/**
 * Valid CSS units.
 */
$units: (
	// Percentage
	'%': 1%,
	// Length: absolute
	'px': 1px,
	'pt': 1pt,
	'cm': 1cm,
	'mm': 1mm,
	'in': 1in,
	'pc': 1pc,
	// Length: font
	'em': 1em,
	'rem': 1rem,
	'ch': 1ch,
	'ex': 1ex,
	// Length: viewport
	'vh': 1vh,
	'vw': 1vw,
	'vmin': 1vmin,
	'vmax': 1vmax,
	// Time
	's': 1s,
	'ms': 1ms,
	// Angle
	'deg': 1deg,
	'grad': 1grad,
	'rad': 1rad,
	'turn': 1turn,
	// Resolution
	'dpi': 1dpi,
	'dpcm': 1dpcm,
	'dppx': 1dppx,
);