tailwindcss/docs/source/_assets/less/main.less

.foo {
  @apply .px-4;
  @apply .py-2;
  @apply .bg-blue;
  @apply .sans-alt;
}

.foo {
  background-color: red;
  @media (--breakpoint-sm) {
    // @class "py-2";
    background-color: green;
  }
  @media (--breakpoint-md) {
    background-color: orange;
  }
}

@responsive {
  .bar {
    color: orange;
  }
}

@tailwind utilities;

@responsive {
  .px-4 {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .py-2 {
    padding-top: .5rem;
    padding-bottom: .5rem;
  }
}

@responsive {
  .sans-alt {
    font-family: 'Brandon Text';
  }
}

.this-should-be-the-very-end {
  color: red;
}