@media (max-width: 768px) {
    .right-column {
        margin-left: 0px;
    }
}
@media (min-width: 768px) {
    .right-column {
        margin-left: 20px;
    }
}
.left-column {
    padding:0px;
}
.right-column {
    padding:0px;
}