Build a modern underground minecart...

Build a modern underground minecart metro/train station that is 18 blocks by 39 blocks. The train platform is 46 blocks below ground level. The building on ground level should be two stories tall. Include stairs to the platform, one on each side of the platform. Include stairs to the second level of the building as well. Incorporate the use of dark gray concrete, white glass panes, glowstone, sea lantern.