.hmbrgr {
  position: relative;
  display: inline-block;
}
.hmbrgr span {
  position: absolute;
  left: 0;
  width: 100%;
  background: #fff;
  display: inline-block;
}
.hmbrgr.expand span:nth-child(1) {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  transform: rotate(-45deg);
}
.hmbrgr.expand span:nth-child(2) {
  zoom: 1;
  filter: alpha(opacity=0);
  -webkit-opacity: 0;
  -moz-opacity: 0;
  opacity: 0;
}
.hmbrgr.expand span:nth-child(3) {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  transform: rotate(45deg);
}