Hi Amit.
Thx for the fast support!
1) There is no change with the CSS code.
2) This is working.
3) That don′t seem to be an option – switch to ‘off’ also deactivate the whole filter / view section on top of the products list. Even if this wouldn′t be the style of the ‘Add to Cart’ Elementor widget is still overwritten. It seems the OceanWP or WooCommerce style for this button is more ‘agressive’. Any more ideas here?