:root{
--radius-0:0px;
--radius-1:2px;   /* terminal controls: near-square */
--radius-2:3px;
--radius-3:4px;   /* default control radius, marketing buttons */
--radius-4:6px;
--radius-5:8px;   /* cards */
--radius-6:12px;  /* large feature cards */
--radius-pill:999px;
--radius-circle:50%;
}