asciidisco.com/build/node_modules/css-mqpacker/test/fixtures/single-query.css

.foo {
  z-index: 1;
}

@media (min-width: 999px) {
  .foo {
    z-index: 4;
  }
}

.bar {
  z-index: 2;
}

@media (min-width: 999px) {
  .bar {
    z-index: 5;
  }
}

.baz {
  z-index: 3;
}

@media (min-width: 999px) {
  .baz {
    z-index: 6;
  }
}