/* Preserve the glass-card faces; fade only the outer edges of the artwork. */
#guides .guides-art {
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, transparent 6%, #000 14%, #000 89%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0%, transparent 6%, #000 14%, #000 89%, transparent 100%);
  -webkit-mask-size: 100% 100%;
  mask-size: 100% 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}