Twenty Eleven Theme Menu Issue

Hi,
I removed the title from my website, and it made the menu bar display in two rows. I tried to follow instructions on other threads which said to add:

#branding .only-search + #access div {
padding-right: 0px;

to the child theme’s css, which I have done. Unfortunately, it’s still not displaying in one line in my browser.

my website is: http://www.designworks.ca. Can someone please help?

Also, does it matter where in the CSS I add these lines? I am a complete newbie to CSS.