Tailwind CSS V4 Mastery Skill Philosophy: CSS-First Thinking Tailwind V4 represents a philosophical shift from JavaScript-centric utility frameworks to CSS-native, declarative styling . This skill installs that mental model: - Configuration is CSS — replaces - Speed is Architectural — Oxide engine (Rust) replaces JavaScript parser - Modern Standards First — Leverages , , CSS nesting - Performance as a First-Class Citizen — 10-100x faster than v3 The correct mental model for V4: "CSS is the source of truth. JavaScript configuration is outdated." --- Core Conceptual Landscape 1. The Oxide Engin…