:root {
  /* Spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Layout */
  --container-max: 1440px;
  --gutter: 80px;        /* lg horizontal padding (px-20) */
  --gutter-sm: 20px;

  /* Radii */
  --radius-sm: 6px;      /* buttons, inputs (rounded-md) */
  --radius-md: 8px;      /* CTA buttons (rounded-lg) */
  --radius-lg: 16px;
  --radius-xl: 20px;     /* dashboard panels */
  --radius-2xl: 24px;
  --radius-full: 9999px; /* pills, avatars */

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,10,64,0.05);
  --shadow-sm: 0 1px 3px rgba(0,10,64,0.08), 0 1px 2px rgba(0,10,64,0.04);
  --shadow-md: 0 6px 16px rgba(0,10,64,0.08);
  --shadow-lg: 0 18px 40px rgba(0,10,64,0.12);
  --shadow-yellow: 0 10px 24px rgba(255,199,0,0.35);

  /* Focus ring */
  --ring: 0 0 0 2px #FFFFFF, 0 0 0 4px var(--navy-900);
}