body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin-top: 100px;
  }
  #counter {
    font-size: 48px;
    margin-bottom: 20px;
  }
  button {
    padding: 10px 20px;
    margin: 5px;
    font-size: 18px;
    cursor: pointer;
  }