/* schematron-rust site — dark theme
 *
 * Paired with light.css; see that file's header comment for the
 * attribute-scoped, multi-stylesheet setup this and light.css share — both
 * always linked, each scoped to :root[data-theme="…"], switching instant
 * and attribute-driven rather than a stylesheet swap. Every value below was
 * chosen and WCAG-contrast checked for a dark ground, not derived by
 * inverting light.css: an accent dark enough to read on white (light.css's
 * --rust, #8b3a1f) is close to unreadable as text on a near-black page, so
 * the accent family is brightened here, and the two "text-on-tint"
 * backgrounds (--*-bg) are dark, desaturated washes rather than the pale
 * near-white tints light mode uses.
 *
 * Contrast ratios (WCAG 2.2), computed against this file's own --page-bg
 * (#0c0a09) or --card-bg (#1c1917) as noted:
 *   --text on --page-bg              18.11:1
 *   --text-muted on --page-bg         7.83:1
 *   --text-subtle on --page-bg        5.36:1
 *   --rust on --page-bg               6.40:1   (links, tag/heading text)
 *   --rust on --card-bg               5.67:1
 *   --rust-hover on --page-bg         8.43:1
 *   white on --button-fill            4.65:1   (button-primary text)
 *   white on --button-fill-hover      6.13:1
 *   --ember on --page-bg              7.70:1   (hero gradient-text stop)
 *   --success on --success-bg         8.73:1
 *   --warning on --warning-bg         9.49:1
 *   --danger on --danger-bg           6.21:1
 * All clear WCAG AA (4.5:1 text / 3:1 large text); most clear AAA (7:1).
 */

:root[data-theme="dark"] {
  --rust: #e2743f;
  --rust-hover: #f0916a;
  --rust-tint: #3a2015;
  --ember: #f0863c;
  --xml-blue: #5aa3d8;
  --danger: #f87171;
  --warning: #fbbf24;
  --success: #4ade80;

  /* See light.css's comment: button-primary needs a fill dark/saturated
   * enough for white text at ≥4.5:1, which the brighter text-role --rust
   * above is not. Darkens on hover, matching light mode's convention. */
  --button-fill: #c2521f;
  --button-fill-hover: #a8410f;

  --page-bg: #0c0a09;
  --card-bg: #1c1917;
  --text: #f5f5f4;
  --text-muted: #a8a29e;
  --text-subtle: #8a8480;
  --border: #33302e;
  --border-strong: #44403c;

  --success-bg: #0f2b1a;
  --warning-bg: #2e2005;
  --danger-bg: #33100f;
  --info-bg: #10202c;
  --row-hover-bg: #252220;

  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);

  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --content-max: 72rem;
  --prose-max: 44rem;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}