body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
  }
  
  header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 10px 0;
  }
  
  h1 {
    margin: 0;
  }
  
  section {
    margin: 20px;
    padding: 15px;
    background-color: white;
    border-radius: 5px;
  }
  
  button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #45a049;
  }