:root{--bg: #0d1117;--bg-elevated: #161b22;--bg-cell: #1e252e;--bg-cell-hover: #29313c;--border: #2a313b;--border-strong: #3a424d;--text: #e6edf3;--text-dim: #8b949e;--accent: #ff7849;--accent-dim: #b34d29;--playhead: #f1e05a;--danger: #d44a4a;--solo: #f1c84e}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}.app{margin:0 auto;padding:14px 18px 60px;min-height:100vh}.topbar{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;background:var(--bg-elevated);padding:12px 16px;border-radius:10px;border:1px solid var(--border);margin-bottom:12px}.topbar .brand{font-size:16px;font-weight:700;color:var(--accent);letter-spacing:.5px;margin-right:auto}.transport,.controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.controls 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