Kevin Powell dives into how CSS Subgrid and Container Queries work. This is a beneficial quick overview of the basics of these new CSS features. I expect that these techniques will become commonplace before long.

This is the best typography calculator I have seen. It calculates the font sizes, leading, and tracking, with options for modifying the baseline grid and font casing. Once you've fine-tuned everything, it can be downloaded as a table in an image (super useful for just popping into Figma for reference) or as a CSV file.

A very useful tool for calculating smooth transitions for typography between a minimum and maximum viewport width using the clamp() function in CSS.