body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
  }
  
  .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin: 20px;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  h1 {
    font-size: 24px;
  }
  
  h2 {
    font-size: 20px;
  }
  
  button {
    margin: 10px;
    padding: 10px 20px;
    font-size: 18px;
  }
  
  ul {
    list-style: none;
    padding: 0;
  }
  
  li {
    font-size: 16px;
    margin: 5px 0;
  }