Site layout for tablets (Cake PHP)

There is a ready-made website created with Cake PHP.
The site is, in fact, a photo album with minimal navigation and several sections.
There are several interactive pages on the site several pieces: this is the main page in the form of a navigation map of the site and several pages with an interactive map of Russia broken down by region (when hovering the cursor on the region, some information about this region appears).
The site looks normal on monitors, but is not adapted for tablets. It is necessary to make it so that it looks normal on the main models of tablets.
We provide a link to the site and source upon request.