Smashing Magazine is always a good place to stumble across links from. And as someone who last did CSS in earnest almost seven years ago, I really appreciated this complete rundown of how to use the CSS clamp function to get good responsiveness working in just a little bit of work.
The author, Adrian Bece, did lose me a bit at the end with all the math. But I got a much clearer sense of how to make fonts look good in an accessible way without breaking a sweat. Which was just what I wanted.