JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
    <div class="inner">s</div>
</div>
<div class="overlay" style="display: block;"></div>

CSS

html
{
	position: relative;
	min-width: 100%;
	height: 100%;
	min-height:100%;
}

body
{
    position: relative;
	min-width: 100%;
	min-height:100%;
	font-size: 100%;
}
.outer
{
	position: relative;
	top: 0em;
	left: 0em;
	width: 100%;
	height: 100%;
	background-color: #ffffff;
}

.overlay
{
	position: absolute;
	top: 0px;
	left: 0em;
	width: 100%;
	height: 100%;
	background-color: #000000;
	-moz-opacity: 0.50;
	-khtml-opacity: 0.50;
	-webkit-opacity: 0.50;
	opacity: 0.50;
	-ms-filter:"progid:DXImageTransform.Microsoft.Alpha"(Opacity=50);
	filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);
	filter:alpha(opacity=50);
	z-index: 6;
	display: none;
}

.inner
{
	position: relative;
	width: 100%;
	border: none;
	margin: 0em;
	padding: 0em;
	margin-top: 3.875em;
	overflow: hidden;
	z-index: 0;
}