Hello --
I've searched the usual resources for an answer to this, but haven't found anything satisfactory. We are finishing up our conversion from D6 to D7, and have gone with an AdaptiveTheme core in order to take advantage of the excellent mobile-friendly features. Overall, the site looks good on a small screen, with a search bar in the header and a very nice smartphone menu taking the place of our Superfish desktop menu. See http://50.199.193.172 for a live view.
We would however like to swap out the large desktop view header for a small .png logo whenever the site is accessed by smartphone or tablet. We use the 'Noggin' module to put a banner image of the library on the main page, but there seems to be nothing in the AdaptiveTheme or Noggin documentation that talks about changing the header based on device screen width.
Any pointers towards a solution would be greatly appreciated.
Best,
Darrell Eifert Lane Memorial Library