7 -webkit-justify-content: center;
8 -webkit-align-items: center;
9 -webkit-flex-direction: column;
14 border: 1px solid #e2e2e2;
15 box-shadow: 0 1px 1px rgba(0,0,0,0.2);
20 <video id="video" autoplay></video>
22 <button id="start">Start</button>
23 <button id="cancel">Cancel</button>
24 <button id="startFromBackgroundPage">Start from background page</button>
26 <script src="app.js"></script>