/*　ハンバーガーボタン　*/
.hamburger {
  display: block;
  position: fixed;
  z-index: 3;
  right: 13px;
  top: 7px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  text-align: center;
}
.hamburger span {
  display: block;
  position: absolute;
  width: 30px;
  height: 2px;
  left: 6px;
  background: #eee;
  -webkit-transition: 0.3s ease-in-out;
  -moz-transition: 0.3s ease-in-out;
  transition: 0.3s ease-in-out;
}
.hamburger span:nth-child(1) {
  top: 10px;
}
.hamburger span:nth-child(2) {
  top: 20px;
}
.hamburger span:nth-child(3) {
  top: 30px;
}

/* ナビ開いてる時のボタン */
.hamburger.active span:nth-child(1) {
  top: 16px;
  left: 6px;
  background: #fff;
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

.hamburger.active span:nth-child(2),
.hamburger.active span:nth-child(3) {
  top: 16px;
  background: #fff;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  transform: rotate(45deg);
}