# File lib/nokogiri/xml/node.rb, line 205
      def css *rules
        rules, handler, ns, binds = extract_params(rules)

        prefix = "#{implied_xpath_context}/"

        rules = rules.map { |rule|
          CSS.xpath_for(rule, :prefix => prefix, :ns => ns)
        }.flatten.uniq + [ns, handler, binds].compact

        xpath(*rules)
      end