:root{--bg:#0e0e10;--bg-elev:#18181b;--bg-elev-2:#222226;--border:#2e2e34;--text:#f4f4f5;--text-dim:#a1a1aa;--accent:#4ade80;--accent-dim:#166534;--accent-hot:#22d3ee;--warn:#fbbf24;--error:#f87171;--key-white:#f8fafc;--key-white-active:#4ade80;--key-black:#0a0a0a;--key-black-active:#16a34a;--sheet-bg:#fafafa}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior:none;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;font-size:18px;line-height:1.5}#app{flex-direction:column;gap:24px;max-width:100vw;min-height:100vh;padding:24px;display:flex}.header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.title h1{letter-spacing:-.02em;margin:0;font-size:28px;font-weight:700}.subtitle{color:var(--text-dim);margin-top:2px;font-size:14px;display:block}.connect-area{align-items:center;gap:16px;display:flex}.status{background:var(--bg-elev);border:1px solid var(--border);border-radius:999px;padding:8px 14px;font-size:16px;font-weight:500}.status-connected{color:var(--accent);border-color:var(--accent-dim);background:#4ade8014}.status-no-device,.status-requesting{color:var(--warn);background:#fbbf240f;border-color:#fbbf2466}.status-denied,.status-unsupported{color:var(--error);background:#f871710f;border-color:#f8717166}.connect-btn{border:1px solid var(--accent);background:var(--accent);color:#052e16;cursor:pointer;touch-action:manipulation;border-radius:10px;min-height:48px;padding:12px 22px;font-size:17px;font-weight:600}.connect-btn:disabled{opacity:.5;cursor:not-allowed}.connect-btn:active{transform:translateY(1px)}.devices{background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;padding:12px 16px;font-size:15px}.devices-label{color:var(--text-dim);margin-right:8px}.song-section{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:14px;padding:16px;display:flex}.song-header{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;display:flex}.song-title{color:var(--text);letter-spacing:-.01em;margin:0;font-size:18px;font-weight:600}.song-loading{color:var(--warn);font-size:14px;font-style:italic}.sheet-container{background:var(--sheet-bg);contain:layout paint;border-radius:8px;min-height:180px;max-height:320px;padding:16px;overflow:auto}.sheet-container svg{max-width:100%;height:auto}.transport{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.transport-buttons{gap:10px;display:flex}.transport-btn{border:1px solid var(--border);background:var(--bg-elev-2);min-width:90px;min-height:44px;color:var(--text);cursor:pointer;touch-action:manipulation;border-radius:8px;padding:10px 20px;font-size:16px;font-weight:600;transition:background .12s,opacity .12s}.transport-btn:disabled{opacity:.4;cursor:not-allowed}.transport-btn:not(:disabled):active{transform:translateY(1px)}.play-btn:not(:disabled){background:var(--accent);border-color:var(--accent);color:#052e16}.stop-btn:not(:disabled){background:var(--error);border-color:var(--error);color:#450a0a}.tempo-control{flex-direction:column;flex:260px;gap:6px;min-width:240px;display:flex}.tempo-label{color:var(--text-dim);font-size:14px;font-weight:500}.tempo-label #tempo-value{color:var(--accent-hot);font-variant-numeric:tabular-nums;font-weight:700}.tempo-label .tempo-bpm{color:var(--text-dim);font-variant-numeric:tabular-nums}.tempo-slider{appearance:none;cursor:pointer;touch-action:manipulation;background:0 0;width:100%;height:40px;margin:0;padding:0}.tempo-slider::-webkit-slider-runnable-track{background:var(--bg-elev-2);border:1px solid var(--border);border-radius:4px;height:8px}.tempo-slider::-moz-range-track{background:var(--bg-elev-2);border:1px solid var(--border);border-radius:4px;height:8px}.tempo-slider::-webkit-slider-thumb{appearance:none;background:var(--accent-hot);border:2px solid var(--bg);border-radius:50%;width:28px;height:28px;margin-top:-11px;box-shadow:0 2px 6px #00000080}.tempo-slider::-moz-range-thumb{background:var(--accent-hot);border:2px solid var(--bg);border-radius:50%;width:28px;height:28px;box-shadow:0 2px 6px #00000080}.keyboard-section{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:16px;overflow-x:auto}.keyboard{-webkit-user-select:none;user-select:none;min-width:100%;height:200px;display:flex;position:relative}.key.white{background:var(--key-white);border:1px solid #1f2937;border-radius:0 0 6px 6px;flex:1 0 auto;min-width:18px;transition:background-color 60ms ease-out;position:relative}.key.white.active{background:var(--key-white-active)}.key.black{background:var(--key-black);z-index:2;border:1px solid #000;border-radius:0 0 5px 5px;width:60%;height:62%;transition:background-color 60ms ease-out;position:absolute;top:0;right:-30%;box-shadow:0 2px 4px #00000080}.key.black.active{background:var(--key-black-active)}.log-section{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:16px}.log-header{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin-bottom:12px;font-size:14px}.log{flex-direction:column;gap:6px;min-height:48px;margin:0;padding:0;list-style:none;display:flex}.log-entry{background:var(--bg-elev-2);font-variant-numeric:tabular-nums;border-radius:8px;align-items:baseline;gap:14px;padding:8px 12px;display:flex}.log-label{letter-spacing:.08em;color:var(--accent);min-width:28px;font-size:12px;font-weight:700}.log-note{color:var(--text);min-width:42px;font-weight:600}.log-meta{color:var(--text-dim);font-size:14px}.log-empty{color:var(--text-dim);padding:8px 4px;font-size:15px;font-style:italic}.footer{color:var(--text-dim);border-top:1px solid var(--border);margin-top:auto;padding-top:16px;font-size:13px}.footer p{margin:6px 0}.footer strong{color:var(--text)}.practice-controls{flex-wrap:wrap;align-items:center;gap:12px;margin-left:auto;display:flex}.mode-toggle{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);cursor:pointer;touch-action:manipulation;border-radius:8px;padding:8px 16px;font-size:15px;font-weight:600;transition:background .12s,border-color .12s}.mode-toggle:hover{background:var(--border)}.mode-toggle.mode-toggle-active{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}.chunk-nav{align-items:center;gap:6px;display:flex}.chunk-btn{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);cursor:pointer;touch-action:manipulation;border-radius:6px;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;display:flex}.chunk-btn:hover{background:var(--border)}.chunk-btn.chunk-reset{font-size:18px}.chunk-label{color:var(--text-dim);text-align:center;min-width:90px;font-size:14px}.sheet-container.practice-active{outline:2px solid var(--accent);outline-offset:4px;border-radius:4px;transition:outline-color .2s}.settings-toggle{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);cursor:pointer;touch-action:manipulation;border-radius:8px;width:40px;height:40px;font-size:18px}.settings-toggle:hover{background:var(--border)}.settings-section{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:14px;padding:16px 20px;display:flex}.settings-title{color:var(--text);margin:0 0 4px;font-size:16px}.settings-row{color:var(--text-dim);flex-wrap:wrap;align-items:center;gap:12px;font-size:14px;display:flex}.settings-slider{flex:200px;max-width:320px}.settings-btn{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);cursor:pointer;touch-action:manipulation;border-radius:8px;padding:8px 14px;font-size:14px}.settings-btn:hover{background:var(--border)}.juice-combo{color:var(--accent);border:1px solid var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.02em;pointer-events:none;z-index:5;background:#4ade8026;border-radius:999px;padding:4px 12px;font-size:18px;font-weight:700;transition:transform .12s ease-out;position:absolute;top:12px;right:16px}.juice-combo.combo-multiplier{background:var(--warn);color:var(--bg);border-color:var(--warn);transform:scale(1.15);box-shadow:0 0 24px #fbbf2480}.juice-stars{color:var(--warn);letter-spacing:4px;pointer-events:none;z-index:5;text-shadow:0 2px 12px #fbbf2499;font-size:28px;animation:.24s ease-out stars-pop;position:absolute;top:12px;left:50%;transform:translate(-50%)}@keyframes stars-pop{0%{opacity:0;transform:translate(-50%)scale(.4)}60%{opacity:1;transform:translate(-50%)scale(1.2)}to{opacity:1;transform:translate(-50%)scale(1)}}.juice-streak{border:1px solid var(--warn);color:var(--warn);background:#fbbf241f;border-radius:999px;align-items:center;gap:4px;padding:4px 12px;font-size:16px;font-weight:700;display:flex}.juice-streak-count{font-variant-numeric:tabular-nums}.transport{position:relative}@keyframes wrong-shake{0%,to{transform:translate(0)}20%{transform:translate(-4px);background:var(--error)!important}40%{transform:translate(4px);background:var(--error)!important}60%{transform:translate(-3px);background:var(--error)!important}80%{transform:translate(3px);background:var(--error)!important}}.key.wrong-shake{animation:.4s ease-in-out wrong-shake}@media (width<=720px){#app{gap:16px;padding:16px}.title h1{font-size:22px}.keyboard{height:150px}.footer{font-size:12px}.practice-controls{justify-content:space-between;width:100%;margin-left:0}}