// Returns a list of shared value from $list and $lists minus duplicates
// -------------------------------------------------------------------------------
// @documentation http://sassylists.com/documentation/#intersection
// -------------------------------------------------------------------------------
// @example intersection(a b c d, a c d, e d a f) => a d
// -------------------------------------------------------------------------------
// @param $list [List] : first list
// @param $lists [ArgList] : other lists
// -------------------------------------------------------------------------------
// @return [List]

@function intersection($list, $lists...) {
    $result: $list;

    @each $list in $lists {
        $temp: ();

        @each $item in $result {
            @if not not index($list, $item) {
                $temp: append($temp, $item);
            }
        }

        $result: $temp;
    }

    @return $result;
}