JSFiddle - React, Tailwind, and code Playground

HTML

<div id="contents">Test</div>

CSS

#contents {
    float: left;
    width: 99%;
    border-radius: 1em;
    margin: .5% .5% .25% .5%;
    padding-left: 1em;
    background-color: #B7ECFF;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}