.ast_preview_body.wp-customizer-unloading #overlay{
	position: fixed; /* Sit on top of the page content */	
	width: 100%; /* Full width (cover the whole page) */
	height: 100%; /* Full height (cover the whole page) */
	top: 0; 
	left: 0;
	right: 0;
	bottom: 0;
	background-color: rgba(7, 29, 87, 0.5); /* Black background with opacity */
	z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
	cursor: default; /* Add a pointer on hover */
}