:root{
/* Radius is a signal, not a texture. Four distinct values, never blended. */
--r-stamp:0px;          /* stamps, labels, tables — hard corners */
--r-input:8px;          /* fields, chips */
--r-media:18px;         /* images, ad mocks inside a colour field */
--r-card:30px;          /* standard card */
--r-card-lg:48px;       /* hero and anchor cards */
--r-pill:999px;         /* buttons only */
--stroke:1.5px; /* @kind spacing */
--stroke-heavy:2.5px; /* @kind spacing */
}