css/css-nesting/conditional-properties-ref.html

<!DOCTYPE html>
<title>Properties in nested conditional rules</title>
<link rel="author" title="Adam Argyle" href="mailto:argyle@google.com">
<link rel="help" href="https://drafts.csswg.org/css-nesting-1/">
<style>
  .test {
    background-color: red;
    width: 100px;
    height: 100px;
    display: grid;
  }

  @media (min-width: 50px) {
    .test-5 > div {
      background-color: green;
    }
  }

  @supports (display: grid) {
    .test-10 {
      background-color: green;
    }
  }

  body * + * {
    margin-top: 8px;
  }
</style>
<body>
  <p>Tests pass if <strong>block is green</strong></p>
  <div class="test test-5"><div></div></div>
  <div class="test test-10"><div></div></div>
</body>