Something

body {
	background: white url('img/bg.png') repeat-x bottom fixed;
	font-family: Calibri, Helvetica, sans-serif;
}

p { clear: both; }

.blue   { background-color: #4f80ff; }
.green  { background-color: #8cc63f; }
.gray   { background-color: #939598; }
.orange { background-color: #fcb040; }
.red    { background-color: #fc4040; }
.purple { background-color: #aa40fc; }

#introcontainer {
	width: 600px;
	height: 500px;
	margin: 5em auto 0 auto;
	text-align: center;
}

.intronav {
	display: inline;
	position: relative;
	left: 8px;
	float: left;
	color: white;
	width: 175px;
	padding-top: 8px;
	padding-bottom: 8px;
	margin-top: 3px;
	margin-right: 3px;
}

.introbox {
	width: 100%;
	margin: 25px;
	margin-bottom: 50px;
}

.contentbox {
	clear: both;
	width: 100%;
	margin-top: 25px;
}