body {
    background-color: #F0F0F0;
    font-size: 1.2em;
    font-family: Arial, Helvetica, sans-serif;
    color: #000000;
}


.centered-box {
	width: 600px;
	height: 150px;
	left: 50%;
	top: 50%;
	margin-top: -75px;
	margin-left: -300px;
	position: fixed;
}

* html .centered-box { 
	position:absolute;
}