:root {
  /* Warm parchment + deep jade */
  --color-bg: #F7F5F0;
  --color-bg-alt: #EFECE5;
  --color-surface: #FFFFFF;
  --color-text-primary: #1A2420;
  --color-text-secondary: #5A6B65;
  --color-text-inverse: #FFFFFF;
  --color-accent: #0F766E;
  --color-accent-hover: #0B5A54;
  --color-border: #D8D3C9;
  --color-border-strong: #A8A298;
  --color-focus: #0F766E;

  /* High-contrast overrides */
  --hc-bg: #FFFFFF;
  --hc-text: #000000;
  --hc-accent: #005A52;
  --hc-border: #000000;

  /* Typography — Archivo headings, IBM Plex Sans body */
  --font-heading: 'Archivo', 'Helvetica Neue', sans-serif;
  --font-body: 'IBM Plex Sans', 'Helvetica Neue', sans-serif;
  --font-ui: 'Archivo', 'Helvetica Neue', sans-serif;

  /* Fluid type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.25rem, 1rem + 1vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-2xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --text-3xl: clamp(2.5rem, 1.8rem + 3.5vw, 4rem);

  /* Line heights */
  --leading-tight: 1.15;
  --leading-normal: 1.65;
  --leading-loose: 1.85;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 600ms ease-out;
}