.gallery-thumb{
  width: 100%;
  aspect-ratio: 1;
  opacity: .75;
  transition: all 0.5s;
  border-radius: 3px;
}
.gallery-thumb:hover{
  opacity: 1;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, .2);
  -webkit-transform: scale(1.05);
     -moz-transform: scale(1.05);
      -ms-transform: scale(1.05);
       -o-transform: scale(1.05);
          transform: scale(1.05);
}

/*
@media only screen and (min-width: 575px) {
  .gallery-thumb{
    height: 150px;
  }
}

@media only screen and (max-width: 575px) {
  .gallery-thumb{
    height: 100px;
  }
} */