Lightning Components Developer’s Guide

Getting Started
Creating Components
Communicating with Events
Creating Apps
App Basics
Styling Apps
Using External CSS
Vendor Prefixes
Using JavaScript
JavaScript Cookbook
Using Apex
Using Object-Oriented Development
Using the AppCache
Controlling Access
Distributing Applications and Components
Debugging
Reference
PDF

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Styling Apps

An app is a special top-level component whose markup is in a .app resource. Just like any other component, you can put CSS in its bundle in a resource called <appName>.css.

For example, if the app markup is in notes.app, its CSS is in notes.css.