New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

application.template.hbs

<div class="thingy">
  <p>hi</p>
</div>

styles.app.css

* {
  box-sizing: border-box;
}

html {
  background: linear-gradient(#ccc, #fff);
  padding: 16px;
  height: 100%;
  min-height: 100%;
}
body {
  background: linear-gradient(#fff, #ccc);
  padding: 16px;
  margin: 0;
  height: 100%;
  min-height: 100%;
}
div#root {
  background: linear-gradient(#ccc, #fff);
  padding: 16px;
  height: 100%;
  min-height: 100%;
}
div#root > .ember-view {
  background: linear-gradient(#fff, #ccc);
  padding: 16px;
  height: 100%;
  min-height: 100%;
}
.thingy {
  background: linear-gradient(#ccc, #fff);
  display: flex;
  padding: 16px;
  height: 100%;
}

.thingy > p {
  display: block;
  background: linear-gradient(35deg, #f00, #fa0);
  color: #fff;
  padding: 16px;
  margin: auto;
}

twiddle.json

{
  "version": "0.6.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember-template-compiler.js"
  }
}