angular-cli how to add global styles?

As of the beta.14 release of the CLI (which uses Angular 2.0 final), a global stylesheet can be linked inside angular-cli.json under the “styles” key. This is a reference to a file relative to the src/ directory, which is style.css by default.

Leveraging this method you could:

• Copy the global styles into src/styles.css
• Use CSS imports to import external rules into styles.css
• Add more global styles via the apps[0].styles property in angular-cli.json

See also Global Styles in angular-cli‘s wiki.