OJS (open journal system) website redesign

I need someone to customize and redesign a CSS stylesheet for my OJS "open journal system" website ([login to view URL]), including logo, banner, etc. The website is already there and working I simply need to change the look. I need the journal site to look like this one: [login to view URL] The candidate must have done some work on the open journal system or who can easily figure out this system: 1) OJS documentation: [login to view URL] 2) OJS css customization examples: [login to view URL] It's a free open access journal (with no adds), our budget is limited, so don't bid too high (around 250 USD) .