:root{
  --bg:#0b0f14; --card:#121a23; --text:#e7edf5; --muted:#9aa7b5; --border:#243041;
  --good:#22c55e; --warn:#f59e0b; --bad:#ef4444;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --r: 16px; --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;

  /* HUD / Tactical overlay */
  --cyan: #00d4ff;
  --cyan-dim: rgba(0, 212, 255, 0.12);
  --cyan-mid: rgba(0, 212, 255, 0.35);
  --cyan-glow: 0 0 16px rgba(0, 212, 255, 0.3);
  --bracket: 18px;
}

/* Light mode */
[data-theme="light"]{
  --bg:#f5f7fa; --card:#ffffff; --text:#1a202c; --muted:#64748b; --border:#cbd5e1;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
}