Migrating from v3 to v4

Purpose

Migrate existing Tailwind CSS v3 projects to v4's CSS-first configuration, updated utilities, and modern color system.

Automated Migration Tool

Tailwind provides an automated upgrade tool:

npx @tailwindcss/upgrade@next

Requirements:

• Node.js 20 or higher
• Run in a new git branch
• Review all changes manually
• Test thoroughly