/* 作成者名: 羽祢田 */
.header {
  position: relative;
}
.header_container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  width: 17.5rem;
  padding: 2rem;
}
.logo_svg {
  height: 4rem;
  width: auto;
  fill: #18232e;
}
.site_title {
  margin-bottom: 1.5rem;
}
.header_nav_list {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.4rem;
}
.nav_item {
  font-weight: 500;
}
.header_nav_link {
  display: block;
  overflow: hidden;
}
.nav_text {
  position: relative;
}
/* 英語（初期位置） */
.nav_text .en {
  display: block;
  transform: translateY(0%);
  transition: transform 0.3s ease;
  font-family: var(--Asc);
  font-size: 1.7rem;
  line-height: calc(23 / 17);
}
.font_notosans {
  font-family: var(--NotoSans);
}
/* 日本語（初期位置：下に隠れている） */
.nav_text .ja {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
  font-family: var(--NotoSans);
  font-size: 1.2rem;
  line-height: calc(17 / 12);
}
/* hover時：英語が上へ、日本語が下から現れる */
.nav_item:hover .en {
  transform: translateY(100%);
}
.nav_item:hover .ja {
  transform: translateY(0%);
}
.sns_icon {
  width: 45%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 1.3rem 0 0;
}
.instagram_svg {
  height: 1.7rem;
}
.youtube_svg {
  height: 2.6rem;
}
.header_item.invert {
  color: #FFFFFF;
}
.header_item.invert .logo_svg {
  fill: #FFFFFF;
}
.header_item.invert .instagram_svg {
  fill: #FFFFFF;
}
.header_item.invert .youtube_svg {
  fill: #FFFFFF;
}
@media screen and (max-width:699.98px) {
  .header_container {
    width: 100vw;
    height: 7rem;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    z-index: 21;
  }
  /* footerの領域に入ったら、headerのz-indexを下げfooterの後ろに回り込ませる */
  .header_container.wrap {
    z-index: 10;
  }
  .site_title {
    margin-bottom: 0;
    position: relative;
    z-index: 22;
  }
  .header_nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 21;
    width: 37.5rem;
    height: 100vh;
    background-color: #CACACA;
  }
  .header_nav_list {
    align-items: center;
    gap: 2.4rem;
    margin-top: 12.6rem;
  }
  /* SP時はhoverアニメーションを無効化 */
  .nav_item:hover .en {
    transform: none;
    transition: unset;
  }
  .nav_text .ja {
    display: none;
  }
  .hamburger_btn {
    display: block;
    width: 4rem;
    height: 4rem;
    padding: 0 0.9rem;
    background: #002c5e;
    border: #000000 solid 0.1rem;
    cursor: pointer;
    position: relative;
    z-index: 22;
  }
  .hamburger_btn span {
    display: block;
    width: 2rem;
    height: 0.1rem;
    background: #FFFFFF;
    transition: all 0.3s ease-in-out;
    position: absolute;
    transition: 0.3s ease;
  }
  .hamburger_btn span:nth-child(1) {
    top: 1.5rem;
  }
  .hamburger_btn span:nth-child(2) {
    top: 2rem;
  }
  .hamburger_btn span:nth-child(3) {
    top: 2.5rem;
  }
  /* メニューオープン時（×に変形） */
  .hamburger_btn.active span:nth-child(1) {
    transform: rotate(25deg);
    top: 1.9rem;
  }
  .hamburger_btn.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger_btn.active span:nth-child(3) {
    transform: rotate(-25deg);
    top: 1.9rem;
  }
  .sns_icon {
    width: 16.5%;
    margin: 2.1rem auto 0;
  }
  .header_item.invert {
    color: #000000;
  }
  /* TOPのNEWSセクションでハンバーガーメニューを開いたときのみロゴは黒に */
  .header_item.invert.active .logo_svg {
    fill: #000000;
  }
  .header_item.invert .instagram_svg {
    fill: #000000;
  }
  .header_item.invert .youtube_svg {
    fill: #000000;
  }
}