:root{--bg: #fafafa;--surface: #ffffff;--text: #1d1d1f;--muted: #6e6e73;--line: #e2e2e6;--accent: #2563eb;--accent-soft: #dbe6fd;--bass: #d97706;--danger: #dc2626;--hint: #ef4444;--playing: #fde68a;font-family:-apple-system,BlinkMacSystemFont,PingFang TC,Noto Sans TC,sans-serif;font-size:14px;color:var(--text);background:var(--bg)}@media(prefers-color-scheme:dark){:root{--bg: #161618;--surface: #1f1f22;--text: #ececef;--muted: #9a9aa2;--line: #34343a;--accent: #60a5fa;--accent-soft: #1e3a5f;--bass: #f59e0b;--playing: #6b5b1a}}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,select,textarea{font:inherit;color:inherit}button{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:4px 10px;cursor:pointer}button:hover:not(:disabled){border-color:var(--accent)}button:disabled{opacity:.4;cursor:default}button.small{padding:2px 8px;font-size:12px}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.danger{color:var(--danger)}button.armed{background:var(--danger);border-color:var(--danger);color:#fff}input,select,textarea{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:4px 8px}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}input[type=checkbox]{margin:0 4px 0 0;vertical-align:-2px}h3{font-size:14px;margin:0 0 8px}h4{font-size:13px;margin:14px 0 6px}.muted{color:var(--muted)}.small{font-size:12px}.error{color:var(--danger)}.row{display:flex;align-items:center;gap:6px}.row.gap{gap:8px;flex-wrap:wrap}.spacer{flex:1}.app{display:grid;grid-template-columns:200px minmax(0,1fr) 400px;height:100vh}.sidebar,.panel{overflow-y:auto;padding:14px;background:var(--surface)}.sidebar{border-right:1px solid var(--line)}.panel{border-left:1px solid var(--line)}.main{overflow-y:auto;padding:18px 24px 60px}@media(max-width:1000px){.app{grid-template-columns:1fr;height:auto}.sidebar,.panel{border:none;border-bottom:1px solid var(--line)}.main{padding:14px 16px 40px}}.sheet-list ul{list-style:none;margin:8px 0 0;padding:0}.sheet-list li{display:flex;align-items:center;gap:6px;padding:6px 8px;border-radius:6px;cursor:pointer}.sheet-list li:hover{background:var(--bg)}.sheet-list li.active{background:var(--accent-soft)}.sheet-list .title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sheet-title{font-size:22px;font-weight:600;border:none;background:transparent;padding:2px 0;width:100%;margin-bottom:8px}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px}.toolbar label{display:inline-flex;align-items:center;gap:4px}.toolbar .sep{width:1px;height:20px;background:var(--line)}.num{width:64px}.segmented{display:inline-flex}.segmented button{border-radius:0;margin-left:-1px}.segmented button:first-child{border-radius:6px 0 0 6px}.segmented button:last-child{border-radius:0 6px 6px 0}.segmented button.active{background:var(--accent-soft);border-color:var(--accent);position:relative}.section{margin-top:16px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}.section.active{border-color:var(--accent)}.section-name{font-weight:600;border:none;background:transparent;width:8em;padding:2px 0}.section-body{margin-top:8px;min-height:24px}.section-editor textarea{width:100%;margin-top:8px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:14px;line-height:1.6}.errors{margin:6px 0;padding-left:18px;color:var(--danger);font-size:12px}.add-section{margin-top:16px}.grid-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-right:2px solid var(--text)}.grid-row+.grid-row{margin-top:6px}.measure{border-left:2px solid var(--text);min-height:52px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-around;gap:2px;padding:2px 4px}.measure.empty{opacity:.3}.measure.timed{position:relative;flex-wrap:nowrap;justify-content:flex-start;padding:2px 