.gallery-item {
    position:absolute;
    width: 150px;
    height: 150px;
    background-size: cover;
    background-position: center;
    display: inline-block;
    margin: 5px;
    border-radius: 10px;
    overflow: hidden;
    will-change: transform;
    background-color: black;
}

.gallery-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
   opacity: 0.75;
}