>>5819
there's also some dollchan settings that configure it, mainly "reply form display in thread" -> "at bottom"
and the mascots userscript
otherwise it's this

/* Post styling */

.innerPost, .markedPost {

    border-radius: 2px;

    background-color: #2F343ED0;

    padding-right: 12px;

    max-width: 84%;

}

.innerOP {

    border-radius: 2px;

    background-color: #2F343ED0;

    padding-left: 4px;

    padding-right: 4px;