#nav-icon1 {
    width: 35px;
    height: 25px;
    position: relative;
    margin: 25px;
    -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-icon1 span {
    display: block;
    position: absolute;
    height: 5px;
    width: 100%;
    border-radius: 0;
    opacity: 1;
    left: 0;
    -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-icon1 span:nth-child(1) {
    top: 0px;
}
#nav-icon1 span:nth-child(2) {
    top: 10px;
}
#nav-icon1 span:nth-child(3) {
    top: 20px;
}
#nav-icon1.open span:nth-child(1) {
  top: 10px;
  -webkit-transform: rotate(135deg);
  -moz-transform: rotate(135deg);
  -o-transform: rotate(135deg);
  transform: rotate(135deg);
}

#nav-icon1.open span:nth-child(2) {
  opacity: 0;
  left: -60px;
}

#nav-icon1.open span:nth-child(3) {
  top: 10px;
  -webkit-transform: rotate(-135deg);
  -moz-transform: rotate(-135deg);
  -o-transform: rotate(-135deg);
  transform: rotate(-135deg);
}