Modern Shopify Product Showcase Website

I want a modern-style storefront built on Shopify that highlights my full product line while remaining lightning-fast, fully responsive, and search-engine friendly. The build should feel clean and uncluttered, with intuitive navigation that lets visitors drill down by category, search, and apply on-page filters without friction. Every product page will include an optional, downloadable PDF spec sheet, and the overall layout must translate perfectly from desktop to mobile.

Key elements I need in place:
• Customisable product categories and sub-collections managed through the Shopify admin.
• Ajax-based search and filter functions for a seamless user experience.
• A secure contact form—reCAPTCHA or equivalent—to protect against spam.
• Full Tawk.to live-chat integration, installed and tested.
• Lightweight, well-commented code (liquid, HTML, CSS, JS) to keep load times low and make future tweaks straightforward.
• On-page SEO fundamentals handled during build: clean semantic markup, meta titles and descriptions, alt tags, and fast-loading, optimised images.
• Delivery of all source files and theme code in a tidy package, ready for version control.

I’d like the final site deployed to my Shopify account, with a brief walkthrough of how to manage products, files, and basic page edits so I can stay self-sufficient once the project wraps.