the-glorious-startpage/css/body-background.css

/*Filter for body's lazy loaded background */

#bodyBackground {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
	overflow: hidden;
	color: var(--foreground);
}

.blurredBodyBackground {
	filter: blur(5px);
	-webkit-filter: blur(5px);
	transition: all 1s;
}

.unblurredBodyBackground {
	transition: all 1s;
}