public function style($assets, $name, $path="", $cache=0, $version=false) {

        $path = $this->path($path);

        if(!$path) return null;

        $href = rtrim($this->pathToUrl($path), '/')."/{$name}.css".($version ? "?ver={$version}":"");
        $path.= "/{$name}.css";
        $tag  = '<link href="'.$href.'" type="text/css" rel="stylesheet" />'."\n";

        if($cache && file_exists($path) && (time() - filemtime($path)) < $cache) {
            return $tag;
        }

        $result = $this->compile($assets, "css");
        if ($result) {
            file_put_contents($path, $result);
            return $tag;
        }

        return null;
    }