.tdiv
{
margin-left:100px; margin-right:100px;
}
     Remove the navbar's default margin-bottom and rounded borders 
    .navbar {
      margin-bottom 0;
      border-radius 0;
    }
    
     Set height of the grid so .sidenav can be 100% (adjust as needed) 
    .row.content {height 450px}
    
     Set gray background color and 100% height 
    .sidenav {
      padding-top 20px;
      background-color #f1f1f1;
      height 100%;
    }
    
     Set black background color, white text and some padding 
    footer {
      background-color #555;
      color white;
      padding 15px;
    }
    
     On small screens, set height to 'auto' for sidenav and grid 
    @media screen and (max-width 767px) {
      .sidenav {
        height auto;
        padding 15px;
      }
      .row.content {heightauto;}
	  .tdiv
{
margin-left:100px; margin-right:100px;
}
    }