JSFiddle - React, Tailwind, and code Playground

by Sambora

HTML

<!--
We will create a family tree using just CSS(3)
The markup will be simple nested lists
-->
<div class="tree">
	<ul>
		<li>
			<a href="#">Parent</a>
			<ul>
				<li>
					<a href="#">Child</a>
					<ul>
						<li>
							<a href="#">Grand Child</a>
						</li>
					</ul>
				</li>
				<li>
					<a href="#">Child</a>
					<ul>
						<li><a href="#">Grand Child</a></li>
						<li>
							<a href="#">Grand Child</a>
							<ul>
								<li>
									<a href="#">Great Grand Child</a>
								</li>
								<li>
									<a href="#">Great Grand Child</a>
								</li>
								<li>
									<a href="#">Great Grand Child</a>
								</li>
							</ul>
						</li>
						<li><a href="#">Grand Child</a></li>
					</ul>
				</li>
			</ul>
		</li>
	</ul>
</div>

CSS

.tree li {
    margin: 0px 0;
	
	list-style-type: none;
    position: relative;
	padding: 20px 5px 0px 5px;
}

.tree li::before{
    content: '';
	position: absolute; 
    top: 0;
	width: 1px; 
    height: 100%;
	right: auto; 
    left: -20px;
	border-left: 1px solid #ccc;
    bottom: 50px;
}
.tree li::after{
    content: '';
	position: absolute; 
    top: 30px; 
	width: 25px; 
    height: 20px;
	right: auto; 
    left: -20px;
	border-top: 1px solid #ccc;
}
.tree li a{
    display: inline-block;
	border: 1px solid #ccc;
	padding: 5px 10px;
	text-decoration: none;
	color: #666;
	font-family: arial, verdana, tahoma;
	font-size: 11px;
    border-radius: 5px;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
}

/*Remove connectors before root*/
.tree > ul > li::before, .tree > ul > li::after{
	border: 0;
}
/*Remove connectors after last child*/
.tree li:last-child::before{ 
      height: 30px;
}

/*Time for some hover effects*/
/*We will apply the hover effect the the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
	background: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after, 
.tree li a:hover+ul li::before, 
.tree li a:hover+ul::before, 
.tree li a:hover+ul ul::before{
	border-color:  #94a0b4;
}