@media (max-width: 600px) {
    body, #newBody {
        width: 100%;
    }
}
@media (min-width: 601px) and (max-width: 768px) {
    body, #newBody {
        width: 100%;
    }
}
@media (min-width: 769px) {
    body, #newBody {
        width: 100%;
    }
}