body {
    font-family: Arial, sans-serif;
    margin: 20px;
  }
  h1, h2, h3 {
    color: #333;
  }
  ul {
    list-style-type: none;
    padding: 0;
  }
  li {
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 10px;
  }
  a {
    color: #007bff;
    text-decoration: none;
  }
  a:hover {
    text-decoration: underline;
  }
  form {
    margin-bottom: 20px;
  }
  input, textarea, button {
    margin: 5px 0;
  }
  video {
    border: 1px solid #ddd;
    margin: 10px;
  }