JSFiddle - React, Tailwind, and code Playground

HTML

<div class="a1">
    as
</div>

CSS

body {
    margin: 0;   
}

.a1 {
    width: 300px;
    height: 1000px;
    margin: 0 auto;
    background:#ffffff;
    box-shadow: 0 0 40px rgba(0,0,0,.5);
}