public function createCssLoader(): CssLoader
	{
		$compiler = Compiler::createCssCompiler($this->files[self::CSS][null], $this->wwwDir . '/' . $this->outputDir);
		foreach ($this->filters[self::CSS] as $filter) {
			$compiler->addFileFilter($filter);
		}
		return new CssLoader($compiler, $this->httpRequest->getUrl()->basePath . $this->outputDir);
	}