@media screen and (max-width: 600px)
{
     h1.lgfont
     {
         font-size: 19px;
     }
     .topic
     {
        visibility: hidden;
        clear: both;    
        display: none;
      }
      .dis
     {
        visibility: hidden;
        clear: both;    
        display: none;
    }
 }
 @media only screen and (max-width : 320px) {
/* Styles */
    h1.lgfont
    {
        font-size: 17px;
    }
    .topic
    {
       visibility: hidden;
       clear: both;    
       display: none;
    }
     .dis
    {
       visibility: hidden;
       clear: both;    
       display: none;
    }
}