JSFiddle - React, Tailwind, and code Playground

HTML

<div id="master_head"> </div>

CSS

#master_head{
width:99%;
min-width:320px;
border:1px solid red;
min-height:2em;
background:green url(http://nokiaindiacontest.com/ashalcm/images/nokia-asha-Width-banner.png) no-repeat top;
background-size: contain;	
height:10em;
}