@media (min-width: 0px) {
    .pull-right-xs {
        float: right;
    }
}
@media (min-width: 768px) {
    .pull-right-sm {
        float: right;
    }
}
@media (min-width: 992px) {
    .pull-right-md {
        float: right;
    }
}
@media (min-width: 1200px) {
    .pull-right-lg {
        float: right;
    }
}