.spt-wrapper {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}

@media (max-width: 750px) {
    .spt-wrapper {
        flex-wrap: wrap;
    }
    .spt-wrapper aside {
        width: 100%;
    }
}