.ph-20 {
    padding-right: 20px;
    padding-left: 20px;
}

.h-50 {
    height: 50px;
}

@media screen and (min-width: 45em) {
    .db-ml {
        display: block;
    }

    .dn-ml {
        display: none;
    }
}

@media screen and (min-width: 1200px) {
    .db-xl {
        display: block;
    }

    .dn-xl {
        display: none;
    }
}