The original title is "Tailwind CSS v4: Architecture, Features, and Performance Upgrades Deep Dive"

Short summary

A deep dive into Tailwind CSS v4's architectural overhaul, which replaces the PostCSS-based pipeline with a self-contained JavaScript engine for CSS generation. The new engine eliminates PostCSS dependencies, enables more granular optimizations, and improves build performance. The revamped plugin API integrates directly with the internal generation process for more powerful custom utilities.

• •Tailwind v4 replaces PostCSS with a standalone JavaScript engine for CSS generation
• •New architecture reduces dependencies and improves build performance
• •Revamped plugin API allows direct integration with Tailwind's internal state

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