Margins in distributed version are different from picocss documentation

[gerwin3]

Describe the issue

This is how a modal looks in the docs:

This is what it looks like in the preview demo:

Expected Behavior

Since they are both using similar code, it is expected they should look similar and have similar spacing. I have not been able to figure out what is different in pico.css version used in the docs. I changed my site to use the main.css file it loads instead of pico and now my modal and article styling look similar to the docs (which is also the better look IMO).

Environment

Linux, Firefox, latest version