I want to expand the margin of the add to cart button & shipping bar

Hi,

I want to put more margin between the free shipping bar and “add to card” button
on the Product detail page.

example link
https://herefan.com/shop/day6-mini-5th-album-the-book-of-us-gravity-random/

Like the attached image,
The space is too samll so I want to expand this space

Please let me know so i can fix it.