@mixin linear-gradient($from, $to) {
  /* Fallback for sad browsers */
  background-color: $to;
  /* Mozilla Firefox */
  background-image: -moz-linear-gradient($from, $to);
  /* Opera */
  background-image: -o-linear-gradient($from, $to);
  /* WebKit (Chrome 11+) */
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, $from), color-stop(1, $to));
  /* WebKit (Safari 5.1+, Chrome 10+) */
  background-image: -webkit-linear-gradient($from, $to);
  /* IE10 */
  background-image: -ms-linear-gradient($from, $to);
  /* W3C */
  background-image: linear-gradient($from, $to);
}