My Shopify store needs its checkout page rebuilt to match a new design I already have in hand. The visual layout is final and ready to share as soon as we start, so the task centres on translating that mock-up pixel-perfectly into Shopify’s checkout environment and wiring up two core functions: • A clearly visible discount-code field that validates and applies existing coupon rules • Support for several payment gateways side-by-side so customers can choose the option that suits them best (the design shows the exact order and styling of each button) All styling, spacing, fonts and colours must match the design file exactly; responsiveness down to mobile widths is part of the job. Once implemented, a quick walkthrough of where the code sits and how I can turn individual payment methods on or off from the admin would be appreciated. Acceptance criteria 1. Checkout page visually identical to provided mock-up across modern browsers and mobile breakpoints 2. Discount codes apply correctly and reflect price changes in real time 3. At least three payment methods activated and working in live test mode 4. No core Shopify files permanently altered; custom code housed in sections or snippets so theme updates remain possible Please let me know your estimated turnaround time, any dependencies you need from me besides the design file, and a brief mention of past Shopify checkout customisations you have handled.