.main > footer {
    height: 3rem;
    max-height: 3rem;
}

.main > .content {
    height: calc(100vh - 6.5rem);
    max-height: calc(100vh - 6.5rem);
    overflow-y: auto;
}




@media (min-width: 641px) {
 .sidebar
{
    max-height: 100vh;
    overflow-y: auto;
   
}