I hope I understood you question correctly
I believe that there is no way or need to customize admin console.
Your questions is more about user permissions. What I know is that you can't restrict user to create subspace if you give access to create spaces in the first place. In the system level you need to have "manage community" rights to create spaces. Or you need to give "
With user and space permissions you can control very widely what single users or user groups can or can't have access to.
Hi Teemu Luukkonen,
Thank you for your reply.
The thing is we would like a user to be able to edit a space they already have but not be able to create subspaces.
If there was a way to just turn off the ability to create subspaces that would be sufficient (unfortunately there does not seem to be a way).
And yes custom css does not seem to affect the admin-console either.