Create a small hidden underground M...

Create a small hidden underground Minecraft stash base with a dark ocean theme. The build must be compact (maximum 50x50 blocks total) and survival-practical. Include 4-8 standard chest with hopper refill systems on each side: a visible chest on top with hoppers feeding into hidden double chests underneath the floor. Use dark prismarine, prismarine bricks, warped wood, cyan concrete, tinted glass, and subtle sea lantern lighting. Keep the ceiling 3–4 blocks tall. The design should feel like a secret underwater bunker — clean, symmetrical, and efficient. Add a hidden entrance such as a water elevator, hidden trapdoor in sand, or piston floor. Do NOT make a large base or megastructure. Keep it tight and stealthy.