style.css

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
  }
  
  header {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
    position: relative;
  }
  
  h1 {
    margin: 0;
    color: #fff;
  }
  
  h2 {
    color: #333;
  }
  
  .menu-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 30px;
    height: 30px;
    background-color: transparent;
    border: none;
    cursor: pointer;
    display: none;
  }
  
  .menu-toggle:before,
  .menu-toggle:after {
    content: "";
    position: absolute;
    width: 20px;
    height: 2px;
    background-color: #fff;
    top: 50%;
    left: 0;
    right: 0;
    margin-top: -1px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .menu-toggle:before {
    transform: translateY(-6px);
  }
  
  .menu-toggle:after {
    transform: translateY(4px);
  }
  
  nav {
    background-color: #fff;
    padding: 10px;
    text-align: center;
  }
  
  nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
  }
  
  nav ul li {
    display: inline;
    margin: 0 10px;
  }
  
  nav ul li a {
    color: #333;
    text-decoration: none;
  }
  
  nav ul li a:hover {
    color: #777;
  }
  
  section {
    padding: 20px;
    margin: 20px;
    border: 1px solid #ddd;
    background-color: #fff;
    color: #333;
  }
  
  footer {
    background-color: #333;
    color: #fff;
    padding: 10px;
    text-align: center;
  }
  
  @media (max-width: 768px) {
    .menu-toggle {
      display: block;
    }
  
    nav ul {
      display: none;
      position: absolute;
      top: 50px;
      left: 0;
      width: 100%;
      background-color: #fff;
      padding: 10px;
      text-align: center;
    }
  
    nav ul li {
      display: block;
      margin: 10px 0;
    }
  }