Shopify CSS Refinement Expert Needed – Pixel-Perfect Implementation

We need a Shopify CSS specialist to refine our existing Shopify store so it matches the approved reference design exactly (1:1). This is not a redesign and not a rebuild. This is strictly a visual refinement phase.
Reference design: store:
Password: 1230
Pages in Scope
Homepage
Product page
Collection page
Cart page
Global styles (typography, buttons, spacing system)
Objective
The live Shopify store must visually match the reference design across desktop and mobile.
This includes:
Layout and spacing
* Exact section spacing and vertical rhythm
* Alignment consistent with reference grid
* Consistent margins and padding across sections
Typography
* Exact font sizes
* Exact line heights
* Exact font weights
* Letter spacing
* Text alignment
Buttons
* Padding and sizing
* Border radius
* Colors
* Hover, focus and active states
Responsive behavior
* Desktop
* Tablet
* Mobile
* Correct stacking beha...