body {
    background-color: #f1f1f1;
   
  }
  
  /* Center website */
  .main {
    max-width: 1000px;
    margin: auto;
  }
  
  h1 {
    font-size: 50px;
    word-break: break-all;
  }
  
  .row {
    margin: 10px -16px;
  }
  
  /* Add padding BETWEEN each column */
  .row,
  .row > .column {
    padding: 8px;
  }
  
  /* Create three equal columns that floats next to each other */
  .column {
    float: left;
    width: 50%;
    display: none; /* Hide all elements by default */
  }
  
  /* Clear floats after rows */ 
  .row:after {
    content: "";
    display: table;
    clear: both;
  }
  
  /* Content */
  .contentGallery {
    background-color: white;
    padding: 10px;
    overflow: hidden;
    
  }

  .contentGallery iframe {
      width: 100%;
  }
  
  /* The "show" class is added to the filtered elements */
  .show {
    display: block;
  }
  
  /* Style the buttons */
  .btn {
    border: none;
    outline: none;
    padding: 12px 16px;
    background-color: rgb(173, 173, 173);
    cursor: pointer;
  }
  
  .btn:hover {
    background-color: #ddd;
  }
  
  .btn.active {
    background-color: #666;
    color: white;
  }

  @media (max-width: 1000px) {
    /* Create three equal columns that floats next to each other */
    .column {
      float: left;
      width: 100%;
    }
    
    
  }

  @media (max-width: 600px) {
    #myBtnContainer button{
      width: 100%;
      margin-top: 10px;
    }
  }