*{box-sizing:border-box}:root{--bg: #0f1117;--surface: #181b23;--surface2: #21252f;--border: #2e3340;--text: #e7e9ee;--muted: #9aa1af;--accent: #5b8cff;--accent-strong: #3f6fe8;--danger: #e5606c;--warn: #e0a83f}body{margin:0;background:var(--bg);color:var(--text);font-family:Pretendard,Apple SD Gothic Neo,Noto Sans KR,system-ui,sans-serif;line-height:1.5}.app-header{display:flex;align-items:baseline;gap:12px;padding:14px 24px;border-bottom:1px solid var(--border)}.brand{background:none;border:none;color:var(--text);font-size:20px;font-weight:800;cursor:pointer;padding:0}.tagline{color:var(--muted);font-size:13px}.page{max-width:1080px;margin:0 auto;padding:24px}.page.narrow{max-width:640px}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.page-head h1{margin:0;font-size:22px}.muted{color:var(--muted);font-size:13px}.btn{background:var(--surface2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:8px 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1 320px}.capo-field{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}.capo-field input{width:56px}.save-state{font-size:12px;color:var(--muted)}.save-state.saved{color:#6fbf82}.draft-notice{margin:14px 0;padding:10px 14px;background:#e0a83f1a;border:1px solid rgba(224,168,63,.4);border-radius:10px;font-size:13px}.player-bar{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 16px;position:sticky;top:8px;z-index:5}.seek-bar{flex:1;accent-color:var(--accent);padding:0;border:none;background:none}.time-display{font-variant-numeric:tabular-nums;font-size:13px;color:var(--muted);white-space:nowrap}.current-chord{font-size:22px;font-weight:800;min-width:64px;text-align:center;color:var(--accent)}.timeline{display:flex;flex-wrap:wrap;gap:6px;margin:18px 0}.segment{display:flex;flex-direction:column;align-items:flex-start;gap:2px;background:var(--surface);border:1px solid 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