Quote Originally Posted by pauland View Post
The browser viewport size (css size) is not the same as the device size in pixels. Browser window sizes are 'virtual' and not the same as the pixel size of the display. In the past they used to be equivalent, .....
ok -- that answers the missing 'logic - thanks!
so, per this and ACORN above -- how should I set my mobile site variant
(which needs to be viewed vertically)

thanks all!