Underwater magic pixel art style

Eerie mystical deep-sea aesthetic. Clean geometric shapes with rounded corners and bold silhouettes. Palette dominated by deep navy, shadowy teal, bioluminescent turquoise, vivid purple, and accents of coral pink. Shading relies on two hard value steps with dramatic contrast between pitch-black shadow blocks and sharp glowing highlights. Damp stone, organic kelp, and smooth crystal forms rendered in flat color shapes. Ominous atmosphere.