DropMenu configuration

We’re currently working on the following site, using MODx:

http://www.lancsteenagepregnancy.org.uk/cms/

The titles are very wordy, but the client can’t shorten them... this is causing problems with accessibility - it’s hard to tell where one link ends and another one begins... so, we need to be able to put some space between the links. I’ve tried altering the css but have had no joy so far. Anyone have any tips? If so they’d be very much appreciated!

#menu .topnav li { margin: 0 0 1em !important }

The important-bit might not be necessary.

thanks rthrash, that sorted it, much appreciated