index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="style.css" />
    <title>JavaScript - CSS Responsive Dropdown Menu</title>
    <link rel="preconnect" href="https://fonts.googleapis.com" />
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
    <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap" rel="stylesheet" />
  </head>
  <body>
    <div class="container pt-4">
      <!-- Ozmenu -->
      <div class="menu-open"><span class="open"></span></div>
      <div class="ozmenu mt-4">
        <div class="menu-close"><span class="close"></span></div>
        <ul class="ozmenu-nav">
          <li class="item"><a href="#">Home</a></li>
          <li class="item"><a href="#">About Us</a></li>
          <li class="item dropdownitem">
            <a href="#" class="nav-dropdown">Services</a>
            <div class="dropdown">
              <ul>
                <li class="item"><a href="#">Software</a></li>
                <li class="item"><a href="#">Server Maintenance</a></li>
                <li class="item dropdownitem">
                  <a href="#" class="nav-dropdown">Web Hosting</a>
                  <div class="dropdown">
                    <ul>
                      <li class="item"><a href="#">Linux Hosting</a></li>
                      <li class="item"><a href="#">Windows Hosting</a></li>
                    </ul>
                  </div>
                </li>
                <li class="item"><a href="#">Graphic Design</a></li>
              </ul>
            </div>
          </li>
          <li class="item dropdownitem">
            <a href="#" class="nav-dropdown">Web Design</a>
            <div class="dropdown">
              <ul>
                <li class="item"><a href="#">Corporate Web Design</a></li>
                <li class="item dropdownitem">
                  <a href="#" class="nav-dropdown">E-Commerce</a>
                  <div class="dropdown">
                    <ul>
                      <li class="item"><a href="#">Ready E-Commerce</a></li>
                      <li class="item"><a href="#">Custom E-Commerce</a></li>
                    </ul>
                  </div>
                </li>
                <li class="item dropdownitem">
                  <a href="#" class="nav-dropdown">Personal Web Design</a>
                  <div class="dropdown">
                    <ul>
                      <li class="item"><a href="#">Blog Site</a></li>
                      <li class="item"><a href="#">Portfolio Site</a></li>
                      <li class="item"><a href="#">Custom Personal Site</a></li>
                    </ul>
                  </div>
                </li>
                <li class="item"><a href="#">Custom Web Design</a></li>
                <li class="item"><a href="#">Onepage Web Design</a></li>
              </ul>
            </div>
          </li>
          <li class="item dropdownitem">
            <a href="#" class="nav-dropdown">Help</a>
            <div class="dropdown">
              <ul>
                <li class="item"><a href="#">Mail Settings</a></li>
                <li class="item"><a href="#">Hosting Selection</a></li>
                <li class="item"><a href="#">Admin Panel</a></li>
              </ul>
            </div>
          </li>
          <li class="item"><a href="#">Contact</a></li>
        </ul>
      </div>
      <!-- /Ozmenu -->
    </div>
    <script src="ozmenu.js"></script>
  </body>
</html>