/* Sprint 14 Phase F — `doom` theme.
 *
 * 90s-throwback reference to id Software's DOOM (1993). Hellfire
 * palette: sulfur-yellow on hellfire-red on cracked-stone brown.
 * Card back: inverted pentagram inside a circle on a hellfire
 * radial gradient — the classic "you have entered the marble
 * sanctum" demonic vibe. */

body[data-theme="doom"] {
  --bg:          #1a0805;
  --paper:       #2a1208;
  --ink:         #f5e0a8;
  --ink-soft:    #c8a560;
  --felt-mid:    #6a1a0a;
  --card-bg:     #f0e2c8;
  --card-border: #6b5238;
  --red:         #c8201c;
  --spade:       #2a1208;
  --accent:      #f5c518;
  --team-ns:     #c8201c;
  --team-ew:     #f5c518;
  --amber:       #ffaa00;

  --card-back-image: url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 144'%3E%3Cdefs%3E%3CradialGradient id='hell' cx='50%25' cy='60%25' r='65%25'%3E%3Cstop offset='0%25' stop-color='%23ff4a18'/%3E%3Cstop offset='55%25' stop-color='%238a1a08'/%3E%3Cstop offset='100%25' stop-color='%231a0805'/%3E%3C/radialGradient%3E%3C/defs%3E%3Crect width='100' height='144' fill='url(%23hell)'/%3E%3Ccircle cx='50' cy='72' r='30' fill='none' stroke='%23f5c518' stroke-width='1.6'/%3E%3Cpolygon points='50,46 65,90 27,62 73,62 35,90' fill='none' stroke='%23f5c518' stroke-width='1.6' stroke-linejoin='miter'/%3E%3Ccircle cx='50' cy='75' r='4' fill='%23f5c518'/%3E%3Ccircle cx='50' cy='75' r='1.5' fill='%231a0805'/%3E%3Crect x='3' y='3' width='94' height='138' rx='4' fill='none' stroke='%23f5c518' stroke-width='2'/%3E%3C/svg%3E");
  --card-back-size: 100% 100%;
  --card-back-repeat: no-repeat;
  --card-back-position: center;
  --card-back-mask: none;
  --card-emblem-display: none;
}