Shopify Header Redesign: CSS

I'm seeking a Shopify expert to fix and redesign the header of my website. The primary goal is to enhance the site's aesthetics to a more bold and vibrant style.

Key Responsibilities:
- Fix existing header issues
- Redesign header to be bold and vibrant
- Ensure inclusion of key elements: Logo, Navigation menu, Search bar

Ideal Skills:
- Extensive experience with Shopify
- Strong graphic design capabilities
- Ability to create a user friendly interface while improving the site's aesthetics

Please provide relevant portfolio pieces showcasing your ability to create bold and vibrant designs.