@media (max-width:550px){
    .hidden-xs{
        display:none!important;
    }
    .dataTables_length
    {
        display:none!important;
    }
    #content {        
        padding-top: 40px!important;
    }
}

@media (min-width:550px) and (max-width:768px){
    .hidden-sm{
        display:none!important;
    }
     .dataTables_length
    {
        display:none!important;
    }
    #content {        
        padding-top: 40px!important;
    }
}

@media (min-width:768px) and (max-width:992px){
    .hidden-md{
        display:none!important;
    }
}

@media (min-width:992px){
    .hidden-lg{
        display:none!important;
    }
}

@media (max-height:768px){
    footer{
        display:none!important;
    }
}