Don't use tailwind font size and h tags together, pick one

[egeakman]

h<n> tags overwrite tailwind font sizes. They shouldn't be used together, only one should be picked.

Originally pointed out by @hypha in #1008 (comment)

[hypha]

The card component (and others) has gone through a significant rewriting and cleanup, so the original problem is no longer present.

Plus, I think something else was wrong before. As far as I know, the tailwind classes should take precedence over the default h tags styling, so the h tags fulfils the hierarchical function. That didn't seem to be the case when the original issue was reported. But after Marcin's heroic cleanup, everything seems to work as it is supposed to be. So closing this with thanks.