Diabale mobile View for CLients during development with CSS

@media (max-width: 768px) {
	html:before {
		content: 'DIE MOBILANSICHT IST DERZEIT NICHT FREIGESCHALTET!!!';
		width: 200px;
		/* height: 200px; */
		top: 50%;
		left: 50%;
		transform: translate(-50%, -50%);
		margin: 0 auto;
		position: absolute;
		padding: 20px;
		background-color: yellow;
		font-family: sans-serif;
	}
	body:not(.role-administrator ) {
		display: none;
	}
}