JSFiddle - React, Tailwind, and code Playground

HTML

<div>Hello World</div>

CSS

div
{
    background: rgba(25, 25, 25, .5);
    color: white;
    font-size: 20px;
    position: fixed;
    top: 10%;
    bottom: 10%;
    left: 10%;
    right: 10%;
}
body, html {
    height: 100%;

}
body {
    background: -moz-linear-gradient(to bottom, #FFFFFF, #0099ff);
    background: linear-gradient(to bottom, #FFFFFF, #0099ff);
}