variables-in-at-rules.css

@charset "UTF-8";
@namespace less "http://lesscss.org";
@keyframes enlarger {
  from {
    font-size: 12px;
  }
  to {
    font-size: 15px;
  }
}
@-webkit-keyframes reducer {
  from {
    font-size: 13px;
  }
  to {
    font-size: 10px;
  }
}