Check this site: http://inlinestyler.torchboxapps.com/styler/convert/
It's originally a tool to inline CSS, but on run it gives you a report of which CSS rules are invalid for which devices.
Check this site: http://inlinestyler.torchboxapps.com/styler/convert/
It's originally a tool to inline CSS, but on run it gives you a report of which CSS rules are invalid for which devices.