Generate a 70x70 Minecraft lobby is...

Generate a 70x70 Minecraft lobby island for a private RPG server. Japanese-inspired fantasy hub with stone paths, torii-style wooden gates optional, lantern lighting, and four large class selection areas arranged in a cross (north south east west). Center spawn platform 15x15 polished blackstone and smooth quartz. Each class area is unique: warrior courtyard with red accents, ninja dojo black stone, sura mystical purple platform, shaman cyan spiritual garden. Include small decorative walls, no floating random blocks, ground level only, suitable for Purpur 1.21.4 vanilla players. Cozy MMORPG character creation atmosphere.