/* Design tokens (owner: Designer). Calm and simple.
   Palette: warm paper ground; Rhine blue-green as the main voice;
   Münster sandstone red as the accent (the cathedral's red stone).
   Type: Georgia headings, system sans body. No web fonts.
   All text pairs are WCAG AA (4.5:1 or better) on the stated ground. */
:root {
  --font-display: Georgia, "Times New Roman", serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Type scale (fluid) */
  --step--1: clamp(.85rem, .83rem + .1vw, .92rem);
  --step-0: clamp(1.05rem, 1rem + .25vw, 1.15rem);
  --step-1: clamp(1.3rem, 1.2rem + .5vw, 1.55rem);
  --step-2: clamp(1.7rem, 1.4rem + 1.4vw, 2.3rem);
  --step-3: clamp(2.2rem, 1.7rem + 2.5vw, 3.5rem);

  /* Ground and text */
  --color-bg: #f8f6f1;          /* paper */
  --color-text: #1d2528;        /* ink, 14.5:1 on bg */
  --color-muted: #4f5b60;       /* secondary text, 6.5:1 on bg */
  --color-rule: #d6d3ca;        /* hairlines, decorative only */

  /* Rhine */
  --color-rhine: #0f5c6e;       /* 7:1 on bg; headings, key links */
  --color-rhine-deep: #0a3a47;  /* dark ground for light text, 11:1 with --color-on-deep */
  --color-rhine-tint: #e3eff1;  /* pale panel, text stays --color-text */
  --color-on-deep: #f8f6f1;

  /* Accent: Münster sandstone red */
  --color-accent: #9a1b1f;      /* 7:1 on bg */

  --space-1: .5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 4rem;
  --radius-s: 2px;
  --radius-m: 6px;
  --measure: 65ch;
}