Build a large two-floor industrial ...

Build a large two-floor industrial tech base for a modded Minecraft world. It sits on flat grass in an open meadow valley surrounded by cliffs, next to a village, so the style should be clean stone-and-wood industrial that fits a grassy highland setting. Keep every shape simple and rectangular so a survival player can build it by hand without any complicated geometry. OVERALL SHAPE - Footprint: 45 blocks wide (X) by 31 blocks deep (Z) - Two full floors plus a flat accessible roof - Each floor is 7 blocks tall inside (6 air + 1 ceiling) - Total height from ground to roof railing: about 17 blocks - Perfectly rectangular, no wings, no towers, no curves, fully symmetrical left to right BLOCK PALETTE - Outer walls: stone bricks - Support pillars: iron blocks, one every 6 blocks along a