Instant Coupon Microsite with Social Sharing

I need a turnkey microsite that publishes discount codes and releases each code only after the visitor shares the promo on one of their social-media accounts (Facebook, X/Twitter, Instagram or LinkedIn are all fine). The flow should be straightforward: user lands on the page, clicks a “Share & Unlock” button, authorises the share, then immediately sees the unique code on-screen and in a confirmation email.

A simple rebrand option—logo swap, colour variables or a mini admin panel—will let me reuse the page across campaigns. The code bank must be easy to update (CSV upload or a small textarea in the admin is plenty). Responsive HTML5/CSS3 with vanilla JS or a light framework is preferred so the page loads quickly on mobile.

Deliverables:
• Fully functional microsite in a zipped package (or a staging link I can test)
• Clear install/setup guide
• Brief note on where to edit colours, logo and the list of discount codes

Once I confirm everything works as described, I’ll mark the job complete.