#flutuante {
	position:absolute; 
	width:376px; 
	height:265px; 
	z-index:2; 
	left: 556px; 
	top: 286px;
}
#principal {
	position:absolute;
	width:782px; 
	height:475px; 
	left:50%;
	top:50%;
	margin-left:-391px;
	margin-top:-237px;
	z-index:1; 
}