/* Build CTO spacing & layout. 8px base (shared with CTOHA); 24px engineering unit drives grid texture.
   Denser than the association: 72px header, 1280px container, 5rem sections. */
:root{
  --space-1:0.25rem;
  --space-2:0.5rem;
  --space-3:0.75rem;
  --space-4:1rem;
  --space-5:1.5rem;
  --space-6:2rem;
  --space-7:3rem;
  --space-8:4rem;
  --space-9:5rem;
  --space-10:7rem;
  --bc-unit:24px;              /* engineering grid unit */
  --section-pad:var(--space-9);
  --container-max:1280px;
  --container-pad:clamp(1.25rem,4vw,2.5rem);
  --header-h:72px;
  --card-pad:20px;
  --gutter:16px;               /* catalog grid gutter */
}