.nav-toggle {
  position: fixed;
  z-index: 1000;
  top: 20px;
  right: 20px;
  width: 140px;
  cursor: pointer;
  transition: all 0.4s;
}
.nav-toggle:hover {
  opacity: 0.8;
}

.nav-menu-btn {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1003;
  transition: all 0.4s;
  opacity: 0;
}
.nav-menu-btn.active {
  opacity: 1;
}

.nav-close-btn {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1002;
  transition: all 0.4s;
  opacity: 0;
}

.nav-close-btn.active {
  opacity: 1;
}

.header-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 550px;
  height: 100dvh;
  overflow-y: scroll;
  border-left: 2px solid #33e9e9;
  background: rgba(0, 0, 0, 0.8);
  padding-top: 227px;
  visibility: hidden;
  transition: all 0.4s;
  opacity: 0;
  pointer-events: none;
  z-index: -100;
}

.header-nav.active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  z-index: 999;
}

.header-nav-inner {
  max-width: 414px;
  margin: 0 auto;
}

.nav-link {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.nav-link-item {
  color: #fff;
  font-size: 32px;
  font-style: normal;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.1em;
  padding-left: 33px;
  position: relative;
  transition: all 0.4s;
}

.nav-link-item:hover {
  color: #33e9e9;
  opacity: 1;
}

.nav-link-item:before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
  width: 23px;
  height: 23px;
  background-color: #fff;
  transition: all 0.4s;
}

.nav-link-item:hover:before {
  background-color: #33e9e9;
}

.nav-link-item:after {
  content: '>';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-56%);
  width: 22px;
  height: 24px;
  color: #fff;
  transition: all 0.4s;
}

.nav-link-item:hover:after {
  color: #33e9e9;
}

.nav-ws-link {
  margin: 40px 0;
}

@media screen and (max-width: 767px) {
  .nav-toggle {
    top: 0;
    right: 0;
    width: 82px;
  }

  .header-nav {
    width: 100%;
    border: 1px solid #33e9e9;
    padding-top: 0;
    display: flex;
    align-items: center;
  }

  .header-nav-inner {
    max-width: 354px;
  }

  .nav-link {
    gap: 40px;
    padding: 0 42px;
  }

  .nav-link-item {
    font-size: 24px;
    padding-left: 26px;
  }

  .nav-link-item:before {
    width: 16px;
    height: 16px;
  }

  .nav-link-item:after {
    width: 15px;
    height: 16pxpx;
  }

  .nav-ws-link {
    margin: 40px 0;
  }
  .nav-share-link {
    padding: 0 8px;
  }
}

/* メニューグレーアウト */

.nav-link .nav-link-item:nth-child(3),
.nav-link .nav-link-item:nth-child(4) {
  color: #838383;
  pointer-events: none;
}

.nav-link .nav-link-item:nth-child(3)::before,
.nav-link .nav-link-item:nth-child(4)::before {
  background-color: #838383;
}

.nav-link .nav-link-item:nth-child(3)::after,
.nav-link .nav-link-item:nth-child(4)::after {
  color: #838383;
}