body { background: #121212; color: white; font-family: Arial; }
.form-container { text-align: center; margin-top: 100px; }
input { margin: 5px; padding: 8px; width: 200px; }
button { margin: 5px; padding: 8px; width: 220px; background: #00ff99; border: none; color: #000; cursor: pointer; }
#user-list img { width: 60px; height: 60px; margin: 5px; cursor: pointer; border-radius: 50%; border: 2px solid #00ff99; }
#chat-room, #private-chat-room { margin: 20px; }