JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div id="header"></div>
    <div id="content">
        <div id="box1"></div>
        <div id="box2"></div>
        <div id="box3"></div>
        <div id="box4"></div>
         <div id="box1"></div>
        <div id="box2"></div>
        <div id="box3"></div>
        <div id="box4"></div>
         <div id="box1"></div>
        <div id="box2"></div>
        <div id="box3"></div>
        <div id="box4"></div>
        <span class="stretch"></span>
    </div>
    <div id="footer"></div>
</div>

CSS

.container {
    width: 100%;
    height: 100%;
    border: 1px solid black;
}

#header {
    border: 1px solid black;
    width: 100%;
    height: 50px;
}

#content {
	border: 2px solid #444;
	height: 125px;
	text-align: justify;
	-ms-text-justify: distribute-all-lines;
	text-justify: distribute-all-lines;
	padding-right: 25px;
	padding-left: 25px;
}

#content > div {
    border: 1px dashed black;
    width: 100px;
    height: 100px;
    vertical-align: top;
    display: inline-block;
    *display: inline;
    zoom: 1;
}

.stretch {
    width: 100%;
    display: inline-block;
    font-size: 0;
    line-height: 0;
}

#footer {
    border: 1px solid black;
    width: 100%;
    height: 50px;
}