Using css to move a class to the left of its current position

Hi

I'm trying to move a menu to the left, and I think what I am missing in my css are the proper positioning/addition of the "Class" dots ".".

Here's a shortened URL to the site:

Link to page with menu

The menu is on the upper right and is controlled by the following in the html:

<ul class menu nav-pills _topMainRowbyMenu hidden-phone">

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Here's the css I have so far, and it is not affecting anything at all:

ul.menu nav-pills _topMainRowbyMenu hidden-phone {
margin-left: -100px;
}

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What mods do I have to make to the above to get it to work -- that is, move the top right menu a bit to the left.

Thanks

Rowby