Turn this rough logo sketch into 8 professional logo variations:
1) Minimalist black line art on white.
2) Gradient blue-to-purple modern tech style.
3) Vintage badge with subtle distressed texture.
4) Neon glow logo on a dark background.
5) Watercolor artistic interpretation with soft edges.
6) Bold geometric version with simplified shapes.
7) Gold foil embossed look on dark card stock.
8) Hand-lettered organic style with natural curves.

Keep the core logo concept and symbol recognizable in every variation, but explore clearly different visual directions. Present all 8 versions in a 4×2 grid, each variation clearly separated with a small label beneath it. High resolution, 4K, suitable for client presentations.