.row.toggled {
    background: #f1ffef;
    padding: 0 20px;
    margin: 0 auto;
    min-height: 0;
    max-height: 0;
    overflow: hidden;
    transition: min-height .5s, padding .5s;
}

@media only screen and (max-width: 40em) {
    .row.toggled {
        background: transparent;
        padding: 0 20px;
        min-height: inherit;
        max-height: inherit;
    }
}