I think it's just... art. And also a hobby. She likes doing this very fiddly, impractical way of working in her spare time. She could be putting together jigsaw

I think it's just... art. And also a hobby. She likes doing this very fiddly, impractical way of working in her spare time. She could be putting together jigsaw puzzles, she could be gardening, she could be making intricate motorized sculptures out of cardboard, she could be doing all sorts of things. But instead she takes the CSS skills that she uses for her day job and sees how far she can push them. Hell, at this point I wouldn't be surprised if she's even had people approach her asking for CSS portrait commissions. I'm sure the number she's quoted them is pretty large, if so. I'm a pro artist who mostly use Illustrator and I am pretty sure I could reproduce any of her pieces in a fraction of the time it took her to type them out by hand. If I did, nobody would care, because I'd be using a tool actually made for art.