:root{--bg:#f4f6f9;--surface:#fff;--ink:#0b1f3a;--muted:#64748b;--border:#e2e8f0;--l1:#c97a2b;--l2:#1b7a72;--l3:#4a5fc1;--danger:#c23b3b}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:IBM Plex Sans,sans-serif}.mono{font-variant-numeric:tabular-nums;font-family:IBM Plex Mono,monospace}