:root {
  /* Brand colours */
  --heritage-green: #1a4731;
  --green-dark: #0f2d1e;
  --green-light: #2d6b4a;
  --patina-gold: #c4922a;
  --gold-dark: #795918;
  --cream: #f5efe0;
  --paper: #f7f8f5;
  --white: #ffffff;
  --ink: #1a1a1a;
  --muted: #656863;
  --line: #d9ddd7;
  --soft-green: #dce7df;
  --sky: #c9e0e5;
  --clay: #bd5a43;
  --error: #8b2020;

  /* Typography */
  --font-display: Georgia, "Times New Roman", serif;
  --font-ui: "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  /* Layout and spacing */
  --shell: 1440px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Shape, elevation and motion */
  --radius-small: 2px;
  --radius-control: 3px;
  --shadow-small: 0 2px 10px rgba(15, 45, 30, 0.1);
  --shadow-large: 0 16px 48px rgba(15, 45, 30, 0.16);
  --motion-fast: 160ms;
  --motion-standard: 220ms;
  --motion-page: 650ms;
  --ease-standard: ease;
  --ease-emphasized: cubic-bezier(0.16, 1, 0.3, 1);
}