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.