If you open devtools and change the value a css variable (other examples: change from a breakpoint or :hover... or anything else), this change happens in realtime, JavaScript is unable to detect this ...

CSS Property Properties are the various ways in which we can style HTML elements. They are written with the name of the property, the desired value, and end with a semicolon.

Web designers use CSS to turn basic HTML into cutting-edge visual layouts. Our getting-started guide tells you everything you need to know to understand it.

This site is a comprehensive reference guide to the CSS properties you’re most likely to use. There are a lot of these, like the authoritative and (justifiably) respected Mozilla Developer Network.

From little-known scroll-snap properties to astonishing new color palettes, here are 10 Cascading Style Sheets updates you won't want to miss.