Generate a unique visual artwork that integrates a specified subject directly into a fully functional and scannable QR code. The QR code must accurately encode the following URL: `[INSERT TARGET URL HERE, e.g., https://www.example.com]`. The subject, which should be described as `[DESCRIBE THE VISUAL SUBJECT HERE WITH SPECIFIC DETAIL, e.g., 'a serene mountain lake at sunrise with reflections', 'a stylized portrait of a robotic cat', 'an intricate mandala pattern']`, should be integrated `[CHOOSE INTEGRATION STYLE: e.g., 'subtly blended into the background modules', 'prominently featured within the central region while maintaining scannability', 'formed by the negative space of the QR code modules']`. The overall artistic style of the combined image should be `[SPECIFY ARTISTIC STYLE, e.g., 'futuristic digital art', 'impressionistic painting', 'clean minimalist graphic design']`. Prioritize the absolute functionality and scannability of the QR code, ensuring the artistic integration does not compromise its readability.