Font Size Problems

I’ve entered everything correctly but it keeps saying “Did you set the first paragraph’s font-size to 10px? It looks like it’s 11px” even though I’ve definitely set it at 10px. Help?

Here is what I’ve entered:

And it does come up with the correct outcome on the display thingy.

Do a google search:
disable minimum font-size chrome

Also make sure your browser zoom is set 100%

Thank you! That worked!