:root{
  /* The enclosure is a soft-cornered steel box; the UI mirrors it with small,
     restrained radii. Nothing is pill-shaped except the DE/EN language chips. */
  --radius-0:0px;
  --radius-1:2px;
  --radius-2:3px;
  --radius-3:5px;
  --radius-4:8px;
  --radius-5:12px;
  --radius-pill:999px;

  --border-1:1px;
  --border-2:2px;
  --hairline:1px solid var(--border-hairline);
  --rule-brand:1px solid var(--border-brand);
}