: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}.app-header{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border)}.brand{font-size:16px;font-weight:600}.health-badge{font-size:12px;color:var(--muted)}.health-badge.ok:before{content:"● ";color:var(--ok)}.health-badge.err:before{content:"● ";color:var(--danger)}.health-badge .mode{color:var(--muted)}.app-main{flex:1;overflow:auto}button{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 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16px}.home-empty{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:24px}.home-empty p{color:var(--muted);margin:0 0 16px}.home-active{display:flex;flex-direction:column;gap:16px}.home-today{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}.home-today-label{margin:0 0 4px;font-size:12px;color:var(--muted)}.home-today-task{margin:0 0 8px;font-size:16px}.home-teacher{margin:0 0 16px;color:var(--muted);font-size:13px}.home-actions{display:flex;gap:10px;flex-wrap:wrap}.create-row input{flex:1}.project-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}.project-item{display:flex;gap:8px;align-items:stretch}.project-open{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:12px 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8px}.muted-hint{font-size:11px;color:var(--muted)}.piano{display:flex;height:140px;background:var(--panel);border-top:1px solid var(--border);padding:4px;overflow-x:auto}.piano-key{position:relative;flex:0 0 40px;border-radius:0 0 4px 4px;border:1px solid #111;padding:0}.piano-key.white{background:#f4f5f7;color:#333}.piano-key.black{background:#181a1f;color:#fff;flex:0 0 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 4px;font-size:16px;line-height:1.6;border-radius:4px;border:1px solid transparent;background:transparent}.token.punct{color:var(--muted);font-size:12px;padding:3px 2px}.token.bound{background:var(--accent-dim);border-color:var(--accent)}.token.needs-review{background:transparent;border-color:var(--danger);border-style:dashed}.token.binding{outline:2px solid var(--note-selected)}.token sup{font-size:9px}.bind-selected{font-size:11px;color:var(--muted);border-style:dashed}.phrase-edit{display:flex;gap:4px}.phrase-edit 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button{font-size:12px}.app-header-spacer{flex:1}.coach-ai{margin-top:16px;border-top:1px solid var(--border);padding-top:4px}.coach-consent{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin:4px 0}.coach-ai-btns{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0}.coach-ai-btns button{font-size:12px;padding:4px 10px}.coach-stuck{display:flex;flex-direction:column;gap:4px;margin:4px 0}.coach-stuck textarea{width:100%;background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:4px;padding:6px;font-size:12px;resize:vertical}.coach-stuck button{align-self:flex-end;font-size:12px}.coach-cloud{margin:8px 0 0;border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:6px;padding:12px;background:var(--panel-2)}.coach-answer{font-size:15px;line-height:1.6}.coach-answer .coach-keep{font-size:15px;color:var(--ok);margin:8px 0 6px}.coach-answer .coach-focus{font-size:15px;margin:6px 0}.coach-answer 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.err{color:var(--danger);font-size:12px}.note.ghost-note{background:#ff660047;border:1px dashed var(--accent);pointer-events:none;opacity:.85}.teacher-card{border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:8px;background:var(--panel-2);padding:10px 14px;margin-bottom:8px}.teacher-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.teacher-title{font-weight:600}.teacher-lesson{color:var(--muted);font-size:12px}.teacher-toggle{margin-left:auto;font-size:12px}.teacher-detail{margin-top:6px}.teacher-provider{display:inline-block;font-size:11px;padding:2px 8px;border-radius:10px}.teacher-provider.cloud{background:var(--accent-dim);color:#fff}.teacher-provider.local{background:var(--panel);color:var(--muted)}.teacher-objective{margin:6px 0 4px;font-size:13px}.teacher-answer{font-size:15px;line-height:1.6}.teacher-keep{color:var(--ok);margin:4px 0}.teacher-focus{margin:4px 0}.teacher-note{font-size:12px;color:var(--muted);margin:4px 0}.teacher-error{font-size:12px;color:var(--danger);margin:4px 0}.teacher-proposals{display:flex;flex-direction:column;gap:8px;margin:8px 0}.teacher-proposal{border:1px solid var(--border);border-radius:6px;padding:8px 10px;background:var(--panel)}.teacher-proposal.accepted{opacity:.75}.teacher-proposal .tag{font-size:11px;color:var(--accent);margin-right:6px}.proposal-desc{margin:4px 0;font-size:14px}.proposal-detail{margin:4px 0;font-size:13px;color:var(--muted);font-family:Consolas,monospace}.proposal-actions{display:flex;gap:6px;margin-top:6px}.proposal-actions button{font-size:12px}.teacher-triggers{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.teacher-triggers button{font-size:12px}.teacher-stuck{display:flex;flex-direction:column;gap:6px;margin:8px 0 0}.teacher-stuck textarea{width:100%;background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:4px;padding:6px;font-size:13px;resize:vertical}.teacher-stuck button{align-self:flex-end;font-size:12px}.milestone-card{border:1px solid var(--border);border-radius:8px;padding:10px 12px;background:var(--panel-2);margin-bottom:8px}.milestone-card h3{margin:0 0 4px}.milestone-lesson{font-size:12px;color:var(--muted);margin:0 0 8px}.milestone-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.milestone{display:flex;align-items:center;gap:6px;font-size:12px}.milestone-dot{width:8px;height:8px;border-radius:50%;background:var(--border);flex:none}.milestone-dot.forming{background:#e0a13f}.milestone-dot.first-draft{background:var(--accent)}.milestone-dot.refining{background:#7a5fd0}.milestone-dot.done{background:var(--ok)}.milestone-label{flex:1}.milestone-state{color:var(--muted)}.milestone-state.done{color:var(--ok)}.coach-question{width:100%;box-sizing:border-box;background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:4px;padding:6px 8px;font-size:13px;resize:vertical;margin:6px 0}