Tailwind CSS v4.0: Blazing Fast and Incredibly Flexible

Tailwind CSS v4.0 has arrived! This release is a complete overhaul of the framework, boasting massive performance improvements and increased flexibility. Full builds are up to 5x faster, and incremental builds are over 100x faster. Leveraging cutting-edge CSS features like cascade layers, custom properties, and `color-mix()`, v4.0 is designed for the modern web. Setup is simplified with fewer dependencies, zero configuration, and a single line of CSS. A new CSS-first configuration allows customization directly within your CSS, along with CSS theme variables, dynamic utility values, and variants. Other significant additions include a modernized P3 color palette, container queries, new 3D transform utilities, expanded gradient APIs, and `@starting-style` support. This release significantly enhances developer efficiency and user experience.