body {
    background-color: #f8f9fa;
    font-family: Arial, sans-serif;
  }
  .container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }
  .center {
    text-align: center;
  }
  #gameArea {
    display: none;
  }