Custom code for footer in York

York evidently only allows for 4 Styles -- Normal, Hdg 1, Hdg 2 and 3. Client prefers a small font for footer, but the footer is automatically set to Normal, with no way to make it smaller than content style.

would appreciate any help with this. Here's the site: https://www.aaronbutlerart.com/

Many thanks in advance.

add to Home > Design > Custom CSS

footer#footer p {
    font-size: 12px;
}