I would like new pages to have the same look as the rest of the site.
In the notes I found this:

- Adding a new pane
If you want your new pane to have the white "pod" look as other areas of Commons, simply give it a class of .commons-pod in the pane creation/edit page and it will have the look consistant with the rest of the site

.

I've tried adding that class to every part I could think of (the view itself, the CSS properties of the pane, the body CSS class of the page but I can't get it to work.

Where exactly is that class supposed to be added?