Design a massive, alien cathedral with intricate, biomechanical details. The structure should feel both sacred and sinister, with towering spires, organic-mechanical arches, and faint, glowing symbols. Use a dark, moody color palette with subtle accents of gold, red, and eerie green. The atmosphere should feel oppressive and awe-inspiring, with a sense of hidden power and ancient secrets. Focus on dramatic lighting to create deep shadows and striking contrasts <lora:training_5897863-20260124041810912:1>, ultra detailed, intricate details, cinematic, masterpiece