Personal Payment Registration System

My personal payment system for receiving work payments and project subscriptions — fully merged and integrated inside the official site.

This payment registration system is a custom-built solution for processing work payments and project subscription fees, featuring full credit card validation, 3D Secure simulation for safety testing, and automated receipt generation. Developed using HTML5, CSS3, JavaScript, and Firebase, the system validates card numbers using the Luhn algorithm, verifies expiration dates and CVV codes, and generates downloadable PDF receipts with transaction details. The form includes animated input fields with real-time validation feedback, a secure data flow that never stores sensitive card information, and a Telegram notification integration that alerts the developer of new incoming payments. Originally a standalone tool, it has been fully embedded into the official portfolio site under the /payment route.