public function bodyClass($classes = [])
    {
        $classes = !is_array($classes) ? explode(' ', $classes) : $classes;
        $classes = get_body_class($classes);

        if (Framework::instance()->getThemeOption('navbar_location') === 'fixed') {
            $classes[] = 'fixed-nav';
        }

        $classes = apply_filters('novusopress_view_body_classes', $classes);
        $output = sprintf('class="%s"', implode(' ', $classes));

        return apply_filters('novusopress_view_body_class_output', $output);
    }