JSFiddle - React, Tailwind, and code Playground

HTML

<div class="body">
    <div class="bg"></div>
    <div class="page">
        <div class="content">content</div><div class="aside">aside</div>
    </div>
    <div class="footer">footer</div>
</div>

CSS

html,body{
    padding:0px;
    margin:0px;
    height:100%;
    background:#bbb;
}
.body{
    position:relative;
    min-width:930px;
    min-height:100%;
}
.body:before{
    content:'';
    position:absolute;
    width:50%;
    top:0px;
    bottom:0px;
    z-index:0;
    left:0px;
    background:#fff;
}
.body:after{
    content:'';
    position:absolute;
    width:50%;
    top:0px;
    bottom:0px;
    z-index:0;
    right:0px;
    background:#bbb;
}

.bg{
    position:absolute;
    margin-left:-465px;
    width:930px;
    left:50%;
    top:0px;
    bottom:0px;
    z-index:1;
}
.bg:before{
    content:'';
    position:absolute;
    width:290px;
    left:0px;
    top:0px;
    bottom:0px;
    z-index:0;
    right:0px;
    background:#fff;
}
.bg:after{
    content:'';
    position:absolute;
    width:640px;
    right:0px;
    top:0px;
    bottom:0px;
    z-index:0;
    right:0px;
    background:#bbb;
}

.page{
    position:relative;
    margin:0px auto;
    width:930px;
    padding-bottom:100px;
    z-index:2;
}
.content{
    display:inline-block;
    width:290px;
}
.aside{
    display:inline-block;
    width:640px;
}

.footer{
    position:absolute;
    width:100%;
    height:100px;
    bottom:0px;
    z-index:4;
    background:#bbb;
}