CSS breakpoint labels

/*
Show CSS breakpoint labels for various screen widths
*/

body:after
{
	content: 'default';
	position: fixed;
	bottom: 0;
	left: 0;
	padding: 0.2em;
	font-family: monospace;
	color: #fff;
	background: red;
	font-size: 10px;
	z-index: 9999;
}

/*Breakpoint 1 ("tablet")*/

@media only screen and (max-width: 971px),
only screen and (-webkit-min-device-pixel-ratio: 2)      and (max-width: 971px),
only screen and (   min--moz-device-pixel-ratio: 2)      and (max-width: 971px),
only screen and (     -o-min-device-pixel-ratio: 2/1)    and (max-width: 971px),
only screen and (        min-device-pixel-ratio: 2)      and (max-width: 971px),
only screen and (                min-resolution: 192dpi) and (max-width: 971px),
only screen and (                min-resolution: 2dppx)  and (max-width: 971px)
{
	body:after
	{
		content: 'tablet';
		background: blue;
	}
}

/*Breakpoint 2 ("mobile")*/

@media only screen and (max-width: 734px),
only screen and (-webkit-min-device-pixel-ratio: 2)      and (max-width: 734px),
only screen and (   min--moz-device-pixel-ratio: 2)      and (max-width: 734px),
only screen and (     -o-min-device-pixel-ratio: 2/1)    and (max-width: 734px),
only screen and (        min-device-pixel-ratio: 2)      and (max-width: 734px),
only screen and (                min-resolution: 192dpi) and (max-width: 734px),
only screen and (                min-resolution: 2dppx)  and (max-width: 734px)
{
	body:after
	{
		content: 'mobile';
		background: green;
	}
}

/*Breakpoint 3 ("large")*/

@media only screen and (min-width: 1200px),
only screen and (-webkit-min-device-pixel-ratio: 2)      and (min-width: 1200px),
only screen and (   min--moz-device-pixel-ratio: 2)      and (min-width: 1200px),
only screen and (     -o-min-device-pixel-ratio: 2/1)    and (min-width: 1200px),
only screen and (        min-device-pixel-ratio: 2)      and (min-width: 1200px),
only screen and (                min-resolution: 192dpi) and (min-width: 1200px),
only screen and (                min-resolution: 2dppx)  and (min-width: 1200px)
{
	body:after
	{
		content: 'large';
		background: orange;
	}
}