.shimmer {
  position: relative;
  overflow: hidden;
}
.shimmer::before {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.55s ease;
}
.shimmer:hover::before {
  left: 150%;
}