div.overlayBackground {
	background: black;
	opacity: 0.8;
	width: 100%;
	height: 100%;
	position: fixed;
	top: 0px;
	left: 0px;
	z-index: 300;
	
	display: none;
}

div.overlayWindow {
	width: 500px;
	height: 250px;
	background: white;
	border: 1px solid black;
	border-radius: 10px;
	overflow: hidden;
	
	position: fixed;
	top: calc((100% - 252px) /2);
	left: calc((100% - 502px) /2);
	z-index: 305;
	
	display: none;
}

div.closeOverlayButton {
	border: 1px solid black;
	display: inline-block;
	vertical-align: top;
	padding-left: 10px;
	padding-right: 10px;
	height: 28px;
	line-height: 30px;
	color: white;
	text-shadow: 1px 1px 1px black;
	cursor: pointer;
	font-family: Roboto-CondensedBold;
	font-size: 16px;
	border-radius: 5px;
	overflow: hidden;
}