/**
 * ヘッダー & フルスクリーンメニュー（共通）
 * 見た目の微調整は基本的にこのファイルだけを触ってください。
 */

/* ---- ヘッダーバー ---- */
#main-header.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background-color: var(--color-white);
  padding-block: 1.25rem;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, padding-block 0.3s ease;
}

#main-header.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  padding-block: 0.75rem;
}

.site-header__inner {
  max-width: var(--site-max);
  margin: 0 auto;
  padding-inline: var(--site-pad-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.site-header__logo-img {
  display: block;
  height: 3.2rem;
  width: auto;
}

.site-header__logo-text {
  font-family: var(--font-ja);
  font-size: 0.75rem;
  font-weight: var(--font-ja-weight);
  color: var(--color-navy);
  letter-spacing: -0.05em;
  white-space: nowrap;
}

@media (min-width: 768px) {
  .site-header__logo-text {
    font-size: 0.875rem;
    --font-ja-weight: 700;
  }
}

/* メニュー展開中：ロゴを隠し、ヘッダー背景を透明に */
#main-header.menu-active {
  background-color: transparent !important;
  box-shadow: none !important;
}

#main-header.menu-active #header-logo {
  opacity: 0;
  pointer-events: none;
}

/* ---- ハンバーガーボタン ---- */
#menu-toggle.menu-toggle {
  position: relative;
  z-index: 10;
  width: 2.75rem;
  height: 2.5rem;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 0;
  background: transparent;
}

#menu-toggle .hamburger-bar-1,
#menu-toggle .hamburger-bar-2 {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2.5rem;   /* 横幅 */
  height: 1px;     /* 太さ */
  background-color: var(--color-navy);
  transition: transform 0.3s ease, background-color 0.3s ease;
}

#menu-toggle .hamburger-bar-1 {
  transform: translate(-50%, calc(-50% - 3px));
}

#menu-toggle .hamburger-bar-2 {
  transform: translate(-50%, calc(-50% + 3px));
}

#menu-toggle.menu-open .hamburger-bar-1 {
  transform: translate(-50%, -50%) rotate(22deg);
  background-color: #fff;
}

#menu-toggle.menu-open .hamburger-bar-2 {
  transform: translate(-50%, -50%) rotate(-22deg);
  background-color: #fff;
}

/* ---- フルスクリーンメニュー ---- */
#fullscreen-menu.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background-color: var(--color-navy);
  opacity: 0;
  transition: opacity 0.5s ease;
}

#fullscreen-menu.menu-visible {
  opacity: 1;
}

.fullscreen-menu__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.menu-bg-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.15);
  transition: opacity 1.6s ease;
}

.menu-bg-slide.is-active {
  opacity: 1;
  animation: menu-bg-zoom-out 8s linear forwards;
}

.menu-bg-slide.is-leaving {
  transform: scale(1);
}

@keyframes menu-bg-zoom-out {
  from { transform: scale(1.15); }
  to   { transform: scale(1); }
}

.fullscreen-menu__bg-overlay {
  position: absolute;
  inset: 0;
  background-color: color-mix(in srgb, var(--color-navy) 85%, transparent);
}

.fullscreen-menu__scroll {
  position: relative;
  height: 100%;
  overflow-y: auto;
}

.fullscreen-menu__inner {
  max-width: var(--site-max);
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (min-width: 768px) {
  .fullscreen-menu__inner {
    padding-inline: 2.5rem;
  }
}

.fullscreen-menu__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 1024px) {
  .fullscreen-menu__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 4rem;
  }
}

.fullscreen-menu__brand-logo {
  display: block;
  width: 10rem;
  height: auto;
  margin-bottom: 2rem;
}

@media (min-width: 640px) {
  .fullscreen-menu__brand-logo {
    width: 12rem;
  }
}

.fullscreen-menu__brand-name {
  font-family: var(--font-mincho);
  font-size: 1.125rem;
  color: #fff;
  margin: 0 0 2rem;
}

.fullscreen-menu__sns {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.fullscreen-menu__sns-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #fff;
  text-decoration: none;
  transition: color 0.2s;
}

.fullscreen-menu__sns-link:hover {
  color: rgba(255, 255, 255, 0.5);
}

.fullscreen-menu__sns-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.fullscreen-menu__sns-icon svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

.fullscreen-menu__sns-label {
  font-family: var(--font-serif);
  font-size: 0.875rem;
}

.fullscreen-menu__nav-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 2rem;
  row-gap: 3rem;
}

@media (min-width: 768px) {
  .fullscreen-menu__nav-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.fullscreen-menu__nav-en {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: #fff;
  letter-spacing: 0.05em;
  margin: 0;
  font-variation-settings: "opsz" 10, "wght" 400;
}

.fullscreen-menu__nav-ja {
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.6);
  margin: 0 0 0.75rem;
}

.fullscreen-menu__nav-rule {
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin: 0 0 1rem;
}

.fullscreen-menu__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
}

.fullscreen-menu__nav-list a {
  color: rgba(255, 255, 255, 1);
  text-decoration: none;
  transition: color 0.2s;
}

.fullscreen-menu__nav-list a:hover {
  color: rgba(255, 255, 255, 0.5);
}

/* 組合員メニュー（専用・最後尾） */
.fullscreen-menu__nav-grid .nav-group--members {
  padding: 1rem 1.1rem 1.15rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.06);
}

