body {
    font-family: Arial, sans-serif;
    margin: 40px;
    line-height: 1.6;
  }
  
  header {
    text-align: center;
    margin-bottom: 50px;
  }
  
  h1 {
    font-size: 36px;
  }
  
  h2 {
    margin-top: 40px;
  }