Transparent Nav Men Overlay - How to make a bit wider (Attention Kharis)

Hi Kharis,

Many many thanks again for assisting me to put a transparent overlay over the nav bar, it looks beautiful thank you!

Just one quick question, I do want to make the logo a bit bigger (I know how to do this), but I may need help with coding to make the transparent nav bar a bit bigger so that the logo fits in nicely, is there any way to alter the masthead site-header to be a bit wider to accommodate the logo so it does not over flow on the homepage?

This is what it looks like currently:

The URL is:

Many thanks