Hover/scss/effects/2d-transitions/_backward.scss

/* Backward */
@mixin backward {
	@include hacks();
	@include prefixed(transition-duration, $mediumDuration);
	@include prefixed(transition-property, transform);

	&:hover,
	&:focus,
	&:active {
		@include prefixed(transform, translateX(-8px));
	}
}