.img {
  border-radius: 20px;
  display: inline-block;
  position: relative;
  overflow: hidden;
}

.img:before {
  text-align: center;
  content: "";
  z-index: 1;
  border-radius: 20px;
  position: absolute;
  top: 20px;
  bottom: 2px;
  left: 2px;
  right: 2px;
  box-shadow: 0 48px 100px #110c2e26;
}