This is a better way to add CSS to individual Panel Panes. And really it is the way that it was designed to w0rk, i believe. Take a closer look at the SSs to see what is going on.
- Edit the Panel in the Panels Admin section of Drupal
- Edit the content of the Pane you want to be able to w0rk independently with
- Choose CSS Properties
- Add a CSS ID and a CSS Cl@ss save all this. I had to clear Cache to see what I needed after saving
- Using Firebug, track down the Login Block info.
- Highlight the Login-css-id div tag on the left
- Right click on the right hand side and choose Add Rule
- Make these Firebug “local” changes to test what you want
- When you are good with the change, transfer the syntax to the actual CSS file and save it
- Test your changes again.