# Tailwind CSS v4.1.0 — Release & Upgrade Intelligence
- **Product:** Tailwind CSS (https://tailwindcss.com)
- **Version:** v4.1.0
- **Released:** Apr 01, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/tailwind/updates/v4.1.0/

## Executive Summary (TL;DR)
Tailwind CSS v4.1.0. Source highlight: Add `details-content` variant (#15319)

## New Features
- Add `details-content` variant (#15319)
- Add `inverted-colors` variant (#11693)
- Add `noscript` variant (#11929, #17431)
- Add `items-baseline-last` and `self-baseline-last` utilities (#13888, #17476)
- Add `pointer-none`, `pointer-coarse`, and `pointer-fine` variants (#16946)
- Add `any-pointer-none`, `any-pointer-coarse`, and `any-pointer-fine` variants (#16941)

## Bug Fixes
- Follow symlinks when resolving `@source` directives (#17391)
- Don't scan ignored files for classes when changing an ignored file triggers a rebuild using `@tailwindcss/cli` (#17255)
- Support negated `content` rules in legacy JavaScript configuration (#17255)
- Interpret syntax like `@("@")md:…` as `@md:…` in Razor files (#17427)
- Disallow top-level braces, top-level semicolons, and unbalanced parentheses and brackets in arbitrary values (#17361)
- Ensure the `--theme(…)` function still resolves to the CSS variables when using legacy JS plugins (#17458)

## Upgrade Command
```bash
npm install --save-exact tailwindcss@4.1.0
```