.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--background-color);
  height: 90px;
  opacity: 1;
  transition: opacity 0.4s ease;
}

.header--faded {
  opacity: 0.3;
}

.header--faded:hover {
  opacity: 1;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--side-padding);
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header__logo-img {
  width: 167px;
  height: auto;
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 2.4px;
  color: var(--main-color);
}

/* SP専用: ヘッダー内に直接表示する募集要項ボタン */
.header__sp-entry {
  display: none;
  padding: 5px 12px;
  font-size: 15px;
  line-height: var(--short-height);
  letter-spacing: 0.75px;
  white-space: nowrap;
}

/* Nav */
.header__nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
}

.header__nav-item {
  position: relative;
}

.header__nav-link {
  font-family: var(--afont);
  font-size: 16px;
  line-height: var(--long-height);
  letter-spacing: 0.8px;
  color: var(--main-color);
  white-space: nowrap;
}

.header__nav-link:hover {
  opacity: 0.7;
}

/* PC: SP専用ナビ項目を非表示 */
.header__nav-item--sp-only {
  display: none;
}

/* PC: Toggle button・SP専用要素を非表示 */
.header__nav-toggle {
  display: none;
}

.header__nav-subpanel-top {
  display: none;
}

.header__nav-corporate {
  display: none;
}

.header__nav-sublist li a i {
  display: none;
}

/* PC: Dropdown (subpanel) */
.header__nav-subpanel {
  position: absolute;
  top: 200%;
  left: 0;
  background: var(--background-color);
  padding: 16px 24px;
  min-width: 200px;
  list-style: none;
  z-index: 200;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

/* ギャップ橋渡し: top:200% で生まれる隙間をカバーしドロップダウンが閉じないようにする */
.header__nav-item--hasDropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 100%;
}

.header__nav-item--hasDropdown:hover .header__nav-subpanel,
.header__nav-item--hasDropdown:focus-within .header__nav-subpanel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.header__nav-sublist {
  list-style: none;
  padding: 0;
}

.header__nav-sublist li a {
  font-family: var(--afont);
  font-size: 14px;
  line-height: 2.5;
  color: var(--main-color);
  white-space: nowrap;
  display: block;
}

.header__nav-sublist li a:hover {
  opacity: 0.7;
}

/* Buttons */
.header__buttons {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header__buttons .btn {
  padding: 4px 24px;
  white-space: nowrap;
}

/* Hamburger */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--main-color);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.header.is-open .header__hamburger span:nth-child(1) {
  transform: translateY(8.25px) rotate(45deg);
}

.header.is-open .header__hamburger span:nth-child(2) {
  opacity: 0;
}

.header.is-open .header__hamburger span:nth-child(3) {
  transform: translateY(-8.25px) rotate(-45deg);
}

/* ===== TABLET (768-991px): ハンバーガー表示 ===== */
@media (max-width: 991px) {
  .header__hamburger {
    display: flex;
  }

  .header__nav {
    display: none;
    position: fixed;
    top: 90px;
    left: 0;
    width: 100%;
    height: calc(100vh - 90px);
    background: var(--background-color);
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    padding: 24px var(--side-padding);
    gap: 0;
    z-index: 99;
  }

  .header.is-open .header__nav {
    display: flex;
  }

  .header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  /* SP専用項目を表示 */
  .header__nav-item--sp-only {
    display: block;
  }

  /* PC用ホバー橋渡しをSPで無効化（コーポレートサイトリンクへのクリック阻害を解消） */
  .header__nav-item--hasDropdown::after {
    display: none;
  }

  .header__nav-item {
    border-bottom: 1px solid rgba(40, 58, 107, 0.1);
  }

  /* link-wrap: ラベル + シェブロンを横並びに */
  .header__nav-link-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
  }

  .header__nav-link {
    display: block;
    padding: 0;
    line-height: var(--short-height);
    flex: 1;
    font-size: 15px;
    letter-spacing: 0.75px;
  }

  /* シェブロントグルボタン */
  .header__nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
  }

  .header__nav-chevron {
    color: var(--main-color);
    font-size: 14px;
    transition: transform 0.3s ease;
  }

  .header__nav-item--hasDropdown.is-active .header__nav-chevron {
    transform: rotate(90deg);
  }

  /* タブレット/SP: subpanel をアコーディオンに変更 */
  .header__nav-subpanel {
    position: static;
    transform: none;
    background: var(--accent-highlight);
    box-shadow: none;
    padding: 10px 0;
    min-width: unset;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: none;
    display: none;
  }

  .header__nav-item--hasDropdown:hover .header__nav-subpanel {
    display: none;
  }

  .header__nav-item--hasDropdown.is-active .header__nav-subpanel {
    display: block;
  }

