#nav-icon3 {
    margin: 17px auto;
    -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;
}

#nav-icon3 span{
    display: block;
    position: absolute;
    height: 1px;
    width: 34px;
    background: black;
    border-radius: 0px;
    opacity: 1;
    left: 10px;
    -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;
}

#nav-icon3 span:nth-child(1) {
  top: 0px;
}

#nav-icon3 span:nth-child(2),#nav-icon3 span:nth-child(3) {
  top: 11px;
}

#nav-icon3 span:nth-child(4) {
  top: 22px;
}

#nav-icon3.open span:nth-child(1) {
  top: 18px;
  width: 0%;
  left: 50%;
}

#nav-icon3.open span:nth-child(2) {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}

#nav-icon3.open span:nth-child(3) {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

#nav-icon3.open span:nth-child(4) {
  top: 18px;
  width: 0%;
  left: 50%;
}