body, html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
  }
  
  nav {
    position: sticky;
    top: 0;
    background-color: #333;
    padding: 10px;
    z-index: 1000;
  }
  
  nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
  }
  
  nav a {
    text-decoration: none;
    color: white;
    font-weight: bold;
  }
  
  .image-container {
    position: static;
    width: 100%;
  }
  
  .image-container img {
    width: 100%;
    height: auto;
    display: block;
  }
  
  .overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 2rem;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px 20px;
    border-radius: 8px;
  }
  
  footer {
    position: relative;
    background-color: #222;
    color: white;
    padding: 20px;
    text-align: left;
  }
  
  .back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #444;
    color: white;
    padding: 10px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
  }
  .back-to-top:hover {
    background: #666;
  }