JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tab"><a href="#">This is a tab</a></div>
<div class="content">This is the content</div>

CSS

body {background-color: #ccf;}
div { background-color: #fff;
-webkit-box-shadow: 0 0 5px rgba(0,0,0,0.3);
-moz-box-shadow: 0 0 5px rgba(0,0,0,0.3);
}


.tab {float: right; height: 28px; }
.tab a {display: block; background-color: #fff; padding:  10px 20px;
text-decoration: none
}
.content {clear: both; padding: 10px; min-height: 100px;}