.row {
    display: -ms-flexbox; /* IE10 */
    display: flex;
    -ms-flex-wrap: wrap; /* IE10 */
    flex-wrap: wrap;
    padding: 0 4px;
  }
  
  /* Create four equal columns that sits next to each other */
  .column {
    -ms-flex: 33%; /* IE10 */
    flex: 33%;
    max-width: 33%;
    padding: 0 4px;
  }
  
  .column img {
    margin-top: 8px;
    vertical-align: middle;
    width: 100%;
  }
  
  /* Responsive layout - makes a two column-layout instead of four columns */
  @media screen and (max-width: 800px) {
    .column {
      -ms-flex: 50%;
      flex: 50%;
      max-width: 50%;
    }
  }
  
  /* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
  @media screen and (max-width: 600px) {
    .column {
      -ms-flex: 100%;
      flex: 100%;
      max-width: 100%;
    }
  }



  .btn {
    border: 2px solid black;
    background-color: white;
    color: black;
    padding: 14px 28px;
    font-size: 16px;
    cursor: pointer;
  }
  
  /* Green */
  .success {
    border-color: #04AA6D;
    color: green;
  }
  
  .success:hover {
    background-color: #04AA6D;
    color: white;
  }
  
  /* Blue */
  .info {
    border-color: #2196F3;
    color: dodgerblue;
  }
  
  .info:hover {
    background: #2196F3;
    color: white;
  }
  
  /* Orange */
  .warning {
    border-color: #ff9800;
    color: orange;
  }
  
  .warning:hover {
    background: #ff9800;
    color: white;
  }
  
  /* Red */
  .danger {
    border-color: #f44336;
    color: red;
  }
  
  .danger:hover {
    background: #f44336;
    color: white;
  }
  
  /* Gray */
  .default {
    border-color: #e7e7e7;
    color: black;
  }
  
  .default:hover {
    background: #e7e7e7;
  }