css-variables

This Skill provides a centralized CSS variables system for theming by defining color, spacing, typography, border, and shadow design tokens in the :root selector. You apply these custom properties globally or scope them to individual UI components for predictable, maintainable styling.

Implement light and dark mode switching by defining theme-specific CSS variables and toggling them using data-theme attributes on a parent element. This allows the UI to swap brand variants or color schemes dynamically at runtime without rewriting component-level styles.

Scope CSS variables for component-level theming by defining custom properties directly within the specific component's selector block rather than the global :root. This creates predictable styling boundaries and allows easy, isolated overrides for individual UI components.

Yes, you can use this CSS variables system for multi-brand design systems. It supports defining global design tokens and switching brand variants or light/dark modes via data-theme attributes, driving UI changes across applications with minimal CSS modifications.

Use CSS custom properties for design tokens when you need runtime customization, dynamic theme switching, or component-scoped overrides. Unlike preprocessor variables, CSS variables live in the DOM and can be updated dynamically via data-theme attributes.