Help! Increase & center logo size in Avada??

Please help!

I am having the hardest time coming up with the right CSS to increase the size of my logo and center it in the sidebar.

Disclaimer: I’m a total wordpress noob.

I’ve used firebug to play with the css – increasing the max height & margin-left properties does the trick, but when I paste the new CSS into the theme options, nothing happens.

I think I’m doing it wrong. Please help!

http://www.goldenempirevizslas.com

Thank you!