WooCommerce Product Page css

I’m new to WordPress/WooCommerce and I’m trying to do something I thought would have been simple.

The very basic WooCommerce Single Product page has the Product Attributes, they all appear under one big column.

Where can I actually modify the style and css for Product Page, so that I can have them in 2 (or more) columns instead of one big row?

I see the table is itself is generated under class “woocommerce-product-attributes” and “shop_attributes” ?