JSFiddle - React, Tailwind, and code Playground

HTML

<div id="cssninja">
		<p><a href="http://www.thecssninja.com/xhtml/futurebox">Example from the [CSS] Ninja</a></p>
	</div>
	
	<ul>
		<li><a href="#futurebox_img1"><img src="gr_ninja-attack_med.gif" width="100" height="102" alt="The CSS Ninja" id="futurebox01" /></a></li>
		<li><a href="#futurebox_img2"><img src="gr_ninja-attack_med.gif" width="100" height="102" alt="The CSS Ninja" id="futurebox01" /></a></li>
		<li><a href="#futurebox_img3"><img src="gr_ninja-attack_med.gif" width="100" height="102" alt="The CSS Ninja" id="futurebox01" /></a></li>
		<li><a href="#futurebox_img4"><img src="gr_ninja-attack_med.gif" width="100" height="102" alt="The CSS Ninja" id="futurebox01" /></a></li>
		<li><a href="#futurebox_img5"><img src="gr_ninja-attack_med.gif" width="100" height="102" alt="The CSS Ninja" id="futurebox01" /></a></li>
	</ul>
	
	<div class="overlay" id="futurebox_img1">
		<a href="#close" title="Close future box"><img src="gr_cssninja_lrg.png" alt="The Css Ninja" width="469" height="500" /></a>
	</div>
	
	<div class="overlay" id="futurebox_img2">
		<a href="#close" title="Close future box"><img src="gr_cssninja_lrg2.png" alt="The Css Ninja" width="469" height="500" /></a>
	</div>
	
	<div class="overlay" id="futurebox_img3">
		<a href="#close" title="Close future box"><img src="gr_cssninja_lrg3.png" alt="The Css Ninja" width="469" height="500" /></a>
	</div>
	
	<div class="overlay" id="futurebox_img4">
		<a href="#close" title="Close future box"><img src="gr_cssninja_lrg4.png" alt="The Css Ninja" width="469" height="500" /></a>
	</div>
	
	<div class="overlay" id="futurebox_img5">
		<a href="#close" title="Close future box"><img src="gr_cssninja_lrg5.png" alt="The Css Ninja" width="469" height="500" /></a>
	</div>

CSS

/* Just some base styles not needed for example to function */
*, html { font-family: Verdana, Arial, Helvetica, sans-serif; }
html, body { height: 100%; }

body, form, ul, li, p, h1, h2, h3, h4, h5
{
	margin: 0;
	padding: 0;
}
body { background-color: #606061; color: #ffffff; }
img { border: none; }
p
{
	font-size: 1em;
	margin: 0 0 1em 0;
}

/* Branding */
#cssninja
{
	position: absolute;
	top: 0;
	left: 0;
	background-color: #18191d;
	width: 100%;
	height: 40px;
}
	#cssninja p
	{
		color: #ffffff;
		text-align: center;
		margin: 10px 0 0 0;
	}
	#cssninja a
	{
		color: #ffffff;
		text-decoration: none;
		background: url(../assets/ico_ninja.gif) 0 0 no-repeat;
		padding: 4px 0 9px 28px;
	}
	#cssninja a:hover
	{
		text-decoration: underline;
	}
	
/* Futurebox styles */
ul
{
	padding: 60px 0 0 60px;
}
	ul li
	{
		display: inline-block;
		float: left;
		list-style: none;
		margin: 0 10px 0 0;
		border: 3px solid #ccc;
		-webkit-border-radius: 3px;
		-moz-border-radius: 3px;
	}
		ul li a, ul li img { display: block; }
	ul li:hover { border: 3px solid #1E528C; }

.overlay
{
	width: 100%;
	height: 100%;
	position: absolute; 
	top: 0; 
	left: 0; 
	display: none; 
	z-index: 999;
	background: rgba(0,0,0,0.7);
}
	.overlay a
	{
		display: table-cell; 
		vertical-align: middle; 
		text-align: center;
	}
		.overlay img
		{
			padding: 10px;
			-webkit-border-radius: 10px;
			-moz-border-radius: 10px;
			background: #ffffff;
		}

.overlay:target { display: table; }