:root{
/* Tight by policy. Nothing in this system is blobby; 3px and 6px do almost all
   the work, 14px is the largest allowed on a surface, pill only on tags. */
--radius-0:0px;
--radius-1:3px;
--radius-2:6px;
--radius-3:10px;
--radius-4:14px;
--radius-pill:999px;
--border-hair:1px;
--border-thick:2px;
}