JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
        <title>Test</title>
        <link rel="stylesheet" type="text/css" href="main.css">
    </head>
    <body>
        <div id="container-outer">
            <div id="container-inner">
                <div id="header">
                    <div id="masthead">
                    </div>
                    <div id="top-nav">
                    </div>
                </div>
                <div id="middle">
                    <div id="left-column">
                        <div id="left-nav">
                            <p>Navigation</p>
                            <p>Navigation</p>
                            <p>Navigation</p>
                            <p>Navigation</p>
                            <p>Navigation</p>
                        </div>
                    </div>
                    <div id="content">
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                        <p>Content</p>
                     ...

CSS

#container-outer
{
    background-color:#ffffff;
}
#container-inner
{
    background-color:#c0c0c0;
    width: 976px;
    position: relative;
    margin: auto;
}
#header
{
    position: relative;
    width: 100%;
    height: 50px;
}

#masthead
{
    position: relative;
    height: 30px;
    top: 0;
    background-color: #800000
}

#top-nav
{
    position: relative;
    height: 20px;
    bottom: 0;
    background-color: #ffe4c4
}

#middle
{
    position: relative;
    background-color: #ffffff;
    min-height: 320px;
    width: 976px;
}
#left-column
{
    background-color:#ff0000; 
    width: 100px;
    height: 300px;
    position: relative;
    float: left;
}

#content 
{
    background-color: #00ff00;
    width: 800px;
    position: relative;
    right: 0px;
    float: right;
}

#footer
{
    background-color: #ffff00;
    width: 100%;
    height: 100px;
    position: relative;
    bottom: 0px;
    clear: both;

}

body, p
{
    margin: 0;
    padding: 0;
}