I have tested these changes in Inspect Element with Firefox but with my live site at http://jazzforallages.com I cannot get them to show up through editing CSS in Customizer:
Thanks for reaching out to us! I would be happy to help you 🙂
I had a look in the source code of your theme, it seems there were a couple of missing parenthesis from the CSS in the Customizer.
Try to paste the following code in your Customizer (replacing its actual content – you may save the file before in case something wrong happens). customizer.css