Make sure the code is clean and easy to understand for someone who might be learning. Include placeholders where users can customize the music URLs. Maybe add a note about adding more features step by step.

I should mention that this is a foundational example and suggest possible enhancements, such as integrating music APIs or using frameworks. Also, it's important to note that this is for educational purposes and real-world use might require more features like licensing and security.

.track button { background: #1db954; border: none; color: white; padding: 8px 12px; border-radius: 4px; cursor: pointer; }