Anything you can build in a self-contained HTML file, you can publish as a post.
Everything here — layout, colors, spacing — lives in a single standalone HTML document
with its own <style>. The blog engine loads it inside an <iframe>,
so its styles never collide with the rest of the site, and the post frame auto-sizes to fit.
Diagrams, animations, small demos, charts, custom layouts — if it renders in a browser, it works here. Replace this file's contents with your own and keep the frontmatter comment at the top.
Start the file with the frontmatter comment (title, date,
tags, description), then write your standalone HTML below it.
That's the entire format.