Grid Garden – A game for learning CSS grid
Immediate learnings from the first 3 exercises:1. Grid columns and rows are 1 indexed instead of 0, ensuring a coming decade of mistakes due to the mismatch with Javascript (and, y'know, everything else) conventions for arrays.2. Grid extents use the "one more than end" convention instead of "length", which is sorta confusing.  But then they call it "end", which is even more so.(edit) more:3. grid-area's four arguments are, in order (using normal cartesian conventions to show how insane this is): y0 / x0 / y1 / x1.  Has any API anywhere ever tried to specify a rectangle like this?