protected function fixRelativePaths($content, $originalFile)
    {
        $cssParserSettings = CssSettings::create()->withMultibyteSupport(false);
        $cssParser = new CssParser($content, $cssParserSettings);
        $cssDocument = $cssParser->parse();

        $cssBlocks = $cssDocument->getAllValues();

        $this->fixUrls($cssBlocks, $originalFile);

        return $cssDocument->render();
    }