Modern Monochrome Logo Creation -- 2

I’m refreshing my brand and need a clean, modern logo that works perfectly in a single-colour (black or white) palette. The look should feel current and professional—no vintage flourishes, no bright gradients—just strong, confident shapes and typography that hold up everywhere from a website header to a social-media avatar.

To make this practical for daily use, I’ll need:
• A scalable vector file (AI or SVG)
• High-resolution PNGs with transparent backgrounds
• An inverted version so it reads clearly on light or dark surfaces
• A brief style guide noting the font, spacing and usage tips

Please show me relevant samples of modern, monochrome logos you’ve produced and let me know how long you’ll need once the project kicks off.