@mixin absolute-fill {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
}

@mixin calc( $key, $val, $unit: em, $important: false ) {
	@if $important {
		#{$key}: calc(1 / $base-font-size * $val) + $unit !important;
	} @else {
		#{$key}: calc(1 / $base-font-size * $val) + $unit;
	}
}