:root {
  /* Form language: structural surfaces are HARD. Full roundness is reserved for
     the crest/seal only — never for buttons, cards, badges or tiles. */
  --radius: 3px;             /* shadcn base */
  --radius-sm: 2px;          /* meter bars, chips, badges */
  --radius-md: 3px;          /* buttons, inputs, icon plates */
  --radius-lg: 3px;          /* alias of md — kept for existing call sites */
  --radius-xl: 4px;          /* cards */
  --radius-2xl: 6px;         /* large panels, pricing, hero device */
  --radius-button: 10px;     /* buttons + inputs — softer than the surfaces */
  --radius-pill: 9999px;     /* RESERVED — the crest mark only */
}