Generate a massive fully undergroun...

Generate a massive fully underground Minecraft megabase inspired by a dark industrial human resistance city buried beneath the earth. IMPORTANT: - ALL major structures must be underground - NOTHING except small hidden access points should exist above ground - The dome chamber itself is underground inside a giant excavated cavern - The build is beneath a relatively flat meadow/plains biome near sea level - Style should feel brutalist, industrial, militarized, ancient, improvised, and survival-focused - Avoid clean sci-fi or cyberpunk aesthetics - Heavy use of deepslate, stone, iron, pipes, chains, catwalks, scaffolding, warm industrial lighting, and rough cave integration OVERALL STRUCTURE ORDER (TOP TO BOTTOM): 1. Hidden surface access points 2. Descent tunnel network 3. Underground do