I'm working on a site using a responsive themeforest theme called Rising by a user called Der. I installed a theme update recently and since then, pages have been loading zoomed in to approx the top left quarter of the page when using an iPhone. It seems there is a problem with the theme detecting the screen size. This never occurred before the theme update.
Unfortunately, the author, Der, has recently closed his entire online presence without warning. The only explanation on his themeforest profile is the following:
"Officially retired. Themes are no longer available.
Unable to maintain due to unexpected personal issues. Apologies for any inconveniences caused."
I would appreciate any input on the above issue. The link to the site is: