.zoom {
    position: relative;
    border: 1px solid none;
    overflow: hidden;
  }
  .zoom img {
    max-width: 100%;
    -moz-transition: all 0.5s;
    -webkit-transition: all 0.5s;
    transition: all 0.5s;
  }
  .zoom:hover img {
    -moz-transform: scale(1.2);
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }