less.js/test/less/media.less

// For now, variables can't be declared inside @media blocks.

@var: 42;

@media print {
    .class {
        color: blue;
        .sub {
            width: @var;
        }
    }
    .top, header > h1 {
        color: #222 * 2;
    }
}

@media screen {
    @base: 8;
    body { max-width: @base * 60; }
}

@media all and (orientation:portrait) {
    aside { float: none; }
}

@media handheld and (min-width: @var), screen and (min-width: 20em) {
    body {
        max-width: 480px;
    }
}

body {
  @media print {
    padding: 20px;

    header {
      background-color: red;
    }
  }
}