View URL in Xpages in the Client

I'm busy with a highly configurable FAQ database build with XPages.
The custom styling of the website is based on a Notes document, who is containing the styles.
I'm using relative url's like,

href="/css/e-office.css"

When I load the application in the Client then my styling is broken.
In the source I see a weird URL for my stylesheet.

href="/xsp/Paddington%20R8!!bb/faq.nsf/xsp/css/e-office.css?SessionID=ID12-147ef17222171000"

There is in the url een extra 'xsp' before the /css/e-office.css
How can I avoid this, because I think this is the cause that my stylesheet is not properly loaded in the client.