JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<body>
<div class="container" style="border: 1px solid black;">
    <div class="inner" style="border: 1px solid red;"></div>
</div>

CSS

.container {
    width: 400px;
    height: 300px;
} 

.inner {
    position: relative;
    margin-left: 200px;
    height: 100%;
}