Help! Add to Cart button position on mobile

Site URL: https://nikswami.com/test

Hi!

I recently signed up for Squarespace 7.1 - but I've noticed that when a product block is added to my site, the add to cart / purchase button goes too far to the right on a mobile screen (it actually cuts off).

Is there a CSS code or something that can fix this? I contacted Squarespace, and they confirmed the issue is in the template itself, but said they'll look into fixing it in a future release (no timeframe can be given).

If anyone can help, I'd really appreciate it - it seems bizarre that they can't fix a simple button position until a future release?!

***UPDATE*** I've found some code that moves the button to the middle...but the text doesn't move with it lol any ideas? Here's the code I used for the button:

.product-block {
    overflow: hidden;
}

Thanks
Nik

Thanks @tuanphan - I really appreciate your help!

@tuanphanwhat about on desktop view? I think I may have done something in my design but i'm not sure how to un-do or fix it. 

Thanks a bunch in advance for the help!