In #31118, some vendor-specific selectors were combined in one rule-set. As pointed out in [this comment][1], this would result in the whole rule-set being ignored by all browsers, since one invalid/unrecognized selector invalidates the declaration block. This commit fixes it by defining a separate rule-set per selector. The list of vendor-specific selectors is also adjusted to better target the currently supported browsers. [1]: https://github.com/angular/angular/pull/31118/files#r296923652 PR Close #31252