Minecraft modern vault structure, e...

Minecraft modern vault structure, exact size 10x10 blocks footprint and 15 blocks tall, compact and symmetrical design, futuristic modern style, built with iron blocks, smooth stone, black concrete and glass details, reinforced secure appearance, clean edges, minimal but detailed, central door or entrance, slightly elevated base, subtle lighting using sea lanterns or glowstone, no oversized elements, no extensions beyond 10x10, no floating blocks, realistic proportions, optimized for multiplayer server performance, compact build