Center Align

@mixin center-align($dir: false) {
	$map: (
		top:  ( Y ),
		left: ( X )
	);

	@if map_get($map, $dir) != null {
		#{$dir}: 50%;
		transform: #{"translate#{map_get($map,$dir)}(-50%)"};
	} @else {
		transform: translate(-50%,-50%);
		top: 50%;
		left: 50%;
	}
}