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# Tailwind CSS LLMs.txt Documentation

> This document provides a comprehensive overview of Tailwind CSS utility classes, examples, and customization options. It covers various CSS properties like layout, spacing, typography, backgrounds, borders, effects, transitions, transforms, and more, explaining how to use Tailwind's utility classes to style web elements effectively and responsively.

This document details the documentation of Tailwind CSS utilities. It explains how Tailwind scans source files for classes, the importance of using complete class names, and how utility classes can be applied conditionally using variants for states (hover, focus), responsive breakpoints, dark mode, and other conditions. It also covers customization via theme variables and adding custom styles.

**Core Concepts (from styling-with-utility-classes.mdx & responsive-design.mdx):**

*   **Utility-First:** Style elements by combining many single-purpose utility classes directly in HTML.
*   **Constraint-Based:** Utilities general