There's no current way to download a theme from ZenDesk. It's only possible to edit a theme by copying/pasting into the ZenDesk code editor.
The Copenhagen theme is a good starting point for developing your own responsive theme.
This export allows you to work on your theme locally and at least be able to version control it in github. You will still have to copy/paste your edits into ZenDesk's theme editor to preview changes on the site.
All files named to match ZenDesk layout names in their theme editor.
- app.js - everything from the js tab in the theme editor
- style.css - everything from the css tab in the theme editor
- /assets/ is for any files you have uploaded to the asset tab
curlybars, css, js