Center Add to Cart button & Color/Size Labels & Dropdown

Hi there. So there’s been some decent progress and I have Jetpack backups now, but after getting more CSS progress thanks to reading the forum here, I am finding difficulty with one more element on this theme page and this might be the final thing I need some assistance with.Thanks to those that have replied so far!

When looking at a single product page, be it desktop or mobile browser, I am finding difficulty with being able to center the Add to Cart button that’s positioned between the Apple Pay and PayPal buttons, right underneath the “-OR-” label on a single product page. The same would be needed for the “choose a size” and “choose a color” label above the quantity selector. What code or adjustments would you recommend I add to Highend options to make this work properly?

Doing a private reply with admin credentials so you can see this. Example page would be: https://vhhess.com/has/retro-clasp-womens-graphic-tee/