a[href='#random-story']:hover {
  background: linear-gradient(90deg, #8B0000, #a00, #8B0000) !important;
  background-size: 200% !important;
  animation: bloodFlow 2s infinite !important;
}
@keyframes bloodFlow {
  0% { background-position: 0%; }
  100% { background-position: 200%; }
}