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This UI trick creates a vibrant gradient border around a card by layering two backgrounds: a solid fill clipped to the padding-box and a gradient clipped to the border-box. A transparent CSS border then allows the underlying gradient to show through, resulting in a crisp, scalable gradient outline. The effect can be instantly re-themed by animating a CSS hue variable.
This UI trick demonstrates how to implement a fully automatic light and dark mode theme using only CSS, leveraging the `color-scheme` property and the `light-dark()` function. It elegantly switches themes based on the user's operating system preference, requiring zero JavaScript and preventing any flash of unstyled content on load.
Generate an entire color palette—including shades, tints, and interactive states—from a single brand color using CSS's `color-mix()` function. This enables effortless re-theming of components by simply updating one CSS variable.