Mastering Tailwind CSS 4

Tailwind CSS v4 brings a simplified configuration and a new engine written in Rust for blazing-fast builds.

No More tailwind.config.js?

One of the biggest changes is the move towards configuring Tailwind directly in CSS using CSS variables.

@theme {
  --color-primary: #3b82f6;
  --font-family-display: "Clash Display", sans-serif;
}

Dynamic Values

Tailwind v4 allows for more dynamic value usage without defining them in a config file beforehand. If you need a specific grid layout, just write it:

<div class="grid-cols-[200px_1fr_100px]">
  <!-- ... -->
</div>

Integration with Astro

In Gladtek, we’ve set up Tailwind v4 to work seamlessly with Astro’s styling model, ensuring that only the CSS you use is included in the final build.

Further Reading

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