:root {
  /* ---- Spacing (8px base + documented one-off alignment values) ---- */
  --space-2: 2px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-22: 22px;
  --space-24: 24px;
  --space-28: 28px;
  --space-32: 32px;
  --space-36: 36px;
  --space-40: 40px;
  --space-56: 56px;
  --space-60: 60px;
  --space-64: 64px;
  --space-80: 80px;

  /* ---- Radius scale ---- */
  --radius-xs: 4px;     /* small images, search fields, thumbnails */
  --radius-sm: 8px;     /* chips, cards, small media, dialogs */
  --radius-md: 16px;    /* medium product cards, grouped blocks */
  --radius-lg: 22px;    /* signature media-card radius */
  --radius-xl: 30px;    /* research / topic filter pills */
  --radius-pill: 32px;  /* primary CTA buttons */
  --radius-full: 9999px;/* round status elements, full pills */

  /* ---- Borders ---- */
  --border-width: 1px;

  /* ---- Elevation (Cohere is mostly flat; depth = surface + border + radius) ---- */
  --shadow-none: none;
  --shadow-media: 0 2px 8px rgba(0, 0, 0, 0.06);  /* subtle media-card lift, used sparingly */
}