Sorry that didn’t work for you, it’s possible we’re looking at different things - I tested this on the X of Y page type. There’s no guide for this as this is additional functionality for those who know HTML/CSS, and if you understand CSS you can use the browser inspector to find the relevant CSS class to target with your styling.
- Preview your project.
- Right-click the element you want to style and click Inspect.
- In the inspector page find the class name for that element.
- In the example I shared change the ‘.input-answer’ for your new class and paste that into the Styles box.