@media (min-width: 768px) {
    body, html {
        margin: 0;
        overflow: hidden;
        height: 100%;
    }
    #left {
        position: absolute;
        top: 50px;
        bottom: 0;
        left: 0;
        width: 50%;
        overflow-y: scroll;
        height: calc(100% - 50px);
        padding: 0.5em;
    }

    #right {
        position: absolute;
        top: 50px;
        bottom: 0;
        right: 0;
        width: 50%;
        overflow-y: scroll;
        height: calc(100% - 50px);
        padding: 0.5em;
    }
}