#zentrierteEbene {
	height: 550px;
	width: 950px;
	margin-top: -280px;
	margin-left: -475px;
	position: absolute;
	z-index: 1;
	left: 50%;
	top: 50%;
	
}
body {
	background-color: #000000;
	margin-left: 0px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
}