CSS has defined container query.
https://www.w3.org/TR/css-contain-3/#container-queries

But it seems clean-css doesn't support it.

Is is possible to support it or any plugin / workaround for it?

Input CSS

@container (width<1024px) {
    .test {
        color: #fff;
    }
}

Actual output CSS

• Nothing by default options.

• Disable remove empty rules and nested blocks :

@container (width<700px){}

• Only enable level 0 (end bracket missing):

@container (width<700px){.test {color:#fff}

Expected output CSS

@container (width<700px){.test{color:#fff;}}