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16px;display:grid;position:relative}.toolbar-start,.toolbar-end{align-items:center;gap:2px;min-width:0;display:flex}.toolbar-start{gap:6px}.toolbar-end{justify-content:flex-end}.toolbar-sep{background:var(--border);flex:none;width:1px;height:18px;margin:0 6px}.brand{white-space:nowrap;align-items:center;gap:8px;font-weight:600;display:flex}.brand-mark{background:var(--accent);border-radius:3px;width:12px;height:12px}.song-name{text-overflow:ellipsis;white-space:nowrap;font-weight:500;overflow:hidden}.env-badge{background:var(--warning);color:var(--on-warning);letter-spacing:.06em;border-radius:4px;padding:1px 6px;font-size:10px;font-weight:700}.tool-btn{height:28px;color:var(--text-soft);white-space:nowrap;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:5px;flex:none;justify-content:center;align-items:center;gap:6px;padding:0 10px;font-size:12px;transition:background .12s,color .12s,transform 80ms;display:inline-flex}.tool-btn.icon{width:28px;padding:0}.tool-btn:hover:not(:disabled),.tool-btn.on{background:var(--panel-3);color:var(--text)}.tool-btn:disabled{opacity:.35;cursor:default}.tool-btn.muted-btn{color:var(--muted)}.tool-btn.loop-btn.on,.tool-btn.metronome-btn.on{border-color:color-mix(in srgb, var(--accent) 35%, transparent);background:color-mix(in srgb, var(--accent) 12%, transparent);color:var(--accent)}.loop-control{align-items:center;gap:2px;display:flex}.loop-step{font-variant-numeric:tabular-nums;opacity:.8}.segmented{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);padding:2px;display:inline-flex}.segmented button{height:26px;color:var(--muted);white-space:nowrap;cursor:pointer;background:0 0;border:none;border-radius:4px;padding:0 14px;font-size:12px;transition:background .12s,color .12s}.segmented button:hover{color:var(--text)}.segmented button.on{background:var(--panel-3);color:var(--text);box-shadow:inset 0 1px 0 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10px;display:flex}.track:hover{background:var(--panel-3)}.track.off{opacity:.55}.track-swatch{border-radius:1px;flex:none;width:3px;height:20px}.track-name{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.track-meta{color:var(--muted)}.play-btn{border:1px solid var(--border-strong);height:24px;color:var(--muted);white-space:nowrap;cursor:pointer;background:0 0;border-radius:4px;flex:none;padding:0 8px;font-size:11px}.play-btn:hover{color:var(--text)}.play-btn.on{border-color:color-mix(in srgb, var(--accent) 45%, transparent);background:color-mix(in srgb, var(--accent) 14%, transparent);color:var(--accent-hover);font-weight:500}.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,19vh,180px)}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:20px 16px;display:flex;position:absolute;inset:0;overflow:hidden}.empty-state>.home-card{border:1px solid var(--border);background:var(--panel);width:100%;max-width:620px;max-height:100%;box-shadow:0 16px 40px color-mix(in srgb, var(--black) 35%, transparent);text-align:left;border-radius:10px;flex-direction:column;padding:0;display:flex;overflow:hidden}.home-head{letter-spacing:.05em;text-transform:uppercase;color:var(--muted);flex:none;justify-content:space-between;align-items:center;padding:8px 8px 0 18px;font-size:11px;font-weight:600;display:flex}.home-body{overscroll-behavior:contain;min-height:0;padding:0 18px 16px;overflow-y:auto}.home-body>p{margin:14px 0 0;line-height:1.5}.free-play-hint{width:max-content;max-width:calc(100% - 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2px;display:flex}.bpm-input{width:32px;color:var(--text);font:inherit;text-align:right;font-variant-numeric:tabular-nums;appearance:textfield;background:0 0;border:none;padding:0;font-weight:500}.bpm-input:focus{outline:none}.bpm-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.bpm-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.bpm-unit{color:var(--muted);font-size:12px}.tool-btn.bpm-reset{height:24px;padding:0 6px;font-size:11px}.controls .tool-btn.bpm-reset{height:24px}.tool-btn.bpm-reset.hidden{visibility:hidden}.metronome{align-items:center;gap:6px;display:flex}.volume-control{color:var(--muted);align-items:center;gap:6px;display:flex}.volume-control .range{width:84px}.range{--fill:0%;appearance:none;cursor:pointer;background:0 0;width:100%;height:16px;margin:0}.range::-webkit-slider-runnable-track{background:linear-gradient(90deg, var(--accent) var(--fill), var(--panel-3) 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