I built a website in epik and used CSS to style the home page widget areas. When I created the theme on a demo site, the widgets remained responsive.
Then I loaded epik into an existing website and created a custom CSS to make the site look the way I wanted.
However after doing that, the widgets were no longer responsive.
The website is http://www.aperfectsmileorthodontics.com
The plugins installed are:
Akismet
BackupBuddy
Genesis Simple Edits
Genesis Simple Hooks
Genesis Simple Sidebars
Google Analytics for WordPress
Gravity Forms
iThemes Security
Jetpack by WordPress.com
Revolution Slider
SEO Friendly Images
TinyMCE Advanced
WordPress SEO
WP-Mail-SMTP
WPtouch Pro
None of these plugins seem likely culprits. I turned off WPtouch pro and it made no difference.
Any advice would be really appreciated.