/* RADIUS from lib/theme.js — deliberately large/varied to read friendly. */
:root{
  --radius-sm:12px;   /* photos, thumbnails */
  --radius-md:20px;   /* buttons, inputs, tiles, message bubbles */
  --radius-lg:28px;   /* tinted section cards, list rows */
  --radius-pill:999px;/* chips, badges, avatars, day circles */
}