.welcome{max-width:400px;margin-top:100px}.welcome h2{font-size:3em}.welcome button{margin:30px auto}.chat h2{font-size:2.6em;margin-bottom:40px}.chat span{font-size:1.4em}.chat .time{margin-bottom:2px;font-size:.8em;display:block}.messages{max-height:300px;overflow:auto}.messages::-webkit-scrollbar{width:10px}.messages::-webkit-scrollbar-track{background:#f1f1f1}.messages::-webkit-scrollbar-thumb{background:#888}.messages::-webkit-scrollbar-thumb:hover{background:#555}
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