hardydino/stage_gaznika ? reverse-engineered prompt

Build me a simple PHP web app for Stage Gaznika.

I want it to feel clean and lightweight, with a basic landing page and a few straightforward pages or sections that make the site look finished and usable. Please make the design responsive so it works well on phones and desktop, and keep the code easy to understand so I can update the content later without a lot of effort.

If there are any missing details in the repo, please set up sensible defaults and make the project runnable from the current structure. Keep the styling polished but simple, and organize things so it is easy to add more pages later if needed. If you need to check current best practices or look up anything online, go ahead and do that.