JSFiddle - React, Tailwind, and code Playground

HTML

<div id="theme"><a href="http://aaa.com"><img src="https://ssl.gstatic.com/ui/v1/icons/mail/logo_default.png" /></a></div>
<div id="mainContent"> <a href="http://xyz.com">testlink</a></div>

CSS

#theme {
    position: absolute;
    top:0;
    left:0;
}
#mainContent {
    position: absolute;
    top:0;
    left: 0;
    background-color:#008800;
}