JSFiddle - React, Tailwind, and code Playground

HTML

<div id="left">left</div>
<div id="right">right</div>

CSS

#left {
    width: 200px;
    float: left;
    background: #ccc;
    
    position: relative; top: 5px
}
#right {
    background: red;
    overflow: hidden;
}