.response:has(.card:first-of-type[style="display: none"]) .card:last-of-type {
    flex-direction: column-reverse;
}

Just a small note if you're wondering what this is: responses that have no question/are posts will have style="display: none" on the FIRST card in them. Once we know it has that, we just need to delete the second card and then reverse its direction.