Summary  
This chapter covers the utility-first CSS approach, where small, single-purpose classes (for spacing, colors, and text styles) are combined directly in markup to build an element’s appearance.  

General domain of usage  
Web front-end styling and layout design

Tailwind CSS provides small utility classes to control spacing, colors, and text styles directly in your markup.

### Spacing
```
<div className="p-4 m-2">
  Content
</div>
```
- `p-4`: adds padding inside the element;
- `m-2`: adds margin outside the element.

### Colors
```
<div className="bg-blue-500 text-white">
  Content
</div>
```
- `bg-blue-500`: sets background color;
- `text-white`: sets text color.

### Text Styling
```
<p className="text-lg font-bold">
  Hello World
</p>
```
- `text-lg`: increases text size;
- `font-bold`: makes text bold.

Utility classes control one style at a time, and you combine them to build the final appearance.

Which statement correctly describes a Tailwind CSS utility class and its effect?

Learn how to build and style modern interfaces with Tailwind CSS using utility classes and reusable UI patterns. Apply spacing, colors, layout, responsive rules, and interaction states to create clean React components and prepare for Next.js projects.

Utility Classes Basics

Spacing

Colors

Text Styling