Recommendations for a SSG blog template?

I want something that is:

• SSG (static site output)
• looks nice
• is a template I can use out of the box by just dropping in my content and configurations, rather than designing or building myself
• is not feature-poor. I want it to have features like footnotes, jump-to-section links, citations, on-hover pop-ups for citations or footnotes, syntax highlighting for code blocks, etc.
• nice to have: ability to draw basic graphs or diagrams (helps in technical explanations)
• is not too difficult to customize by editing the code directly, Customizing the looks, structure, or adding functionality if I needed

Programming language doesn't matter much. I can use whatever. I do have a preference for functional languages.

Eleventy seems like a great framework to do this, but as I said I want a template that's ready out of the box not just a framework. The blogging template I found for eleventy does not look as nice as I hope.