class Sanitize::Transformers::CSS::CleanElement

def call(env)
  node = env[:node]
  return unless node.type == Nokogiri::XML::Node::ELEMENT_NODE &&
      env[:node_name] == 'style'
  css = @scss.stylesheet(node.content)
  if css.strip.empty?
    node.unlink
  else
    node.children.unlink
    node << Nokogiri::XML::Text.new(css, node.document)
  end
end