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GitHub User: mxstrand
When implementing the disable/grey-out feature on the "Draw Winner" button, the button wasn't "greying out" for me due to missing CSS styling in the layout.css.scss file.
During the first Ember railscast, I had grabbed the CSS styling per the below link. That CSS file however lacks the necessary styling for the grey-out.
Ember railscast #1 CSS
Ember railscast #2 CSS