Design a Logo, a Letter head, and an envelope.

I am looking for a designer to create a modern and minimalistic letterhead, envelope, and invoice for my business.

Preferred Style:
- Modern and minimalistic

Color Scheme:
- Neutral tones or colors

Specific Elements:
- The design should be left to the designer's discretion

Ideal Skills and Experience:
- Strong graphic design skills
- Experience in creating modern and minimalistic designs
- Ability to work with neutral color palettes