/* December treatment: confined to the article, never the shared navigation. */
body.ba-winter-article { background: #f4f5ee; }
body.ba-winter-article .ba-reading-main {
  --bf-color-surface: #f4f5ee;
  --bf-color-canvas: #e5eae1;
  --bf-color-ink: #17291e;
  --bf-color-ink-secondary: #3b5043;
  --bf-color-line: #c6d2c7;
  --bf-color-brass: #65471e;
  --bf-color-brass-fill: #e9dec4;
  --bf-color-focus: #234d35;
  color: var(--bf-color-ink);
}
body.ba-winter-article[data-bf-theme="dark"] { background: #10241a; }
body.ba-winter-article[data-bf-theme="dark"] .ba-reading-main {
  --bf-color-surface: #10241a;
  --bf-color-canvas: #1b3527;
  --bf-color-ink: #f4f3e7;
  --bf-color-ink-secondary: #d5dfd1;
  --bf-color-line: #496253;
  --bf-color-brass: #e7c985;
  --bf-color-brass-fill: #493e28;
  --bf-color-focus: #f1d99f;
}
body.ba-winter-article .ba-reading-main .ba-habitat-content {
  background: color-mix(in srgb, var(--bf-color-surface) 94%, transparent);
}
body.ba-winter-article .ba-falling-leaves { display: none !important; }
body.ba-winter-article .ba-winter-snow {
  position: fixed; inset: 0; z-index: 3; overflow: hidden;
  pointer-events: none; contain: strict;
}
body.ba-winter-article .ba-winter-flake {
  position: absolute; top: 0; left: 0; border-radius: 50%;
  background: #fff; box-shadow: 0 0 3px rgba(91, 112, 100, .28);
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce), print {
  body.ba-winter-article .ba-winter-snow { display: none; }
}