:root{
  /* Restrained radii — administrative software, not consumer app. */
  --radius-none:0px;
  --radius-xs:3px;
  --radius-sm:4px;
  --radius-md:6px;
  --radius-lg:10px;
  --radius-xl:14px;
  --radius-pill:999px;
  --radius-control:6px;   /* buttons, inputs, selects */
  --radius-card:10px;     /* cards, panels, modals */
  --radius-badge:999px;   /* status pills */
}