Hello,

HTML structure does not allow solving it by custom CSS. Such modification requires complicated Woocommerce code customization which is not covered by our support.

Please consider using the Woocommerce builder of WoodMart allowing to create custom templates for product pages and other functional pages that are not editable by default. Woocommerce builder is the inbuilt functionality widget included in the builder you use on the site.
Please check this manual:
https://xtemos.com/docs-cat/woocommerce-layouts-builder/?theme=woodmart
and https://xtemos.com/docs-topic/single-product-page-builder/

Best Regards.