.hamburguesa {
  left:0px;
  transition: 250ms;
  -webkit-transition: 250ms;
  -moz-transition: 250ms;
  -o-transition: 250ms;

}
#MainContent.with-left-panel {
  transition: 250ms;
  -webkit-transition: 250ms;
  -moz-transition: 250ms;
  -o-transition: 250ms;
}

.panel{
    left: -180px;
    transition: 250ms;
    -webkit-transition: 250ms;
    -moz-transition: 250ms;
    -o-transition: 250ms;
}