.module-overlay {
	position: absolute;
	top: 25px;
	bottom: 0;
	left: 0;
	right: 0;
	/** This is dimming the background to make the popup stand out. */
	background: rgba(0, 0, 0, 0.7);
	transition: opacity 500ms;
	visibility: hidden;
	opacity: 0;
	/** Make sure that it above all other elements on the page. */
	z-index: 99999;
}

/** Handler for when element id is selected with this class */
.module-overlay:target {
	visibility: visible;
	opacity: 1;
}