body {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 9px;
	color: #000;
	background-color: #fff7b2;
}

.main {
	position:absolute;
	top: 50%;
	left: 50%;
	width: 719px;
	height: 478px;
	margin-top: -239px; /*set to a negative number 1/2 of your height*/
	margin-left: -360px; /*set to a negative number 1/2 of your width*/
	background-color: #e3dcb9;
}