/*　ハンバーガーメニューボタン　*/
.header_menu {
  display : block;
  position: relative;
  z-index : 3;
  width: 58px;
  height: 58px;
  cursor: pointer;
  text-align: center;
  background-color: #ffffff;
  border-radius: 50%;
  margin: 0 1rem;
}
.header_menu span {
  display : block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  width: 24px;
  height  : 2px;
  background: #333333;
  -webkit-transition: 0.3s ease-in-out;
  -moz-transition   : 0.3s ease-in-out;
  transition        : 0.3s ease-in-out;
}
.header_menu span:nth-child(1) {
  top: 14px;
}
.header_menu span:nth-child(2) {
  top: 23px;
}
.header_menu span:nth-child(3) {
  top: 32px;
}
.header_menu span:nth-child(4) {
  top: 34px;
  background: none;
  width: fit-content;
  font-size: .8rem;
}

/* スマホメニューを開いてる時のボタン */
.header_menu.active span:nth-child(1) {
  top: 24px;
  left: 16px;
  -webkit-transform: rotate(-45deg);
  -moz-transform   : rotate(-45deg);
  transform        : rotate(-45deg);
}
.header_menu.active span:nth-child(2),
.header_menu.active span:nth-child(3) {
  top: 24px;
  left: 16px;
  -webkit-transform: rotate(45deg);
  -moz-transform   : rotate(45deg);
  transform        : rotate(45deg);
}

/* メニュー背景　*/
nav.header_menu_nav {
  position: fixed;
  z-index : 2;
  top  : 0;
  right: 0;
  background: rgba(255,255,255,0.9);
  width: max-content;
  transform: translateX(100%);
  transition: all 0.6s;
  padding: 3rem 8rem 3rem 3rem;
  border-radius: 0 0 0 2rem;
}
nav.header_menu_nav ul {
  margin: 0 0 1rem;
  padding: 0;
  width: 100%;
  min-width: 320px;
}
nav.header_menu_nav ul li {
  list-style-type: none;
  padding: 0;
  width: 100%;
  transition: .4s all;
  border-bottom: 2px solid #333333;
  font-size: 1.2rem;
  line-height: 1.2rem;
}
nav.header_menu_nav ul li:last-child {
  padding-bottom: 0;
}
nav.header_menu_nav ul li:hover{
}
nav.header_menu_nav ul li a {
  display: block;
  color: #333333;
  padding: 2rem .5rem 1rem;
  text-decoration :none;
}
@media screen and (max-width: 800px) {
nav.header_menu_nav {
  padding:2rem 1rem;
  width:95%;
  box-sizing:border-box;
}
}

/* クリックでjQueryで追加・削除 */
nav.header_menu_nav.active {
  opacity: 100;
  display: block;
  transform: translateX(0%);
  overflow: auto;
  height: 100%;
}