.collection-card {
  position: relative;
}
.collection-card:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(to bottom, rgba(31, 50, 52, 0.1), rgba(31, 50, 52, 0.4));
}
.collection-card:hover:before {
  background-image: linear-gradient(to bottom, rgba(31, 50, 52, 0.1), rgba(31, 50, 52, 0.5));
}

.card-gradient {
  background-image: linear-gradient(to bottom, rgba(31, 50, 52, 0.3), rgba(31, 50, 52, 0.8));
}