.Page_TwoColumns {
    display: flex;
    gap: 16px;
}

@media (max-width: 700px) {
    .Page_TwoColumns {
        flex-direction: column;
    }
}
@media (not (max-width: 700px)) {
    .Page_TwoColumns-left,
    .Page_TwoColumns-right {
        flex-grow: 1;
        flex-basis: 0;
    }
}