/* ============================================================
   gasbase — Spacing, radius, elevation, layout tokens
   Disciplined 4px base grid. Restrained radii (engineering,
   not playful). Shadows are soft and cool, never heavy.
   ============================================================ */

:root {
  /* Spacing — 4px base */
  --gb-space-0: 0;
  --gb-space-1: 4px;
  --gb-space-2: 8px;
  --gb-space-3: 12px;
  --gb-space-4: 16px;
  --gb-space-5: 20px;
  --gb-space-6: 24px;
  --gb-space-8: 32px;
  --gb-space-10: 40px;
  --gb-space-12: 48px;
  --gb-space-16: 64px;
  --gb-space-20: 80px;
  --gb-space-24: 96px;
  --gb-space-32: 128px;

  /* Radii — modest, technical */
  --gb-radius-xs: 3px;
  --gb-radius-sm: 6px;
  --gb-radius-md: 10px;
  --gb-radius-lg: 14px;
  --gb-radius-xl: 20px;
  --gb-radius-pill: 999px;

  /* Borders */
  --gb-border-width: 1px;
  --gb-border-width-strong: 2px;

  /* Elevation — soft, cool-tinted */
  --gb-shadow-xs: 0 1px 2px rgba(15,27,36,0.06);
  --gb-shadow-sm: 0 2px 6px rgba(15,27,36,0.07), 0 1px 2px rgba(15,27,36,0.05);
  --gb-shadow-md: 0 6px 18px rgba(15,27,36,0.09), 0 2px 5px rgba(15,27,36,0.05);
  --gb-shadow-lg: 0 18px 42px rgba(15,27,36,0.13), 0 6px 14px rgba(15,27,36,0.07);
  --gb-shadow-focus: 0 0 0 3px rgba(78,154,196,0.45);

  /* Layout */
  --gb-container: 1240px;
  --gb-container-narrow: 880px;
  --gb-gutter: 24px;
}