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Citrus GFork CSS issue with FireFox

This is an issue with my script Citrus GFork on the forum using FireFox.

If you look at the image, you can see the search box on the right top corner is joined with the white section of the page. I would like to move it a little up into the header, but unable in FireFox but works fine in Chrome.

Any help in fixing the CSS is appreciated ^_^

Maybe :
#Head .SiteSearch {
float: right;
margin-top: -30px !important;
}

O.O
For the life of me, I couldn't figure it out. In chrome I could fix, in FF nothing.

Thank you :)

;-)