JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
	<div id="left"></div>
	<div id="right">
		<p>Nulla vitae elit libero, a pharetrapharetrapharetrapharetrapharetrapharetrapharetrapharetra augue  club single dwa ra r3a 3ar 3ar 3a label in early 2002 under the artist name at3t. </p>
	</div>
</div>

CSS

* { margin: 0; padding: 0; }

#container {
	display: flex;
}

#left {
	flex-basis: 640px;
	background: pink;
}

#right {
	color: #000;
	background: red;
	flex: auto;
}