@media only screen and (max-width:759px){
  .charts
      {
        
        grid-template-columns:1fr;
        /* display: inline-block; */
      
      }
      #piechart_3d{
        margin-left: -60px;
      }
      #top_x_div{
       margin-top: 280px;
       margin-left: -460px;
       margin-bottom: 200px;
      }
}