Scroll State container queries

[argyleink]

spec https://www.w3.org/TR/css-conditional-5/#scroll-state-container
chrome status (with demo links) https://chromestatus.com/feature/5072263730167808
I2S https://groups.google.com/a/chromium.org/g/blink-dev/c/QelenpbN0Uc/m/WCo6SNFxCQAJ

[Schweinepriester]

In the hopes of better findability: scroll-state()