First of all apologies if this is the wrong section to post this request (admin please move if needed). First time I have posted here in yonks.
I am wanting to use the default Opencart 2.0.3.1 theme on my next project to avoid the ususal problems of extension compatability, plus the fact that the default theme is very cool. Anyhow, I would like to alter the top header area to change the position and length of the seach bar to above the cart button AND allow for a bigger Logo than the current 33.333% restriction. Any clever people show me how to do this please? Probably pretty basic to most of you but I can't for the life of me make it so!

See screen shot attached.
Thanks in advance
Robster