html, body {
  height: 100%;
}

body {
	background-image: url(/alphaclean-farbverlauf.svg);
	background-size: cover;
	width: 100%;
	padding: 0;
	margin: 0 auto;
}
.centerlogo {
	height: 100%;
	display: grid;
	justify-content: center;
	align-items: center;
	place-items: center;
}

.centerlogo img {
	width: 100%;
}