Custom CSS styles

Hello,
is it possible to add a section for “advanced” users where you can add your own css?
It should be just a text area in the admin interface, where you can add your own css which is loaded after all other css in the frontend.
That would be a nice feature.
All in all it’s just a nice and easy to use plugin. Like it!

https://ww.wp.xz.cn/plugins/admin-custom-login/