/* Outline In */
@mixin outline-in {
	$outerBorderWidth: 4px;
	$innerBorderWidth: 4px;

	@include hacks();
	position: relative;

	&:before {
		pointer-events: none;
		content: '';
		position: absolute;
		border: $primaryColor solid $outerBorderWidth;
		top: -($outerBorderWidth + $innerBorderWidth) * 2;
		right: -($outerBorderWidth + $innerBorderWidth) * 2;
		bottom: -($outerBorderWidth + $innerBorderWidth) * 2;
		left: -($outerBorderWidth + $innerBorderWidth) * 2;
		opacity: 0;
		@include prefixed(transition-duration, .3s);
		@include prefixed(transition-property, "top, right, bottom, left");
	}

	&:hover:before,
	&:focus:before,
	&:active:before {
		top: -($outerBorderWidth + $innerBorderWidth);
		right: -($outerBorderWidth + $innerBorderWidth);
		bottom: -($outerBorderWidth + $innerBorderWidth);
		left: -($outerBorderWidth + $innerBorderWidth);
		opacity: 1;
	}
}