#ham {
    margin: 0 auto; right: 0; left: 0;
    width: 9em;
    height: 37px;
    top: 1.4em;
    bottom: 0;
    width: 5em;
    position: fixed;
    -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;
}
#ham span{
  display: block;
  position: absolute;
  top: -2px;
  height: 2px;
  width: 100%;
  background: var(--c1);
  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;
}

#ham:hover span:nth-child(1) {transform: translateX(20px);}
#ham:hover span:nth-child(2) {transform: translateX(-20px);}
#ham .span-change {background-color:#000}
#ham span:nth-child(1) {top: -2px; width: 60px; position: relative; transition: transform 0.2s ease;
}

#ham span:nth-child(2),#ham span:nth-child(3) {
  top: 8px; width: 60px; margin-left: 20px; position: relative;
}

#ham span:nth-child(4) {
  top: 18px;
}

#ham.open span:nth-child(1) {
    -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(-45deg);
  top: 11px;
  left: 20px;
}

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

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

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