body{font-family:sans-serif;margin:0;padding:0;background:#f0f2f5}
#auth-section, .waiting, #chat-app{max-width:400px;margin:50px auto;padding:20px;background:white;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,0.1)}
input{display:block;width:100%;margin:10px 0;padding:10px;border:1px solid #ccc;border-radius:5px}
button{padding:10px 20px;background:#0b5cff;color:white;border:none;border-radius:5px;margin:5px;cursor:pointer}
button:hover{background:#084ecb}
#messages{max-height:300px;overflow-y:auto;border:1px solid #ccc;padding:10px;margin:10px 0;border-radius:5px}