The page tree mirrors how the community is actually organised, by mutual and by model, rather than the generic buy, sell and about structure most agent sites use. Two repeating units carry almost everything: the property card across every IDX surface, and the floorplan card across the library.
There are no city, postcode or region filters anywhere, because every property is in the same community and those controls would only add noise. Body copy holds at 18px on small screens, since the audience that most needs it is the one most likely to be reading on a phone at arm’s length.