Design a massive Minecraft underwat...

Design a massive Minecraft underwater megabase for Survival mode, approximately 300x300 blocks. The base is built on the ocean floor and is fully connected with large glass tunnels. The main structure is a giant circular glass dome (70 block diameter) containing a central hub with a huge custom tree, beacon, map room, storage access, and bubble elevators. Connected to the hub are 10 different districts: - Automatic storage system - Villager trading hall - Enchanting library - Nether portal chamber - Aquarium with tropical fish, axolotls and turtles - Industrial district with furnaces and automatic farms - Living quarters - Trophy room and museum - Submarine dock - Research laboratory Outside the base, add coral gardens, custom rock formations, ruins, statues, glowing sea lantern pathwa