Styling issues

Hello there,
You can use this code to center the button:

.woocommerce ul.products li.product .top-product-section { text-align: center; }

For the stock instead, you can use this selector: .stock.
It should be enough but I cannot confirm since I cannot find the text on your products.

We haven’t heard back from you in a while, so I’m going to mark this as resolved – if you have any further questions, you can start a new thread.