.fullscreen-menu__nav-grid .nav-group--members .fullscreen-menu__nav-en {
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.fullscreen-menu__nav-grid .nav-group--members .fullscreen-menu__nav-ja {
  margin-bottom: 0.4rem;
}

.nav-group__badge {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.45);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.4;
}

.fullscreen-menu__nav-grid .nav-group--members .fullscreen-menu__nav-rule {
  border-top-color: rgba(255, 255, 255, 0.35);
}

.fullscreen-menu__copy {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.fullscreen-menu__copy p {
  margin: 0;
  font-size: 0.625rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* PC互換：アコーディオン用マークアップを従来見た目に揃える */
.menu-nav-item__head {
  appearance: none;
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: default;
  pointer-events: none;
}

.menu-nav-item__titles {
  display: contents;
}

.menu-nav-item__icon {
  display: none;
}

.fullscreen-menu__sns--foot {
  display: none;
}

/* メニュー内のスタッガー表示 */
.menu-stagger-item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

#fullscreen-menu.menu-visible .menu-stagger-item {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   SPメニュー（〜767px）のみ。PCは上記＝前回コミット相当を維持。
   ========================================================= */
@media (max-width: 767px) {
  .menu-bg-slide.is-active {
    animation-duration: 4s;
  }

  #main-header.menu-active #header-logo {
    opacity: 1;
    pointer-events: auto;
  }

  #main-header.menu-active .site-header__logo-text {
    color: #fff;
  }

  /* スクロール領域をヘッダー下から開始し、ロゴ／閉じるに被らないようにする */
  .fullscreen-menu__scroll {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    height: auto;
  }

  .fullscreen-menu__inner {
    padding: 0.5rem 1.35rem 5rem;
    justify-content: flex-start;
  }

  .fullscreen-menu__grid {
    gap: 0;
    flex: 1;
  }

  .fullscreen-menu__brand {
    display: none;
  }

  .fullscreen-menu__nav-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .menu-nav-item {
    padding: 0;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
    background: transparent;
  }

  .fullscreen-menu__nav-grid .nav-group--members {
    padding: 0;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
    background: transparent;
  }

  .fullscreen-menu__nav-grid .nav-group--members .menu-nav-item__titles,
  .fullscreen-menu__nav-grid .nav-group--members .fullscreen-menu__nav-ja {
    margin-bottom: 0;
  }

  .menu-nav-item__head {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.05rem 0;
    cursor: pointer;
    pointer-events: auto;
  }

  .menu-nav-item.is-open .menu-nav-item__head {
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  }

  .menu-nav-item__titles {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.55rem 0.85rem;
    flex: 1;
    min-width: 0;
  }

  .fullscreen-menu__nav-en {
    font-size: clamp(1rem, 4vw, 1.65rem);
    letter-spacing: 0.04em;
    line-height: 1.15;
    font-weight: 400;
  }

  .fullscreen-menu__nav-ja {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.92);
    margin: 0;
    letter-spacing: 0.04em;
  }

  .menu-nav-item__icon {
    position: relative;
    display: block;
    flex-shrink: 0;
    width: 1rem;
    height: 1rem;
    margin-left: auto;
  }

  .menu-nav-item__icon::before,
  .menu-nav-item__icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    background: #fff;
    transform: translate(-50%, -50%);
  }

  .menu-nav-item__icon::before {
    width: 100%;
    height: 1px;
  }

  .menu-nav-item__icon::after {
    width: 1px;
    height: 100%;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .menu-nav-item.is-open .menu-nav-item__icon::after {
    transform: translate(-50%, -50%) scaleY(0);
    opacity: 0;
  }

  .fullscreen-menu__nav-rule,
  .nav-group__badge {
    display: none;
  }

  .menu-nav-item__panel {
    display: none;
    padding: 0;
  }

  .menu-nav-item.is-open .menu-nav-item__panel {
    display: block;
    padding: 1rem 0 2.5rem;
  }

  .fullscreen-menu__nav-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1.5rem;
    row-gap: 0.95rem;
    padding: 0;
    font-size: 0.8125rem;
    font-family: var(--font-ja);
    letter-spacing: 0.02em;
  }

  .fullscreen-menu__nav-list li {
    min-width: 0;
  }

  .fullscreen-menu__nav-list a {
    color: rgba(255, 255, 255, 0.92);
    line-height: 1.45;
  }

  .fullscreen-menu__foot {
    display: block;
    margin-top: auto;
    padding-top: 1.75rem;
  }

  .fullscreen-menu__sns--foot {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1.25rem;
    row-gap: 0.85rem;
    align-items: center;
  }

  .fullscreen-menu__sns--foot .fullscreen-menu__sns-icon {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 0.4rem;
  }

  .fullscreen-menu__sns--foot .fullscreen-menu__sns-icon svg {
    width: 0.9rem;
    height: 0.9rem;
  }

  .fullscreen-menu__sns--foot .fullscreen-menu__sns-label {
    font-size: 0.8125rem;
  }

  .fullscreen-menu__copy {
    margin-top: 1.5rem;
    padding-top: 0;
    border-top: 0;
    text-align: center;
  }

  .fullscreen-menu__copy p {
    font-family: var(--font-serif);
    font-size: 0.5625rem;
    letter-spacing: 0.04em;
    text-transform: none;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.55);
  }
}