body{margin:0;background:#111;color:#eee;font-family:sans-serif}#top,#bar{display:flex;padding:10px;background:#222}#chat{height:75vh;overflow:auto;padding:10px}.u,.a{padding:8px;margin:8px;border-radius:8px}.u{background:#2563eb}.a{background:#333}input,select,button{margin:4px;padding:8px}dialog{background:#222;color:#fff}