Twenty Twelve: Specificity issues with heading font sizes & the block editor

[mrfoxtalbot]

TwentyTwelve font sizes on headings only work if you add a specific number. Adding the "preset" sizes does not work due to the theme's styles being too specific:

.entry-content h2 {font-size: 18px;}

This seems to prevent the less specific heading font sizes styles (which only use one class) from working.

.has-huge-font-size {
    font-size: 42;
}

I have also noticed an error in the inspector, I am not sure why the "42" there has does not specify px, rem or something.

[lukecarbis]

I'm not getting the 42 font-size issue, but I can confirm that Heading blocks in Twenty Twelve don't respect the Typography > Font Size setting on the frontend (though they do in the editor). It seems like it is indeed overridden by the .entry-content h2 class.