Webflow combo class not working

Hi guys.

I’m practising Webflow by working on a form similar to Cuberto’s contact page. I’ve used T.RICK’s Youtube video as a reference (Recreating Award Winning Micro-interactions in Webflow (2021) - YouTube).

The problem I’m facing is, I’m not able to change the typography color property of a combo class of an element.

Here is my site’s Read-Only: Webflow - Solaris Form

Please check the hosted site to see changes as the changes can’t be viewed because of the custom code. I want to play around with the ‘selected-toggle’ combo class of the ‘link’ element so that when it’s toggled, I can change the color of the text over the toggled link element. Any help would be appreciated guys. Thanks.