:root {
  /* ---- Spacing scale (4px base) ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* CTA buttons use generous symmetric padding (~25px) */
  --cta-padding-y: 22px;
  --cta-padding-x: 28px;

  /* ---- Radius ---- (brand is square; corners are 0) */
  --radius-none: 0px;
  --radius-sm: 2px;        /* rare, for soft chips */
  --radius-pill: 999px;

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

  /* ---- Shadows ---- (used sparingly; flat, soft) */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-raised: 0 4px 16px rgba(0, 0, 0, 0.10);

  /* ---- Layout ---- */
  --container-max: 1080px;
  --container-wide: 1280px;
  --side-nav-width: 56px;   /* fixed right-edge CTA rail (PC) */
}