reposition search box in menu twenty eleven child theme

Hi,

I am for the first time playing with .css using a child theme of twenty eleven. It’s going really well – I have had a lot of success with these forums, but now I am stuck on a few issues that I am sure will be simple for someone out there!

This one is about my search box. I think that it used to be centered in the menu bar, but then I made the menu box bigger and now it is no longer vertically centered.

I found a few bits of code relating the the search box in the original style.css but when I copied them into the child and started making changes nothing seemed to work.

If anyone could point me to the line of code which dictates the vertical position of the search box then that would be great.

Thank you!!