JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div id="section1">
		<div class="center">
		Section1
		</div>
	</div>
</body>

CSS

body{
	margin:0 auto;
    color:white;
	
}

div#section1 {
    height: 20vh;
    background: black;
    width: 20vh;
    position: absolute;
	top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
}