What's the proper way to add OS specific styles in RC3

Ionic Framework ionic-v3
1

So I’m upgrading my app from Beta 11 to RC3. There used to be the app.ios.scss and app.md.scss which allowed you to add android specific and ios specific styles.

But it’s not there anymore?

What’s the recommended way to add OS specific styles in RC3 now.

2

Anyone?

Do I have to add styles under
.md {
}

or
.ios {
}