div.gallery {
    border: 1px solid #ccc;
  }
  
  div.gallery:hover {
    border: 1px solid #777;
  }
  
  div.gallery img {
    width: 100%;
    height: auto;
  }
  
  div.desc {
    padding: 15px;
    text-align: center;
  }
  
  * {
    box-sizing: border-box;
  }
  
  .Gheader {
    text-align: center;
    padding: 32px;
  }
  
  .row {
    display: -ms-flexbox; /* IE 10 */
    display: flex;
    -ms-flex-wrap: wrap; /* IE 10 */
    flex-wrap: wrap;
    padding: 0 4px;
  }
  
  /* Create two equal columns that sits next to each other */
  .column {
    -ms-flex: 50%; /* IE 10 */
    flex: 50%;
    padding: 0 4px;
  }
  
  .column img {
    margin-top: 8px;
    vertical-align: middle;
  }
  
  /* Style the buttons */
  .btn {
    border: none;
    outline: none;
    padding: 10px 16px;
    background-color: #f1f1f1;
    cursor: pointer;
    font-size: 18px;
  }
  
  .btn:hover {
    background-color: #ddd;
  }
  
  .btn.active {
    background-color: #666;
    color: white;
  }

  .row > .column {
    padding: 0 8px;
  }
  
  .row:after {
    content: "";
    display: table;
    clear: both;
  }
  
  /* Create four equal columns that floats next to eachother */
  .column {
    float: left;
    width: 25%;
  }
  
  img.gall {
    opacity: 0.6;
  }
  
  .gall{
    width: 25%;
    height: 25%;
  }

  .active,
  .gall:hover {
    opacity: 1;
  }
  
  img.hover-shadow {
    transition: 0.3s;
  }
  
  .hover-shadow:hover {
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
  }