I'm creating an extremely challenging regex puzzle that combines multiple data types requiring advanced techniques. The text sample includes valid examples of emails with special characters, international phone numbers with varied formatting, leap year dates, ISO 8601 timestamps (with and without milliseconds/timezone), IPv4 and both full and shorthand IPv6 addresses, strictly valid URLs, typical programming identifiers, and a hexadecimal color code. I've also embedded distractors that are close... (truncated)