/*
 * にごりしろ — design tokens
 * Palette values are fixed by _research/LOCK.md §5. Do not add new colours here.
 */

:root {
  /* light mode (default) */
  --color-ground: #a4b0b8; /* page background — 濁った水 */
  --color-plate: #f2f4f5;  /* plate under diagrams — 透明な氷 */
  --color-ink: #101619;    /* body text */
  --color-faint: #373e4b;  /* secondary text */
  --color-link: #6c2916;   /* links */
  --color-nigori: #814e22; /* band / cut-line marks — graphics only */
  --color-edge: #4b5861;   /* rules / borders */

  --font-serif: "游明朝", "Yu Mincho", "Hiragino Mincho ProN", "HiraMinProN-W3", serif;
  --font-sans: "游ゴシック体", "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;

  --measure: 40rem;
  --measure-wide: 56rem;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 3rem;
  --space-5: 5rem;
  --space-6: 7.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-ground: #39464e;
    --color-plate: #1b2226;
    --color-ink: #e8ecee;
    --color-faint: #a9babd;
    --color-link: #e8aa6a;
    --color-nigori: #d98a41;
    --color-edge: #8a9aa3;
  }
}