Please take a look at https://wordpress-435088-1398303.cloudwaysapps.com/checkout/ this is the checkout page and is all messed up with the fields.
I couldn’t find any custom CSS i had placed that would cause this.
I found this help article but suggested changes didn’t fix the issue. Ugly Checkout page for woocommerce
Here’s a product page - you will probably have to add something to your cart: https://wordpress-435088-1398303.cloudwaysapps.com/product/golf-shirt-embroidered-logo/