Add new pseudo classes (after, nth-child, etc...)

[DarkRewar]

Unity announced that new pseudo classes are planned for 6.7 and beyond
Sad it took too much time to see those features on the roadmap…

@benoitd_unity

What should we prioritize next?

We’re planning beyond Unity 6.7 and want your guidance. The most-requested areas we’ve heard lately include:

• Figma-to-Unity import for UI Toolkit
• Particles and 3D objects in UI
• Soft masking
• Addressable Asset Bundles support
• Grid layout aligned with CSS Grid
• Additional CSS properties and selectors
  • Z-index, gap, media queries; pseudo-classes such as :first-child, :last-child, :nth-child
  • Additional units, such as vh/vw and em/rem
• Data bindings improvements
  • Event binding in UXML
  • Add support for non-attribute bindings, such as itemsSource, and UXMLObjects
  • Mock data source workflows
  • Streamline ListView bindings
  • Bindings debugging workflows
• APIs to manipulate UI assets and load UXML/USS at runtime