JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box"></div>

CSS

.box {
  max-width: 600px;
  width: 100%;
  min-height: 300px;
  box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.7);
  margin: 40px;
}