/* responsive.css */
@media (max-width: 600px) {
  #chat-container {
    max-height: 90vh;
    border-radius: 8px;
    padding: 1rem;
  }

  #chat-header {
    font-size: 18px;
  }

  #chat-input input,
  #chat-input button {
    font-size: 14px;
    padding: 12px;
  }
}