JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

body {
  text-align:center;
}
.box
{
width: 225px;
color: #ffffff;
height: 250px;
text-align: center;
padding-top: 15px;
-webkit-box-shadow: 0px 0px 8px 0px #000000;
-moz-box-shadow: 0px 0px 8px 0px #000000;
box-shadow: 0px 0px 8px 0px #000000;
background-color:#666;
border-radius:15px;
/*float:left; Remove this*/
  display:inline-block; /*Add this*/
margin-right:15px;}