Here's the new 2025 reset.css:
h1 { margin-block: 0.67em; font-size: 2em; }
Thank you for adopting this on all your sites!
See 
GitHub
Remove UA style for h1-h6 in section (et. al.) and hgroup · Issue #7867 · whatwg/html
If/when #7829 is merged, the following UA style doesn't make sense. Can it be removed? In the following CSS block, x is shorthand for the following...