/* SBOS — Elevation & depth
 * Tonal layering + structural outlines over heavy shadows.
 * Level 0 surface · Level 1 cards (steel border + soft diffusion) · Level 2 modals.
 */
:root {
  /* Soft, high-diffusion shadows tinted with navy */
  --shadow-sm: 0 1px 2px rgba(0, 32, 69, 0.04);
  --shadow-card: 0 4px 20px rgba(0, 32, 69, 0.05);      /* Level 1 — cards */
  --shadow-md: 0 6px 24px rgba(0, 32, 69, 0.08);        /* hover lift */
  --shadow-lg: 0 12px 40px rgba(0, 32, 69, 0.12);       /* Level 2 — modals/overlays */
  --shadow-xl: 0 24px 60px rgba(0, 32, 69, 0.18);

  /* Focus ring — amber, technical */
  --focus-ring: 0 0 0 2px rgba(254, 166, 25, 0.55);

  /* Structural accents */
  --edge-priority: var(--border-emphasis) solid var(--sbos-navy); /* Level-2 top edge */
}