I've made my site wider to accommodate more navigation buttons, but I've got a problem with my header. Firstly, I want to make the border lines wider to fit the new site size, and secondly I want to centre my header image. I've been looking through these forums but can't find how to do this (although I have found that I should probably be using a child theme, urgh).
Any help would be really appreciated! My site's at http://www.writerightnow.co.uk if you want to see what I mean.