Hello.
It looks like you're using the Novator theme. For Novator, you should add the rule into this file instead: /extensions/novator/storefront/view/novator/css/tm_style.css
Alternatively, if you prefer not to edit theme files directly, there are extensions on the marketplace that let you add custom CSS safely without modifying the template, useful if you want to keep things update-proof.
It looks like you're using the Novator theme. For Novator, you should add the rule into this file instead: /extensions/novator/storefront/view/novator/css/tm_style.css
Alternatively, if you prefer not to edit theme files directly, there are extensions on the marketplace that let you add custom CSS safely without modifying the template, useful if you want to keep things update-proof.

