JSFiddle - React, Tailwind, and code Playground

HTML

<div class='wrapper'>
    <div class="navcontainer">
        menu
    </div>
    <div class="featuredcontainer">
        content
    </div>
</div>

CSS

.wrapper{
    width:752px;
    margin: 0 auto;
    overflow:auto;
}
.featuredcontainer {
    width: 450px;
    height: 700px;
    float:left;
    border: 1px groove grey;
}
.navcontainer{
    float:left;
    height: 600px;
    width: 300px;
    background:#ff0;
}