Complete e-commerce solution for a nutrition supplement store, handling the full workflow from product browsing to payment and fulfillment. Built with PHP and MySQL, integrating 4 third-party services: Flouci payment gateway for real transaction processing, PHPMailer for automated order confirmation emails with PDF invoices, Twilio PHP SDK for SMS notifications, and DomPDF for professional invoice generation. Includes a shopping cart with session management, 6 product categories, secure checkout, and a comprehensive admin dashboard with sales analytics, order management, and product CRUD.