I’m a big fan of Jekyll, and it meets your A and B requirements out of the box. Hugo lit a fire under them with regard to build speed, and the 4.x line is a huge speed boost. It does syntax highlighting with Rouge, and the default Markdown engine is Kramdown.
I never found a solution for requirement C that I liked, so I’ve been building my own. It’s still very rough and not exactly in shape to publish, but its capabilities already by far exceed my previous solution: https://github.com/okeeblow/DistorteD
I left my WIP site running (‘jekyll serve’ using WEBrick) on my laptop and I’m going to bed, so these links may get hugged or just crash and become unavailable, but here you can get an idea of what I’ve been playing with for multi-image layouts: https://beta.cooltrainer.org/distorted/
And on the index page is a random smattering of some other media types I’ve been testing, like support for image-rendering SVGs, TTFs, and old DOS-codepage Nfos, mbedding PDFs, etc: https://beta.cooltrainer.org/
I never found a solution for requirement C that I liked, so I’ve been building my own. It’s still very rough and not exactly in shape to publish, but its capabilities already by far exceed my previous solution: https://github.com/okeeblow/DistorteD
I left my WIP site running (‘jekyll serve’ using WEBrick) on my laptop and I’m going to bed, so these links may get hugged or just crash and become unavailable, but here you can get an idea of what I’ve been playing with for multi-image layouts: https://beta.cooltrainer.org/distorted/
And on the index page is a random smattering of some other media types I’ve been testing, like support for image-rendering SVGs, TTFs, and old DOS-codepage Nfos, mbedding PDFs, etc: https://beta.cooltrainer.org/
Anyway, big Jekyll fan. Try it out :)