form-block Form Block field description font size increase

Looking for a way to increase the form field description text's font size for Form Blocks. The small grey text that displays below the field title is a bit too small and I want to make it larger.

Here's the option that worked for me in the CSS Editor:

.form-block .description {
  font-size: 18px !important;
}

Thank you IM_Design! 🙂