wp-calypso/client/dashboard/components/callout-overlay/style.scss

@import '@wordpress/base-styles/variables';

.dashboard-callout-overlay {
	position: absolute;
	min-height: calc( 100% - 2 * 161px ) !important; // Overriding VStack style
	width: calc( 100% - 2 * $grid-unit-20 );
	top: 0;
	left: 0;
	padding: 161px $grid-unit-20;
	background: linear-gradient(180deg, rgba(252, 252, 252, 0.65) 0%, #FCFCFC 100%);
	backdrop-filter: blur(3px);
	z-index: 1;
}