:root {
  /* Colours */
  --bg-primary: #FAFAF8;
  --bg-section-alt: #F2F1EE;
  --bg-card: #FFFFFF;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #6b6b6b;
  --accent: #3d5a80;
  --accent-hover: #2c4460;
  --border: #d4d4cf;
  --border-light: #e8e8e4;

  /* Tag colours */
  --tag-op-ed: #e8ddd4;
  --tag-op-ed-text: #6b4c2a;
  --tag-policy: #d4dde8;
  --tag-policy-text: #2a4c6b;
  --tag-working-paper: #e0e0dc;
  --tag-working-paper-text: #4a4a4a;
  --tag-newsletter: #d4e8db;
  --tag-newsletter-text: #2a6b3d;
  --tag-thesis: #e0d4e8;
  --tag-thesis-text: #4c2a6b;
  --tag-report: #d4e2e8;
  --tag-report-text: #2a5a6b;

  /* Typography */
  --font-heading: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 2rem;
  --fs-4xl: 2.5rem;

  --lh-tight: 1.2;
  --lh-normal: 1.6;
  --lh-relaxed: 1.8;

  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;

  /* Layout */
  --container-max: 840px;
  --container-wide: 960px;
  --nav-height: 64px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
}