Reskin and css to re-skin a new ecommerce site

I am building a new eCommerce site but need some inspiration for the design.
I need a design for the header and nav: mobile and desktop with main page and shop categories with products (mega nav)
Header styles
button styles
category page
featured products
and
Product page with main image / carousel
product ordering section: options and extras and buy

I have the site with its main functionality online to view with HTML
We have a logo and colourscheme agreed.