eg. If current user is part of the "Admin" SharePoint Group they will be able to see the details pane button/icon and if they are not they won't be able to see the details pane button/icon?
I'm aware this can be done like this for all users who view the out of the box SharePoint list view. However, my question is whether this CSS can be implemented based on conditions such as hide the details pane only if user is not a member of a "Admin" Sharepoint Group as an example.
Dear @sphilson,
Unfortunately, no article on that, as far as we're aware, but most things can be hidden or at least adjusted. Getting down to a specific thing requires to inspect the page closely in the browser with dev tools.
If you have any specific questions - let us know, we'll see if it can be done and how.