0}.beat-slot{display:flex;align-items:center;min-width:0}.beat{flex:1 1 0;min-width:0;display:flex;justify-content:center}.beat.dot{color:var(--muted);font-size:18px}.bar-len{position:absolute;top:1px;left:4px;font-size:10px;color:var(--muted)}.chord{position:relative;border:1px solid transparent;background:transparent;padding:2px 6px;min-width:0}.chord:hover{border-color:var(--line)}.chord.selected{border-color:var(--accent);background:var(--accent-soft)}.chord.playing{background:var(--playing)}.hint-dot{position:absolute;top:2px;right:2px;width:6px;height:6px;border-radius:50%;background:var(--hint)}.chord-label{display:inline-flex;flex-direction:column;align-items:center;line-height:1.2}.chord-label .abs{font-weight:600;font-size:16px;white-space:nowrap}.chord-label .rel{font-size:12px;color:var(--muted);white-space:nowrap}.lyric-line{display:flex;flex-wrap:wrap;align-items:flex-end;margin-bottom:6px}.lyric-line.blank{height:14px}.seg{display:inline-flex;flex-direction:column;align-items:flex-start}.seg-chord{min-height:22px;margin-right:6px}.seg-chord .chord{padding:0 2px;margin-left:-2px}.seg-text{white-space:pre;font-size:15px}.panel-block{padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--line)}.panel-block:last-child{border-bottom:none}.search{width:100%;flex:1}.panel-block>p{margin:6px 0}.results{list-style:none;margin:6px 0 0;padding:0}.results li{display:flex;align-items:center;gap:8px;padding:4px 6px;border-radius:6px;cursor:pointer}.results li:hover{background:var(--bg)}.results li.error{cursor:default;font-size:12px}.results .notes{font-size:12px}.chord-names{display:inline-flex;gap:8px;align-items:baseline}.chord-names b{font-size:15px}.palette{margin-top:10px}.palette-row{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}.chip{padding:2px 6px}.chip .chord-label .abs{font-size:13px}.chip .chord-label .rel{font-size:11px}.detail-title{display:flex;align-items:baseline;gap:10px;margin-bottom:8px}.detail-title .chord-names b{font-size:22px}.tones{border-collapse:collapse;margin-bottom:10px;font-size:13px}.tones th{text-align:left;font-weight:400;color:var(--muted);padding-right:10px;white-space:nowrap}.tones td{padding:1px 8px;text-align:center;min-width:30px}.instrument{margin-bottom:8px}.piano{width:100%;height:auto;display:block;margin:6px 0}.piano .white{fill:#fff;stroke:#999}.piano .black{fill:#222;stroke:#222}.piano .on{fill:var(--accent)}.piano .bass{fill:var(--bass)}.piano .clickable{cursor:pointer}.piano .clickable:hover:not(.on):not(.bass){fill:var(--accent-soft)}.piano text{pointer-events:none;font-size:10px}.piano .key-label{fill:#fff;font-weight:600}.piano .key-sub{fill:#fff;font-size:9px}.piano .on-black{font-size:7px}.piano .key-c{fill:#999;font-size:8px}.suggestions ul{list-style:none;margin:0;padding:0}.suggest-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.suggestions li{padding:6px 8px;border:1px solid var(--line);border-radius:6px;margin-bottom:6px}.suggestions li.strong{border-left:3px solid var(--hint)}.suggestions .tag{font-size:11px;padding:1px 6px;border-radius:4px;background:var(--accent-soft);white-space:nowrap}.suggestions .result{display:inline-flex;gap:6px}.suggestions .result .chord-label .abs{font-size:14px}.suggestions .detail{font-size:12px;color:var(--muted);margin-top:4px}.tabs{display:flex;gap:4px}.tabs button.active{background:var(--accent-soft)}.beats-row{margin:4px 0 8px}.beats-row b{min-width:1.5em;text-align:center}.drum-bar input[type=range]{width:80px;vertical-align:middle}.num-label{display:inline-block;width:3em;font-variant-numeric:tabular-nums}.kit{margin-bottom:8px}.kit summary{cursor:pointer;margin-bottom:6px}