You can create a custom style file in the “css” folder that is in the root of your PrestaShop installation.
The file should be named “custom.css”, and the module will include it for customizable products only
You can use this file to change the visual aspect of the product page or to hide certain elements.
Some knowledge about CSS is required.
In PrestaShop 1.7, the “css” folder in the root should be created manually