:root{
  /* "Cantos discretamente arredondados ou retos." Interface corners stay tight;
     the pill radius belongs to the logo's flow motif, not to UI containers. */
  --r-0:0px; --r-xs:2px; --r-sm:3px; --r-md:5px; --r-lg:8px; --r-xl:12px;
  --r-pill:999px;

  --r-control:5px;   /* buttons, inputs, selects */
  --r-surface:6px;   /* cards, panels, table shells */
  --r-overlay:8px;   /* dialogs, menus, popovers */
  --r-badge:3px;     /* status badges stay near-square */
}