JSFiddle - React, Tailwind, and code Playground

HTML

<div id="application_header">
  <div>logo</div>
  <div><h5>tagline</h5></div>
</div>

CSS

.clear  { clear:both; }
.push   { clear: both; height: 20px;}
#application_header { display:block; background-color: #000; color: #fff }
#application_header > div { display: inline-block }