.page{
    border: 0px solid #f8f9fa;
}
.w-40 {
    width: 40%!important;
}

@media only screen and (max-width: 750px) {
    .w-40 {
        width: 90%!important;
    }

    .w-50 {
        width: 100%!important;
    }

    .w-75 {
        width: 100%!important;
    }
}