WooCommerce.CSS Changes [Avada Theme]

I am wanting to change some properties on my WooCommerce products pages within my Avada theme, but I’m unsure of how to make a Child copy of the “WooCommerce.CSS” file in the “../themes/Avada/assets/css” directory. I already have my Avada-Child-Theme created…

Also, if I could get some help with the proper code for hiding the Quantity selector on the Products page when ordering, that would be great also…