Resolved Choosing or applying css to button in simple slideshow

I have Kidzy theme installed and need to change style of the buttons in the home page slider from 3d to outline. How can we do this please?

On my test site here you will see the buttons using custom css for this page:
parents-and-toddler-classes

and we need this style applied in the home page slider:

home-page

We have styled those small buttons in our custm.css and used the same button ID to paste them into Joomla articles where needed. The button is to the same URL.

Thanks if you can help!