Increase font size on one sticky side button

Hello!

Thank you for the plugin! I use it on a lot of sites and love it!

I do have one request I haven’t been able to accomplish. I would like the Find a Doctor button to be larger text. I am using this css with no luck:

#ssb-btn-0 {
font-size: 26px !important;
}

That selector works for all styling, except the ability to change font size.

Thank you!

The page I need help with: [log in to see the link]