Project URL: https://fluent-web.glitch.me/
I made a blank project that has a Fluent Acrylic-style background. The image is fixed to the top corner of the screen, and so it looks pretty cool when you drag it around. It is mostly CSS, with some JS to update sizes and positions. This could be pretty useful for PWAs on Windows, as MS doesn’t have a good design library for the web. I might add more components later, if I have time.
Video of me playing with it here.