How to fix layout with feature items in brine template(rally)

Hi! I am trying to get all three buttons to line up horizontally in medium/large screen view. I have figured out how to do it using a full width spacer, but now the buttons are stacked on top of each other on mobile, please help! I have tried to add custom CSS as well..but any ideas would be great!

Link to site: https://www.mindbodybrain.com.au/copy-of-introja

Thanks,Jill