  /* subpanel内: ページTOPリンク行 */
  .header__nav-subpanel-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 8px 8px 20px;
    border-bottom: 1px solid rgba(40, 58, 107, 0.15);
    margin-bottom: 2px;
  }

  .header__nav-subpanel-top a {
    font-family: var(--afont);
    font-size: 15px;
    line-height: var(--short-height);
    color: var(--font-color);
    letter-spacing: 0.75px;
    text-decoration: none;
    flex: 1;
  }

  .header__nav-subpanel-top .fa-arrow-right {
    font-size: 13px;
    color: var(--font-color);
    flex-shrink: 0;
  }

  /* subpanel内: セクションリンク（インデント） */
  .header__nav-sublist {
    padding: 0;
  }

  .header__nav-sublist li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 8px 8px 40px;
    font-size: 15px;
    line-height: var(--short-height);
    color: var(--font-color);
    letter-spacing: 0.75px;
    white-space: nowrap;
  }

  .header__nav-sublist li a i {
    display: inline-block;
    font-size: 13px;
    color: var(--font-color);
    flex-shrink: 0;
  }

  /* SP: コーポレートサイトリンク */
  .header__nav-corporate {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    font-family: var(--afont);
    font-size: 15px;
    line-height: var(--short-height);
    color: var(--font-color);
    letter-spacing: 0.75px;
    text-decoration: none;
  }

  /* SP: ハンバーガーメニュー内のエントリーボタンを非表示 */
  .header__buttons {
    display: none;
  }
}

/* ===== Entry panel (PC + SP共通) ===== */
.header__entry-panel {
  display: none; /* tablet (768-991px) では非表示 */
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--background-color);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.header.is-entry-open .header__entry-panel {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.header__entry-panel-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  border-radius: 4px;
  font-family: var(--afont);
  font-size: 15px;
  line-height: var(--short-height);
  letter-spacing: 0.75px;
  white-space: nowrap;
}

.header__entry-panel-btn--dark {
  background: linear-gradient(to right, var(--background-color) 50%, var(--main-color) 50%);
  background-size: 200% 100%;
  background-position: 100% center;
  color: var(--background-color);
  border: 1px solid var(--background-color);
  transition: background-position 0.6s var(--ease-spring), color 0.4s ease-out, border-color 0.4s ease-out;
}

.header__entry-panel-btn--dark:hover {
  background-position: 0% center;
  color: var(--main-color);
  border-color: var(--main-color);
}

.header__entry-panel-btn--light {
  background: linear-gradient(to right, var(--main-color) 50%, var(--background-color) 50%);
  background-size: 200% 100%;
  background-position: 100% center;
  border: 1px solid var(--main-color);
  color: var(--main-color);
  transition: background-position 0.6s var(--ease-spring), color 0.4s ease-out;
}

.header__entry-panel-btn--light:hover {
  background-position: 0% center;
  color: var(--background-color);
}

/* PC (≥992px): 横並び・新卒中途ボタンを非表示 */
@media (min-width: 992px) {
  .header__entry-panel {
    display: block;
    padding: 24px var(--side-padding);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  }

  .header__entry-panel-inner {
    display: flex;
    flex-direction: row;
    gap: 16px;
    max-width: var(--content-width);
    margin: 0 auto;
  }

  .header__entry-panel-btn {
    flex: 1;
  }

  .header__btn-entry-sub {
    display: none;
  }
}

/* メニュー開時スクロール抑制 */
html.menu-open {
  overflow: hidden;
}

/* ===== SP (≤767px): ヘッダー高さ80px ===== */
@media (max-width: 767px) {
  .header {
    height: 80px;
  }

  .header__nav {
    top: 80px;
    height: calc(100vh - 80px);
  }

  .header__logo-img {
    width: 87px;
  }

  .header__logo-text {
    font-size: 12px;
    letter-spacing: 1.44px;
  }

  .header__logo {
    gap: 12px;
  }

  /* SP: ヘッダー内の募集要項ボタンを表示 */
  .header__sp-entry {
    display: inline-flex;
  }

  /* SP: ナビ内の募集要項を非表示（ヘッダーで表示済み） */
  .header__nav-entry {
    display: none;
  }

  /* SP: エントリーパネル */
  .header__entry-panel {
    display: block;
    padding: 32px 22px 24px;
  }

  .header__entry-panel-inner {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }
}

/* ===== @supports: 100dvh (iOS Safari URLバー対応) ===== */
@supports (height: 100dvh) {
  @media (max-width: 991px) {
    .header__nav {
      height: calc(100dvh - 90px);
    }
  }

  @media (max-width: 767px) {
    .header__nav {
      height: calc(100dvh - 80px);
    }
  }
}