Age Gate How to make responsive?

Are there settings somewhere I am not finding that allow me to make Age Gate responsive so that when I look at my site on my phone I don’t have to use my fingers on the screen to make it large enough to read?

If it was a page on my site this is easy.

I don’t have time to figure out how to add code to the plug in to make it responsive.

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