header {
  overflow: hidden;
}

#nav-drawer {
  margin: 10px;
  position: relative;
  float: right;
}

/*チェックボックス等は非表示に*/
.nav-unshown {
  display:none;
}

/*アイコンのスペース*/
#nav-open {
  display: inline-block;
  width: 30px;
  height: 22px;
  vertical-align: middle;
  cursor: pointer;
}

/*ハンバーガーアイコンをCSSだけで表現*/
#nav-open span,
#nav-open span:before,
#nav-open span:after {
  position: absolute;
  height: 2px;/*線の太さ*/
  width: 28px;/*長さ*/
  border-radius: 3px;
  background: #555;
  display: block;
  content: '';
  cursor: pointer;
}
#nav-open span:before {
  bottom: -8px;
}
#nav-open span:after {
  bottom: -16px;
}

/*閉じる用の薄黒カバー*/
#nav-close {
  display: none;/*はじめは隠しておく*/
  position: fixed;
  z-index: 99;
  top: 0;/*全体に広がるように*/
  left: 0;
  width: 100%;
  height: 100%;
  background: black;
  opacity: 0;
  transition: .3s ease-in-out;
}

/*中身*/
#nav-content {
  margin: 0;
  overflow: auto;
  position: fixed;
  top: 0;
  right: 0;
  z-index: 999999;/*最前面に*/
  width: 80%;/*右側に隙間を作る（閉じるカバーを表示）*/
  max-width: 300px;/*最大幅（調整してください）*/
  height: 100%;
  background: #fff;/*背景色*/
  /* transition: .3s ease-in-out;滑らかに表示 */
  transition: none;
  -webkit-transform: translateX(105%);
  transform: translateX(105%);/*左に隠しておく*/
  /* opacity: 0.9; */
}

/*チェックが入ったらもろもろ表示*/
#nav-input:checked ~ #nav-close {
  display: block;/*カバーを表示*/
  opacity: .5;
}

#nav-input:checked ~ #nav-content {
  -webkit-transform: translateX(0%);
  transform: translateX(0%);/*中身を表示（右へスライド）*/
  box-shadow: 6px 0 25px rgba(0,0,0,.15);
}

/* 閉じるボタン   */
#nav-content .btnArea {
  text-align: right;
}
#nav-content .btnArea #close-btn {
  height: 45px;
  width: 60px;
  display: inline-block;
  padding-left: 10px;
  cursor: pointer;
}
#nav-content .btnArea #close-btn span,
#nav-content .btnArea #close-btn span:before,
#nav-content .btnArea #close-btn span:after {
  position: absolute;
  height: 1px;/*線の太さ*/
  width: 28px;/*長さ*/
  border-radius: 3px;
  background: #555;
  display: block;
  content: '';
  cursor: pointer;
  top: 25px;
}
#nav-content .btnArea #close-btn span::before,
#nav-content .btnArea #close-btn span::after {
  content: "";
  display: block;
  height: 100%;
  left: 50%;
  margin: -8% 0 0 -42%;
  position: absolute;
  top: 50%;
  width: 100%;
}
#nav-content .btnArea #close-btn span {
  background: rgba(51, 51, 51, 0);
}
#nav-content .btnArea #close-btn span:before {
  -webkit-transform: rotate(-45deg);
          transform: rotate(-45deg);
}
#nav-content .btnArea #close-btn span::after {
  -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
}
/* 中身を自分で */
#nav-content h2 {

}
#nav-content ul {
  list-style: none;
  padding-inline-start: inherit;
}
#nav-content ul li {
  height: 50px;
  text-align: center;
  padding-top: 13px;
}
#nav-content a {
  color: inherit;
  text-decoration: none;
}
#nav-content li:hover {
  /* background-color: #555; */
  /* color: #fff; */
  font-weight: bold;
  /* opacity: 0.7; */
}
#nav-content .menu-logo {
  width: 20%;
  margin: auto;
  position: absolute;
  bottom: 12px;
  left: 40%;
  opacity: 0.6;
}
#nav-content .menu-logo img {
  width: 100%;
}