#playground-in,#playground-out,#playground-message{box-sizing:border-box;width:100%;margin:0;font-size:inherit;border:8px solid #888}#playground-in{border-bottom:1px dashed #888;--padding:20px}#playground-out,#playground-message{border-top:1px dashed #888}#playground-in,#playground-out{height:min(400px,calc(50vh - 65px));resize:vertical}#playground-out{background-color:#fff}#playground-message{position:static;padding:20px;background:0 0;color:inherit}#playground-message input[type=submit]{font-size:200%}