css-tokens

Design tokens are centralized variables for colors, spacing, typography, and other UI properties. Define them in a tokens.css file using CSS custom properties (:root), then reference them throughout components with var() syntax to maintain a single source of truth for your design system.

Yes. Create separate token sets for light and dark modes, then override them using CSS selectors or a ThemeProvider that switches the active token set at runtime. Users can toggle themes without reloading while components automatically adapt via the same var() references.

A complete token system covers colors, spacing scales, typography (font sizes, weights, line heights), border radii, shadows, and animation properties. Organize them semantically with clear naming conventions and documentation comments so teams understand purpose and usage across CSS and TypeScript.

Reference tokens using CSS var() in your stylesheets or styled-component definitions. Generate a TypeScript tokens interface to enable type-safe token imports in JavaScript, allowing both CSS and component-level code to consume the same token definitions consistently.

Yes. Extend your token structure to include responsive breakpoint tokens and animation timing, easing, and duration values. Use them with media queries and keyframes to create scalable, maintainable responsive layouts and transitions across your UI.

Semantic naming (e.g., color-primary-hover instead of color-blue-600) decouples tokens from implementation details. When rebrand or update your palette, change one token value and all dependent components update automatically, making maintenance and theming changes straightforward.