:root{
  --radius-xs:4px;
  --radius-sm:6px;    /* spec chips, contact pills */
  --radius-md:8px;    /* buttons, inputs, small tiles */
  --radius-lg:10px;   /* cards, panels */
  --radius-xl:14px;   /* dark bands, map banner */
  --radius-pill:999px;/* location pill, badges */
}