body {
    font-family: sans-serif;
    background: #f5f5f5;
    padding: 20px;
  }
  #chat-container {
    background: white;
    padding: 20px;
    max-width: 600px;
    margin: auto;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
  }
  #chat-log {
    margin-bottom: 10px;
    height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
  }
  #user-input {
    width: 80%;
    padding: 8px;
  }
  button {
    padding: 8px 16px;
  }