#main_menu_burger{
  width: 35px;
  height: 30px;
  position: relative;
  margin: 30px;
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
  -webkit-transition: .5s ease-in-out;
  -moz-transition: .5s ease-in-out;
  -o-transition: .5s ease-in-out;
  transition: .5s ease-in-out;
  cursor: pointer;
  z-index: 101;
  display: inline-block;
  vertical-align:middle
}

#main_menu_burger span {
  display: block;
  position: absolute;
  height: 4px;
  width: 50%;
  background: #fff;
  opacity: 1;
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
  -webkit-transition: .25s ease-in-out;
  -moz-transition: .25s ease-in-out;
  -o-transition: .25s ease-in-out;
  transition: .25s ease-in-out;
}

#main_menu_burger span:nth-child(even) {
  left: 50%;
  border-radius: 0;
}

#main_menu_burger span:nth-child(odd) {
  left:0px;
  border-radius: 0;
}

#main_menu_burger span:nth-child(1), #main_menu_burger span:nth-child(2) {
  top: 0px;
}

#main_menu_burger span:nth-child(3), #main_menu_burger span:nth-child(4) {
  top: 13px;
}

#main_menu_burger span:nth-child(5), #main_menu_burger span:nth-child(6) {
  top: 25px;
}

#main_menu_burger.open span:nth-child(1),#main_menu_burger.open span:nth-child(6) {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}

#main_menu_burger.open span:nth-child(2),#main_menu_burger.open span:nth-child(5) {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

#main_menu_burger.open span:nth-child(1) {
  left: 5px;
  top: 7px;
}

#main_menu_burger.open span:nth-child(2) {
  left: calc(50% - 5px);
  top: 7px;
}

#main_menu_burger.open span:nth-child(3) {
  left: -50%;
  opacity: 0;
}

#main_menu_burger.open span:nth-child(4) {
  left: 100%;
  opacity: 0;
}

#main_menu_burger.open span:nth-child(5) {
  left: 5px;
  top: 15px;
}

#main_menu_burger.open span:nth-child(6) {
  left: calc(50% - 5px);
  top: 15px;
}

@media(max-width: 480px){
  #main_menu_burger{width:35px;height:25px}
  #main_menu_burger span{height:3px}
}