An approximation of some common styles from Ionic's CSS components, adapted for NativeScript.
Just grab the app.css file and slap it in the app folder of your own NativeScript project.
Option 1: Take a look at the extensive getting started docs on nativescript.org if you are comfortable with command-line tooling.
Option 2: Try a free 30-day trial of Telerik Platform, which handles SDK management, cloud builds, and provides additional services to support NativeScript app development.
The sample app itself is based on Burke Holland's sweet Nova theme for NativeScript.
Apache License (v2)