:root {
  /* Colors — three values only */
  --color-bg: #FFFFFF;
  --color-accent: #ED1B24;
  --color-text: #000000;

  /* Inversions and scrim — the only permitted variations */
  --color-on-image: #FFFFFF;
  --color-scrim-strong: rgba(0, 0, 0, 0.55);
  --color-scrim-soft: rgba(0, 0, 0, 0);
  --color-border: #000000;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;

  /* Type scale */
  --text-xs: 13px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 20px;
  --text-md: 32px;
  --text-xl: clamp(30px, 6vw, 44px);
  --text-2xl: clamp(36px, 8vw, 72px);

  /* Weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --weight-extrabold: 800;

  /* Heading style */
  --heading-letter-spacing: -0.02em;
  --heading-letter-spacing-display: -0.03em;
  --heading-line-height: 1.1;

  /* Spacing — 4-point grid */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --space-32: 128px;

  /* Transitions */
  --transition-base: 300ms ease;
  --transition-slow: 600ms ease;

  /* Layout */
  --max-width: 1440px;
  --measure-prose: 700px;
  --measure-hero: 800px;
  --header-height: 72px;
  --footer-height: 72px;
}