.favorite-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 28px;
  padding: 0;
  margin: 0;
  color: gray;
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  z-index: 100;
}

.favorite-btn.active i {
  color: hotpink;
}