:root{--bg: #1b1e24;--panel: #23262e;--panel-2: #2a2e38;--text: #e6e8ee;--muted: #9aa0ac;--accent: #4f9cf9;--accent-dim: #2c5f9e;--danger: #e05252;--ok: #3fb96a;--border: #363b46;--note-color: #6db9ff;--note-selected: #ffd76e;--row-black: #1e222b;--row-white: #242834}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,Segoe UI,Microsoft YaHei,PingFang SC,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{display:flex;flex-direction:column;height:100vh}.home-header{display:flex;align-items:center;gap:12px;padding:10px 24px;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.home-header-spacer{flex:1}.home-body{max-width:1280px;margin:0 auto;padding:24px 24px 64px}.brand{font-size:16px;font-weight:600}.health-badge{font-size:12px;color:var(--muted);white-space:nowrap}.health-badge.ok:before{content:"● ";color:var(--ok)}.health-badge.err:before{content:"● ";color:var(--danger)}.health-badge 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28px;height:60%;margin-left:-14px;margin-right:-14px;z-index:2}.piano-key.active{background:var(--note-selected)}.key-label{position:absolute;bottom:4px;left:0;right:0;font-size:10px;color:#666;pointer-events:none}.lyrics-add{display:flex;gap:6px;margin-bottom:8px}.lyrics-add input{flex:1;font-size:15px;padding:8px 10px}.bind-hint{background:var(--accent-dim);padding:6px 8px;border-radius:6px;font-size:12px;margin-bottom:8px}.lyrics-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.lyric-phrase{border:1px solid var(--border);border-radius:8px;padding:10px}.phrase-tools{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:8px;align-items:center}.phrase-tools button{padding:2px 6px;font-size:12px}.tag{font-size:11px;padding:2px 6px;border-radius:8px;background:var(--accent-dim);color:#fff}.phrase-tokens{display:flex;flex-wrap:wrap;gap:2px 4px;align-items:baseline;line-height:1.6}.token{padding:2px 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8px;border-radius:10px;margin-bottom:6px}.coach-provider.cloud{background:var(--accent-dim);color:#fff}.coach-provider.local{background:var(--panel);color:var(--muted)}.coach-proposals{margin:4px 0;padding-left:18px;font-size:12px}.coach-proposals li{margin:2px 0}.coach-error{font-size:12px;color:var(--danger);margin:4px 0}.settings-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100}.settings-panel{width:min(720px,92vw);max-height:88vh;overflow:auto;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px 20px}.settings-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.settings-head h2{margin:0;font-size:16px}.settings-section{margin:14px 0}.settings-section h3{font-size:12px;color:var(--muted);margin:0 0 8px;text-transform:uppercase;border-bottom:1px solid 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4px);right:0;z-index:500;display:flex;flex-direction:column;min-width:168px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:4px;box-shadow:0 10px 28px #00000073}.dropdown-menu button,.dropdown-menu [role=menuitem]{text-align:left;background:transparent;border:none;padding:7px 10px;border-radius:5px;font-size:13px;color:var(--text)}.dropdown-menu button:hover,.dropdown-menu [role=menuitem]:hover{background:var(--accent-dim);color:#fff}.dropdown-menu .menu-sep{height:1px;background:var(--border);margin:4px 0}.dropdown-menu .menu-label{font-size:11px;color:var(--muted);padding:4px 10px 2px}.studio-modal-overlay{position:fixed;inset:0;z-index:800;background:#0000008c;display:flex;align-items:center;justify-content:center}.studio-modal{width:460px;max-width:92vw;max-height:84vh;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:0 18px 48px 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h3{font-size:12px;color:var(--muted);margin:12px 0 4px;text-transform:uppercase}.section-list ul{list-style:none;padding:0;margin:0}.help-panel h3{margin-top:0}.coach-subtitle{font-size:12px;color:var(--muted);margin:-2px 0 8px}.coach-quick{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:6px 0}.coach-quick button{font-size:12px;padding:6px 8px}.coach-hint{font-size:12px;color:var(--accent);margin:4px 0}.piano-show{font-size:12px;padding:3px 12px}.lyrics-empty-cta{margin-top:12px}