:root{
  --cof-blk: #1C1E21;   /* Turnout Black: Logo letters, text, dark backgrounds */
  --cof-chalk: #F3EFE6;   /* Station Chalk: Light backgrounds, paper */
  --cof-red: #B3191F;   /* Engine Red: Shared FF arms on light; key accent */
  --cof-brass: #C9973A;   /* Brass Bell: Shared FF arms on dark; rules and details */
  --cof-steel: #6D7680;   /* Tool Steel: Secondary text, captions, UI */
  --cof-ember: #E8671E;   /* Forge Ember: Rare highlight only (never in the logo) */
}