I am looking for a pixel artist to create a 16x16 Top-Down Dungeon Tileset for my strict grid-based puzzle game.

The Golden Rule (NO Transparency):
My game engine requires perfectly solid 16x16 blocks. There can be NO transparent pixels in this tileset. Every single 16x16 square must be 100% filled with pixels.

1. The Wall System & Baked Shadows (Top Priority):
I need a 16-piece modular wall system (corners, edges, center, etc.). Because we are not using transparency, the 'outside' or unplayable areas of the walls must fade into pure black (darkness), exactly like the attached reference image.

Top wall tiles: Must fade to pitch black at the top.

Bottom wall tiles: Must fade to pitch black at the bottom.

Left/Right wall tiles: Must fade to pitch black on their respective outer sides.

Center/Fill tiles: A wall tile surrounded by other walls on all 4 sides should be completely black (the void).

2. Specific Mechanics (Must also fit strict 16x16):

Base Floor: A standard dungeon floor tile.

Bridge: A simple bridge tile.

Fire Trap: A fire-shooting mechanism tile.

Floor Button: A pressure plate/button that is exactly the same color/texture as the base floor, but looks slightly raised (this will be used to trigger the fire trap).

3. Optional Additions:
If you have the time/budget, I am open to water tiles, doors, or teleport pads, but these are completely optional. My main focus and budget are going toward the flawless execution of the shadow-baked Wall System.

If you can execute this strict, no-transparency grid style, please let me know your price for this specific list!"