# Introduction

Copy-paste React utilities, hooks, and blocks installable with the shadcn CLI.

**Design System UI** is a collection of copy-paste developer utility components, hooks, and blocks for React. Each item is ready to drop into your project without locking you into a heavyweight package dependency.

Install anything from the catalog with the [shadcn CLI](https://ui.shadcn.com/docs/cli). Items land in your codebase as source you own, so you can read, adapt, and extend them like the rest of your app.

Start with [styles](/docs/styles) for the design system CSS foundation before installing components.

Browse [components](/components), [hooks](/utilities), and [blocks](/blocks) to find what you need, then follow the install command on each page to add it to your project.