Build an enormous dark Gothic fortr...

Build an enormous dark Gothic fortress-city carved into the inside walls of a volcanic caldera. The fortress should feel like one coherent ancient megastructure rather than separate buildings placed on terrain. Include a monumental main gate, a massive central cathedral/keep, several distinct asymmetrical towers, deep courtyards, bridges spanning large gaps in the crater, terraces at different elevations, fortified galleries carved into the mountain, and dramatic lava channels flowing through the composition. Make the architecture highly layered with strong depth, complex rooflines, arches, buttresses, balconies, recessed façades, structural supports, and intentional transitions where buildings meet the mountain. Include believable usable interior spaces and circulation rather than making