.container{max-width:600px;margin:0 auto;padding:20px}textarea{width:100%;height:100px;resize:vertical}button{margin-top:10px}.popup{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.5);display:flex;justify-content:center;align-items:center}.popup-content{background-color:#fff;padding:20px;border-radius:5px}.popup-content pre{white-space:pre-wrap}