.modal {
    display: none; 
    position: fixed; 
    z-index: 1; 
    padding-top: 100px; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: hidden; 
    background-color: rgb(0,0,0); 
    background-color: rgba(0,0,0,0.9); 
  }
  
 
  .modal-content {
    margin: auto;
    display: block;
    max-width: calc(70vw);
    width: auto;
    height: auto;
    max-height: 80%;
  }

  

  #caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
  }
  
  .modal-content, #caption {  
    -webkit-animation-name: zoom;
    -webkit-animation-duration: 0.6s;
    animation-name: zoom;
    animation-duration: 0.6s;
  }

  @-webkit-keyframes zoom {
    from {-webkit-transform:scale(0)} 
    to {-webkit-transform:scale(1)}
  }
  
  @keyframes zoom {
    from {transform:scale(0)} 
    to {transform:scale(1)}
  }
  
  .close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
  }
  
  .close:hover,
  .close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
  }
  
  @media only screen and (max-width: 700px){
    .modal-content {
      width: 80%;
      height: auto;
    }
  }