<style>
	html {
		background-repeat: no-repeat;
		background-position: 50% 0;
		background-image: url( 'img/index-mobile.png' );
	}

	@media (min-width: 768px) {
		html {
			background-image: url( 'img/index-tablet.png' );
		}
	}

	@media (min-width: 1024px) {
		html {
			background-image: url( 'img/index-desktop.png' );
		}
	}

	body {
		opacity: .5;
	}
</style>