This article introduces Styleframe, a TypeScript CSS API designed for building scalable design systems. It highlights features like zero-runtime CSS generation, customizable themes, and seamless integration with design tools like Figma. Additionally, it showcases fluid responsive design principles for adaptive typography and spacing.

A collection of CSS custom functions is available that utilizes the native CSS @function rule, requiring no build step for integration. Currently supported in Chrome 141+, it includes around 43 functions for various tasks, including math, color manipulation, typography, and layout, making CSS more efficient and streamlined for developers.