JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="inside">
        <div id="offside">
        </div>
        <div id="center">
        </div>
    </div>
</div>

CSS

#container {
    width: 300px;
    margin: 0 auto;
}

#container #inside {
    margin-left: -100px;
    overflow: hidden;
}

#container #inside div {
    float: left;
    height: 400px;
}

#container #inside #offside {
    width: 100px;
    background-color: #ddd;
}

#container #inside #center {
    width: 300px;
    background-color: #f9f9f9;
}