Changing Links to Buttons on a Gallery Slideshow in 7.0

Site URL: https://arpelvichealth-rhctest.squarespace.com/

Hello, I've changed a still banner at the top of my homepage to a slideshow. The banner had a headline, text, and a button. Now that I've switched to slideshow, I no longer have a button option. Does anyone know a snippet of code that would change my CTA links to buttons here?

Add to Design > Custom CSS

section#services-gallery a {
    background-color: white;
    color: black;
    padding: 10px 20px;
}

Worked beautifully, thank you!