JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
    <div id="leftcolumn">
        Left
    </div>
    <div id="rightcolumn">
        Right
    </div>
</div>

CSS

body {
    background-color: #444;
    margin: 0;
}

#wrapper {
     width: 1005px;
     margin: 0 auto;
    position: relative;
}
#leftcolumn, #rightcolumn {
    border: 1px solid white;
    min-height: 750px;
    color: white;
}
#leftcolumn {
     width: 250px;
     background-color: #111;
    min-height: 100px;
    position: fixed;
}
#rightcolumn {
     width: 750px;
     background-color: #777;
    float: right;
}