JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
       <style type="text/css">
        .container { 
                margin: 0 auto;
                width: 960px;
                height: 200px;
                border: 1px solid black;
        }
        .bottom-block { 
            position: absolute; 
            width: 100%;
            left: 0;
            bottom: 0;
        } 
        .bottom-content { 
            height: 200px; 
            border: 1px solid black;
            margin: 0 auto;
            width: 960px;
        }
        </style>
    </head>
    <body>
    <div class="bottom-block">
        <div class="bottom-content"></div> 
    </div> 
    <div class="container">
    </div> 
    </body>
</html>