mmistakes/minimal-mistakes ? reverse-engineered prompt

Build me a clean Jekyll theme for a personal site, blog, project docs, or portfolio that feels simple but polished. I want a two column layout with a nice homepage, post pages, archive pages, search, and a few different style options so people can pick a look that fits them. It should work well on GitHub Pages, support easy customization for colors and fonts, and make it simple to add things like a header image, sidebar, table of contents, galleries, related posts, and breadcrumbs.

Please make it SEO friendly too, with good social sharing metadata for Twitter and Open Graph. If possible, include support for common commenting options and basic analytics. The design should stay lightweight and minimal by default, but be flexible enough that someone can make it their own without much effort. If you need to check current docs or best practices while building it, go ahead and look them up online.