.split-layout-modal {
    display: flex;
    flex-direction: column;
}

.split-layout-modal > div {
    width: 100%;
    padding: 1rem;
}

.split-layout-modal > div:first-of-type {
    border-bottom: 1px solid black;
    border-right: 0;
}

@media screen and (min-width: 48rem) {
    .split-layout-modal {
        flex-direction: row;
    }

    .split-layout-modal > div {
        width: 50%;
    }

    .split-layout-modal > div:first-of-type {
        border-right: 1px solid black;
        border-bottom: 0;
    }
}