JSFiddle - React, Tailwind, and code Playground

HTML

<div id="master">
		<div id="head_billede">
		<img src="images/logo.png">
		</div>
			<div id="mainmenu">
				<table class="menu">
				<tr>
				<td width="150" class="passiv"><a href="index.php">FORSIDE</a></td>
				<td width="150" class="aktiv"><a href="/Labels-online">PRODUKTER</a></td>
				<td width="150" class="passiv"><a href="/Labels-online">INFORMATION</a></td>
				<td width="150" class="passiv"><a href="/Labels-online">KUNDECENTER</a></td>
				<td width="300" class="passiv"></td>
				</tr>
				</table>
		</div>
		<div id="indhold">
				<div id="content">
<img src="images/forside_img.png">
			    </div>
		</div>
				<div id="boxcontainer">
Some text
				</div>
		<div id="footer">
Some text
		</div>
	</div>

CSS

html, body {
	height: 100%;
	margin: 0px;
	padding: 0px;
	background-color: F0F0F0 ;
	font-family: Verdana, Helvetica, sans-serif;
	font-size:11px;
}

#mainmenu {
	height: auto;
	position: relative;
	padding-bottom: 10px;
}
#master{
	width: 300px;
	height: 100%;
	background-color:FFFFFF;
	margin-right: auto;
	margin-left: auto;
	overflow: auto;
	z-index: 1;
    box-shadow: 6px 0 4px  -4px #CCC , -6px 0 4px  -4px #CCC;
   padding-right:15px;
   padding-left:15px;
	position: static;
}
#indhold {
	position: relative;
	width: 100%;
	padding: 0px;
	margins: 0;
	height: 100%;
}
#content {
	position: relative;
	height: auto;
	border: 1;
	width: 650px;
	margin: 0px;
	padding: 0px 5px 0px 5px;
	text-align: left;
	display: block;
	float: left;
	clear: both;
}
#head_billede {
	position: relative;
	height: auto;
    padding-bottom:15px;
}

#footer{
	position: relative;
	height: auto;
	width: 950;
	height: 50px;
	margin: 0px;
	padding-top: 10px;
    	clear: both;
}
#boxcontainer {
	width: 950;
	position: static;
	margin: 0px;
	padding-top: 10px;
	padding-bottom: 10px;
    clear: left;
}

#box{
    margin-left: 10;
    margin-right: 10;
	min-height:150px;
	text-align: center;
	float: left;
	width: 275px;
    padding: 8px 8px;
	background-color: e9e9e9;
	border-radius: 5px;
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
	font-family: Verdana;
	font-size: 11px;
	color: 000;
	border:1px solid #CCCCCC;
}