:root{
  --radius-xs:4px;
  --radius-sm:8px;
  --radius-md:10px;   /* form fields */
  --radius-lg:14px;   /* content cards */
  --radius-xl:20px;   /* panels, form containers */
  --radius-2xl:28px;  /* full-bleed media frames */
  --radius-pill:999px; /* every button and badge */
  --border-w:1px;
  --border-w-thick:2px;
}