JSFiddle - React, Tailwind, and code Playground

HTML

<div class="contAin">
    <div class="tile">Some Content</div>
</div>

CSS

.tile {
  margin-bottom: 30px;  
  width: 80%;
  background: yellow;
}

.contAin {
  display: flex;
  justify-content: center;
  border: 1px solid red;
}