flex;align-items:center;gap:6px;padding:12px 18px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;flex-wrap:wrap}.adsr-group .adsr-title{font-size:.7rem;color:var(--text2);font-weight:600;margin-right:4px}.adsr-item{display:flex;align-items:center;gap:4px}.adsr-item label{font-size:.65rem;color:var(--text-muted);font-family:var(--font-mono);min-width:14px}.adsr-slider{width:60px;accent-color:var(--accent)}.adsr-val{font-family:var(--font-mono);font-size:.6rem;color:var(--text2);min-width:28px}.piano-roll-wrap{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:12px;overflow-x:auto}.piano-roll-container{display:flex;gap:0;min-width:600px}.piano-keys{flex-shrink:0;width:48px}.piano-key{height:20px;display:flex;align-items:center;justify-content:flex-end;padding-right:6px;font-size:.55rem;font-family:var(--font-mono);color:var(--text-muted);border-bottom:1px solid rgba(255,255,255,.03)}.piano-key.black-key{background:#ffffff08;color:var(--text2)}.piano-key.scale-note{color:var(--accent)}#pianoCanvas{cursor:crosshair;border-radius:4px}.track-ms-btns{display:flex;gap:2px}.ms-btn{width:22px;height:22px;border:1px solid var(--border);border-radius:4px;background:transparent;color:var(--text-muted);font-size:.6rem;font-weight:700;font-family:var(--font-mono);cursor:pointer;transition:all .15s;padding:0;line-height:1}.ms-btn:hover{border-color:#ffffff4d;color:var(--text)}.ms-btn.muted{background:var(--red);border-color:var(--red);color:#fff}.ms-btn.soloed{background:var(--orange);border-color:var(--orange);color:#000}.fx-panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;overflow:hidden}.fx-header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background .2s}.fx-header:hover{background:#ffffff08}.fx-title{font-size:.8rem;font-weight:600;color:var(--text2)}.fx-toggle{font-size:.7rem;color:var(--text-muted);transition:transform .2s}.fx-panel.open .fx-toggle{transform:rotate(180deg)}.fx-body{display:none;padding:0 16px 14px}.fx-panel.open .fx-body{display:block}.fx-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.04);flex-wrap:wrap}.fx-row:last-child{border-bottom:none}.fx-enable{width:16px;height:16px;accent-color:var(--green);cursor:pointer}.fx-name{font-size:.75rem;font-weight:600;color:var(--text);min-width:80px}.fx-param{display:flex;align-items:center;gap:4px}.fx-param label{font-size:.65rem;color:var(--text-muted);white-space:nowrap}.fx-slider{width:70px;accent-color:var(--accent)}.fx-param-val{font-family:var(--font-mono);font-size:.6rem;color:var(--text2);min-width:32px}.fx-select{padding:3px 8px;background:var(--bg-step);border:1px solid var(--border);border-radius:6px;font-family:var(--font-sans);font-size:.7rem;color:var(--text);cursor:pointer}.bass-vol-color{accent-color:#f97316}@media(max-width:600px){.controls{gap:8px;padding:12px 14px}.bpm-slider{width:80px}.swing-slider,.master-vol-slider{width:50px}.master-vol-group{margin-left:0}.part-label{width:50px;font-size:.6rem}.part-vol{width:36px}.step{min-width:20px;max-height:32px}.beat-marker{margin-left:54px;padding-left:40px}.sequencer{padding:10px}.adsr-slider{width:44px}.piano-roll-container{min-width:480px}.piano-keys{width:36px}.piano-key{font-size:.5rem;height:18px}.fx-slider{width:50px}.fx-name{min-width:60px;font-size:.7rem}.file-bar{flex-wrap:wrap;gap:6px}.file-bar .btn{font-size:.65rem;padding:5px 8px}.file-bar select{font-size:.65rem}}.file-bar{display:flex;align-items:center;gap:10px;padding:10px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;margin-bottom:12px;flex-wrap:wrap}.file-bar 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var(--border);border-radius:6px;color:var(--text);font-size:.75rem;font-family:var(--font-sans)}.export-progress{display:none;align-items:center;gap:8px;font-size:.75rem;color:var(--green)}.export-progress.active{display:flex}.export-spinner{width:14px;height:14px;border:2px solid rgba(34,197,94,.3);border-top-color:var(--green);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.save-toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%) translateY(60px);background:var(--bg-card);border:1px solid var(--green);color:var(--green);padding:10px 24px;border-radius:8px;font-size:.85rem;font-family:var(--font-sans);z-index:1000;opacity:0;transition:all .3s ease;pointer-events:none}.save-toast.show{opacity:1;transform:translate(-50%) translateY(0)}