:root {
  /* Colour — premium navy / ivory / champagne */
  --color-navy: #071a33;
  --color-navy-alt: #081b33;
  --color-navy-text: #0a1b32;
  --color-ivory: #f6f3ec;
  --color-white: #ffffff;
  --color-gold: #c6a15b;
  --color-gold-hover: #b08d48;
  --color-gold-on-light: #7a5c28;
  --color-text-muted: #3e4f66;
  --color-border-beige: #ddd8cc;

  /* Aliases used by existing section stylesheets */
  --color-bg: var(--color-ivory);
  --color-surface: var(--color-white);
  --color-text: var(--color-navy-text);
  --color-muted: var(--color-text-muted);
  --color-accent: var(--color-gold);
  --color-accent-dark: var(--color-gold-hover);
  --color-border: var(--color-border-beige);

  /* Typography — system stacks (no webfonts) */
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua",
    Georgia, "Times New Roman", serif;
  --font-sans: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial,
    sans-serif;

  --text-h1: clamp(2.5rem, 1.6rem + 4vw, 4rem);
  --text-h2: clamp(1.85rem, 1.2rem + 2.2vw, 2.75rem);
  --text-h3: clamp(1.375rem, 1.15rem + 0.9vw, 1.75rem);
  --text-body: 1rem;
  --text-eyebrow: clamp(0.625rem, 0.58rem + 0.2vw, 0.6875rem);
  --text-nav: clamp(0.6875rem, 0.65rem + 0.15vw, 0.75rem);
  --text-button: clamp(0.6875rem, 0.65rem + 0.15vw, 0.75rem);

  --leading-h1: 1.02;
  --leading-h2: 1.1;
  --leading-h3: 1.2;
  --leading-body: 1.7;
  --leading-tight: 1.3;

  --tracking-eyebrow: 0.22em;
  --tracking-nav: 0.16em;
  --tracking-button: 0.14em;

  /* Layout */
  --max-width: 76.25rem;
  --page-gutter: clamp(1.25rem, 4vw, 2.5rem);
  --header-height: 4.5rem;

  /* Spacing */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 6.5rem;

  --section-padding: clamp(3.5rem, 6vw, 6.5rem);
  --section-padding-mobile: 3.5rem;
  --card-gap: clamp(1.25rem, 3vw, 1.75rem);
  --card-padding: clamp(1.25rem, 2.5vw, 2rem);
  --stack-gap: 1.25rem;

  /* Shape & motion */
  --radius: 0;
  --radius-none: 0;
  --duration: 180ms;
  --ease: ease;
  --focus-ring: 2px solid var(--color-gold);
  --focus-offset: 3px;
}