Logo Polish & Refinement — Chrome Extension Brand

I have an existing AI-generated logo for my Chrome extension that needs professional refinement. The concept is solid but needs a designer's touch to make it production-ready.

The logo is two interlocking chat bubbles. I need the geometry cleaned up, converted from gradient to flat solid colors, and optimized to look sharp at sizes from 16px (browser toolbar) to 512px.

Scope:
- Refine existing logo concept (not a full redesign)
- Flat color version (no gradients)
- Icon mark + horizontal wordmark
- Dark and light background versions
- SVG source files + PNGs at 16, 48, 128, 512px
- One alternate concept based on your creative interpretation of the brand — same deliverables

Brand colors: dark navy (#0a1624), green (#4ADE80), cyan (#22D3EE)
Audience: tech-savvy, gamers, young adults
Vibe: clean, modern, techy — not corporate

I'll share the current logo and a detailed design brief with the selected designer. Please include relevant portfolio examples with your quote.