Why don't namespaces work in less css?

Question

css

When I try to call a simple Neuspace, I get compiler errors in WinLess

#a {
    .button {
        color: red;
    }
}

h1 {#a > .button}

In theory, everything is done as indicated on the off. site. But it doesn't work, why?

Answer 1

Hmm, sorry for the stupid question. Already figured it out myself. I thought it works like in PHP for example, but I forgot that it's CSS)))