Thank you for the links, and I have reread those and a number of other documents and forum posts.
Unfortunately I do not understand it all. More used to work with CMS style overrides and the concept here doesn't seem to be override but instead replace.
Cannot find anywhere that it is possible to just add a custom.css to override existing css
As I understand It, I need to create a complete new style, add it to /var/cpanel/customizations/styled/thenewstyle/ and after that symlink that style to /var/cpanel/customizations/styled/default_style
But I only want to be able to change a couple of elements in the style.css via a custom style.css or similar.
Probably it is me not understanding, but to try to explain:
If I want to create a whole new style, I create it as above and add it to all users as above. But that makes all accounts using that style and if they change later to another style, the css added there will naturally not be in action.
Also updates to paper lantern will not be reflected in this added style so updates have to be added manually each time it is updated.
If possible I only want to override the style.css so regardless of what style the user chooses to use, that custom.css will be in action
If that is not possible, I can set paper lantern retro as style for all accounts and stop the possibility to change style for the accounts, but I still want updates to paper lantern and retro to be used.
So it is a simple override I am looking for.
Is this possible somehow?