I have been out of the web development loop for a long time but when I first learned CSS it was all about moving the web off HTML tables and moving into the resolution-flexible web we somewhat have today. CSS has been getting new features that browsers are supporting more now and there have been some seriously cool features gaining support with it that makes me wish I could spend all day playing with them!
Robb Owen has an article on CSS shaders that can now do masking effects like multiply, color-burn and color-dodge with images and has manipulated the feature to simulate holo-foil stickers, the Aurora Borealis and Light Leak effects, scroll to the bottom of the page if it's TLDR, to see the cool examples :
robbowen.digital
Robb Owen has an article on CSS shaders that can now do masking effects like multiply, color-burn and color-dodge with images and has manipulated the feature to simulate holo-foil stickers, the Aurora Borealis and Light Leak effects, scroll to the bottom of the page if it's TLDR, to see the cool examples :

Holograms, light-leaks and how to build CSS-only shaders - Robb Owen
Get a shiny WebGL look without actually using WebGL. In this article we take a look at how CSS blend modes unleash the potential of cool compositing effects without the need for JavaScript
