/**
 * Generate a drop shadow depending on the depth specified
 *
 * @param 		{Integer} 			$depth 							The depth wanted (1,2,3,4,etc...)
 * @param 		{Color} 			[$color=rgba(0,0,0,.2)] 		The drop shadow color
 *
 * @example
 * .my-cool-element {
 * 		\@include s-depth(2);
 * }
 *
 * @author 	 		Olivier Bossel <olivier.bossel@gmail.com> (https://olivierbossel.com)
 */
@mixin s-depth($depth, $color: rgba(0, 0, 0, 0.2)) {
  @include s-filter(box-shadow(#{$color} 0 #{$depth * 2px} #{$depth * 3px}));
}