You might have noticed that integrating external plugins into the area will not work out of the box. This is also the case, for instance, if you try to upload some videos from the WP admin dashboard: the player will look broken.
This is because we are resetting CSS rules for each HTML tags to prevent your theme or some external plugins to affect the area. However, you might want to disable this if you want to integrate some external plugins into the area. However, this can generate graphic issues from your theme that should be fixed on your own (eg: the appearance of some components can maybe change, buttons for instance)
This code snippet will allow you to disable CSS resets:
add_filter('cuar/private-content/view/disable-css-resets', 'custom_cuar_disable_css_reset');
function custom_cuar_disable_css_reset() {
return true;
}