GSS is a 3D language for people who already speak CSS. Declare shapes in a @scene, style them with selectors, the cascade, custom properties, and @keyframes, and the compiler turns it all into a single raymarching shader (GLSL for WebGL2, WGSL for WebGPU). No Three.js, no meshes, no UVs. Drop a tag on any page, or try it live in the playground. Open source, Apache 2.0.