Thesupereevee1/OploCenter ? reverse-engineered prompt

Build me a simple open source GitHub style replacement website, with a clean homepage, repo pages, user profiles, and a place to browse code, issues, and pull requests.

It should feel polished and modern, work well on desktop and mobile, and use a strong visual design since this project seems to be mostly about the look and feel. Keep the interface easy to navigate, with search, navigation, and clear sections for activity and repository details. If you need anything unclear, use sensible defaults and look up current docs online if you need to.