nav{
  width: 100%;
  height: inherit;
  position: relative;
}

.drawer{
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  position: relative;
  height: inherit;
  padding: 0 1em;
}

.navbar_toggle{
  z-index:9999;
}

.navbar_toggle_icon {
  position: relative;
  display: block;
  height: 2px;
  width: 30px;
  background: #5c6b80;
  -webkit-transition: ease .5s;
  transition: ease .5s;
}

.navbar_toggle_icon:nth-child(1) {
    top: 0;
}
.navbar_toggle_icon:nth-child(2) {
    margin: 8px 0;
}
.navbar_toggle_icon:nth-child(3) {
    top: 0;
}

.menu.open {
  -webkit-transform:translateX(0);
  transform:translateX(0);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.navbar_toggle.open .navbar_toggle_icon:nth-child(1) {
  top: 10px;
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
}

.navbar_toggle.open .navbar_toggle_icon:nth-child(2) {
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
  opacity: 0;
}

.navbar_toggle.open .navbar_toggle_icon:nth-child(3) {
  top: -10px;
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

.menu{
  -webkit-transform: translateX(-100%);
  transform: translateX(-100%);
  -webkit-transition:ease .5s;
  transition:ease .5s;
  z-index:1000;
  background: rgba(255,204,204,0.9);
}

.menu ul li{
	width: auto;
	border-bottom: 1px solid #FFF;
	text-align: center;
	font-family: 'ヒラギノ明朝 ProN','Hiragino Mincho ProN','TsukuARdGothic-Regular','Yu Mincho Light','YuMincho','Yu Mincho','游明朝体','Sawarabi Mincho',sans-serif;
	color: #963;
	width: 90%;
	margin: 0px auto;
	position: relative;
}

.menu ul li a {
	padding: 20px 0px;
	display: block;
}

.menu ul li:last-child {
	border: 0px;
}


/* PC */
@media screen and (min-width: 820px) {
nav{
  display: flex;
  flex-direction: row;
  width: 90%;
  margin: 0px auto;
  position: relative;
}

.navbar_toggle{
  display: none;
}

.menu {
	width: auto;
	height: 100%;
	-webkit-transform: translateX(0);
	transform: translateX(0);
	background: none;
	margin-left: auto;
	position: relative;
}

.menu ul{
	width: auto;
	height: 100%;
	display: table;
	table-layout: fixed;
}

.menu ul li{
	padding: 0px 20px;
	border-bottom: none;
	font-family: 'ヒラギノ明朝 ProN','Hiragino Mincho ProN','TsukuARdGothic-Regular','Yu Mincho Light','YuMincho','Yu Mincho','游明朝体','Sawarabi Mincho',sans-serif;
	color: #963;
	display: table-cell;
	width: auto;
	text-align: center;
	vertical-align: middle;
}
}