protected function findInput()
    {
        if (($input = $this->inputName())
            && strpos($input, '..') === false
            && substr($input, -5) === '.scss'
        ) {
            $name = $this->join($this->dir, $input);

            if (is_file($name) && is_readable($name)) {
                return $name;
            }
        }

        return false;
    }