/* Existing styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f4f4f4;
    position: relative;
    min-height: 100vh;
    padding-bottom: 1em; /* Adjust based on footer height */
  }
  
  header {
    background: #333;
    color: #fff;
    padding: 1em 0;
  }
  
  nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
  }
  
  nav ul li {
    display: inline;
    margin: 0 15px;
  }
  
  nav ul li a {
    color: #fff;
    text-decoration: none;
  }
  
  main {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
  }
  
  h1 {
    text-align: center;
  }
  
  img {
    display: block;
    margin: 0 auto;
  }
  
  ul {
    list-style: none;
    padding: 0;
  }
  
  ul li {
    margin: 10px 0;
  }
  
  ul li a {
    text-decoration: none;
    color: #333;
  }
  
  ul li a img {
    width: 50px;
    height: 50px;
    margin-right: 10px;
    vertical-align: middle;
  }
  
  ul li a:hover {
    text-decoration: underline;
  }
  
  footer {
    text-align: center;
    padding: 10px 0 10px 0;
    background: #333;
    color: #fff;
    position: flex;
    bottom: 0;
    width: 100%;
  }
  
  @media (min-width: 768px) {
    main {
      display: flex;
      flex-direction: column;
      align-items: center;
    }
  }