It might be real, but still unusable because Firefox is the only browser that doesn't support it, and wont support it for a while: https://caniuse.com/?search=c

It might be real, but still unusable because Firefox is the only browser that doesn't support it, and wont support it for a while: https://caniuse.com/?search=container%20queries https://caniuse.com/?search=container%20queries