.hamburger_menu{
  margin:5px;
  clear:left;
  /*float:left;*/
  position: relative;
  cursor: pointer;
}

.hamburger_menu:hover{
  margin:5px;
  clear:left;
  position: relative;
  cursor: pointer;
}

.hamburger {
  float:left;
  margin-top:20px;
  margin-left:20px;
  margin-right:5px;
  margin-bottom:5px;
  width: 35px;
  height: 20px;
  /*position: relative;*/
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  /*top: 15%;
  left: 5%;*/
  cursor: pointer;
}
.bar {
  background: black;
  height: 3px;
  margin-bottom: 4px;
  border-radius: 30px;
  transition: width 0.3s cubic-bezier(0.5, -0.55, 0.6, 1.57);
}
.bar:first-of-type {
  margin-left:5px;
  width: 15px;
}
.bar:nth-of-type(2) {
  margin-left:5px;
  width: 20px;
}
.bar:nth-of-type(3) {
  margin-left:5px;
  width: 15px;
}
.bar:last-of-type {
  width: 20px;
}
.hamburger:hover>.bar:first-of-type {
  /*background-color: orange;*/
  width: 25px;
}
.hamburger:hover>.bar:nth-of-type(2) {
  /*background-color: orange;*/
  width: 10px;
}
.hamburger:hover>.bar:nth-of-type(3) {
  /*background-color: orange;*/
  width: 20px;
}
.hamburger:hover>.bar:last-of-type {
  /*background-color: orange;*/
  width: 15px;
}