rowanoulton/travelog-theme ? reverse-engineered prompt

Build me a clean, simple Jekyll theme for a travel and photography blog that feels elegant and works nicely on mobile too. I want a lightweight homepage, post pages, an about page, and a basic feed, with a style that makes photos stand out and keeps the writing easy to read. It should be easy to customize from the main config so I can change the site name, my details, and other basic settings without digging around too much.

Please make it ready to run locally with Jekyll and easy to deploy to GitHub Pages. Keep the design minimal, modern, and flexible enough that I can adapt it for my own blog. If you need to check current Jekyll or GitHub Pages guidance, look it up online first.