@hello: "utf-8";
@charset @hello;

@-moz-document url-prefix(){
	div {
		color: red;
	}
}

@page :left { margin-left: 4cm; }
@page :right { margin-left: 3cm; }
@page { margin: 2cm }

@-ms-viewport {
    width: device-width;
}
@-moz-viewport {
    width: device-width;
}
@-o-viewport {
    width: device-width;
}
@viewport {
    width: device-width;
}