.topnav {
    overflow: hidden;
    background-color: #005bbb;
    position: relative;
  }
  
  .topnav #myLinks {
    display: none;
  }
  
  .topnav a {
    color: white;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    display: none;
  }
  
  .topnav a.icon {
    display: none;
  }
  
  .active {
    background-color: #005bbb;
    color: white;
  }

@media only screen and (max-width: 600px){
    .topnav {
        overflow: hidden;
        background-color: #005bbb;
        position: relative;
      }
      
      .topnav #myLinks {
        display: none;
      }
      
      .topnav a {
        color: white;
        padding: 14px 16px;
        text-decoration: none;
        font-size: 17px;
        display: block;
      }
      
      .topnav a.icon {
        display: block;
      }
      
      .active {
        background-color: #005bbb;
        color: white;
      }
}