JSFiddle - React, Tailwind, and code Playground

HTML

<div id="top_block">$SITE_NAME$</div>
<div id="left_block">Menyu i drugoe</div>

CSS

@charset "utf-8";
body {
	margin: 0;
	background-color: #181b18;
	color: #fff;
}
#top_block {
	background-color: #0c0d0c;
}
#left_block {
	background-color: #121412;
	float: left;
	width: 20%;
}