The Power of CSS Variables

CSS Custom Properties (also known as CSS Variables) are a game-changer for web development. They allow you to define reusable values that can be updated dynamically.

Defining Variables

```css :root { —color-primary: #38bdf8; —spacing-md: 1rem; } ```

Using Variables

```css .btn { background-color: var(—color-primary); padding: var(—spacing-md); } ```

Theming

One of the best use cases for CSS variables is theming. You can easily switch between light and dark modes by updating the variable values.