Whirl-USS Framework

Whirl USS-Framework is a powerful, TailwindCSS-inspired styling framework built specifically for Unity’s UI Toolkit. Designed to bring the speed and flexibility of modern CSS frameworks to Unity, Whirl lets you build clean, scalable, and responsive UIs—faster than ever.

It intelligently scans your UXML and script files to generate only the utilities you actually use, keeping your USS files lightweight and optimized.

With full support for Unity-specific USS properties and advanced concepts like pseudo-classes, child selectors, and a custom-built media query system, Whirl extends the limits of what’s possible in Unity styling. It also includes utility-first design principles, powerful directives like @apply, @utility, and @theme, and full support for arbitrary values and properties—just like TailwindCSS 4.0.

Whether you’re creating adaptive UI layouts, dynamic game menus, or editor extensions, Whirl USS-Framework gives you the consistency, flexibility, and developer experience you’ve always wanted in Unity styling.

Key Features:

• Utility-first design: Style your UI using small, composable classes.
• Unity-optimized: Supports Unity-specific USS properties and values.
• Automatic optimization: Scans UXML and C# scripts to include only used utilities.
• Advanced features: Includes pseudo-classes, child selectors, group selectors and custom media queries.
• Tailwind-inspired functions: Use @apply, @utility, and @theme for scalable styling.
• Arbitrary values, properties & variants: Full flexibility like TailwindCSS 4.0.
• Extendable & future-proof: Built to grow with Unity UI Toolkit advancements.
• Open source (MIT): https://github.com/kostom-tee/WhirlUSS
• Detailed Documentation: kostom.net/whirluss