body {
    font-family: sans-serif;
    font-size: 16px;
  }
  
  h1 {
    font-size: 24px;
  }
  
  p {
    margin-bottom: 10px;
  }
  
  a {
    color: #000000;
    text-decoration: none;
  }
  
  a:hover {
    color: #0000ff;
  }
  
  .light-theme {
    background-color: #ffffff;
    color: #000000;
  }
  
  .dark-theme {
    background-color: #000000;
    color: #ffffff;
  }