How to Create a Pure CSS Multi-Level Dropdown Menu?

Pure CSS Multi-Level Drop-Down Menu: A Comprehensive Guide

Multi-level drop-down menus, a vital element in web navigation, can be elegantly crafted using pure CSS. While various approaches exist online, we explore the most modern and efficient method to achieve this functionality.

The CSS Code

The CSS code below creates a three-level drop-down menu with nested unordered lists and subtle hover effects.

.third-level-menu {
  position: absolute;
  top: 0;
  right: -150px;
  width: 150px;
  list-style: none;
  padding: 0;
  margin: 0;
  display: none;
}

.third-level-menu > li {
  height: 30px;
  background: #999999;
}
.third-level-menu > li:hover {
  background: #CCCCCC;
}

.second-level-menu {
  position: absolute;
  top: 30px;
  left: 0;
  width: 150px;
  list-style: none;
  padding: 0;
  margin: 0;
  display: none;
}

.second-level-menu > li {
  position: relative;
  height: 30px;
  background: #999999;
}
.second-level-menu > li:hover {
  background: #CCCCCC;
}

.top-level-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.top-level-menu > li {
  position: relative;
  float: left;
  height: 30px;
  width: 150px;
  background: #999999;
}
.top-level-menu > li:hover {
  background: #CCCCCC;
}

.top-level-menu li:hover > ul {
  /* Display the next level's menu on hover */
  display: inline;
}

/* Menu Link Styles */

.top-level-menu a /* Apply to all links inside the multi-level menu */ {
  font: bold 14px Arial, Helvetica, sans-serif;
  color: #FFFFFF;
  text-decoration: none;
  padding: 0 0 0 10px;

  /* Make the link cover the entire list item-container */
  display: block;
  line-height: 30px;
}
.top-level-menu a:hover {
  color: #000000;
}

The HTML Structure

The HTML code below defines a three-level multi-level drop-down menu with links to various pages.

<ul class="top-level-menu">
    <li><a href="#">About</a></li>
    <li><a href="#">Services</a></li>
    <li>
        <a href="#">Offices</a>
        <ul class="second-level-menu">
            <li><a href="#">Chicago</a></li>
            <li><a href="#">Los Angeles</a></li>
            <li>
                <a href="#">New York</a>
                <ul class="third-level-menu">
                    <li><a href="#">Information</a></li>
                    <li><a href="#">Book a Meeting</a></li>
                    <li><a href="#">Testimonials</a></li>
                    <li><a href="#">Jobs</a></li>
                </ul>
            </li>
            <li><a href="#">Seattle</a></li>
        </ul>
    </li>
    <li><a href="#">Contact</a></li>
</ul>

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