@matuzo @bramus Container queries do query an element already. But it looks like you're trying two things:

1. select all elements that have a style
2. style *the same element* that you queried/selected

I don't think we'll ever be able to do 1, because selecting an element based on it's own styles is the definition of an infinite loop.

But 2 is already how the if() function works. I guess @kizu already showed how you could put that in a universal selector.

@matuzo @bramus `if()` works like that, so in your case it could be

```CSS
* {
--bg: if(style(--btn-style: error): red);
}
```

It won't work if you'd have something like

```CSS
button {
--bg: green;
background: var(--bg);
}
```

for obvious specificity reasons, and if we would do `*:not( #a#b)` to bump it, it will override the `--bg`, _but_ we could do

```CSS
*:not( #a#b) {
--bg: if(
style(--btn-style: error): red;
else: revert-rule;
);
}
```

And this will work.