/* Header — モック準拠
 * 仕様: TOPページ上部モック.png
 * - 左上にロゴ大、右側に半透明白オーバーレイで縦並びナビ
 * - KV通過後は白背景の compact header
 */

.site-header {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 50;
  pointer-events: none; /* 各子要素で pointer-events: auto */
}
.site-header[data-state="condensed"] {
  position: fixed;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
  pointer-events: auto;
}

/* Logo (左上) — 透過PNGロゴを直接KVへ配置（白パネル廃止、白ドロップシャドウで浮かす） */
.site-header__logo-wrap {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: auto;
  z-index: 2;
  padding: clamp(24px, 3vw, 56px) 0 0 clamp(24px, 3vw, 56px);
}
/* Item A: keep logo visible on ALL pages (incl. condensed = KV scrolled off or no-KV pages).
   In condensed state, place logo inline on the left of the compact header bar. */
.site-header[data-state="condensed"] .site-header__logo-wrap {
  position: static;
  padding: 10px clamp(20px, 2.4vw, 36px);
  display: inline-block;
  float: left;
  z-index: auto;
}
.site-logo {
  display: inline-block;
}
.site-logo img {
  /* #16-18: モック実寸に固定（可変させない）。デスクトップ 270px 固定 */
  width: 270px;
  max-width: none;
  height: auto;
  filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.85)) drop-shadow(0 2px 6px rgba(255, 255, 255, 0.6));
  transition: filter var(--t-base), width var(--t-base);
}
.site-header[data-state="condensed"] .site-logo img {
  /* Item A: compact size in condensed header, no white drop-shadow (white bg) */
  width: 155px;
  filter: none;
}

/* 右側 半透明白オーバーレイ */
.site-header__overlay {
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(180px, 18vw, 260px);
  /* [2026-09] min-height(clamp(360px,50vh,540px))を撤去。上下paddingの値自体は
     元から同じだったが、min-heightでボックスが強制的に高くされ、
     flex-direction:column + 上詰め(justify-content未指定=flex-start)の結果、
     余った分がすべて下側に溜まって「下の余白だけ大きい」ように見えていた。
     min-heightを外し、コンテンツ+paddingだけで高さを決めることで、
     見た目の上下余白を実際に揃える(ABOUT/GUIDE/JOURNAL含む全ページ共通)。 */
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(2px);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: clamp(24px, 3vw, 40px) clamp(20px, 2.6vw, 36px);
  gap: clamp(20px, 2.6vw, 36px);
  pointer-events: auto;
  z-index: 1;
}
.site-header[data-state="condensed"] .site-header__overlay {
  position: static;
  width: auto;
  min-height: 0;
  background: transparent;
  backdrop-filter: none;
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: clamp(20px, 2.4vw, 36px);
  padding: 12px clamp(24px, 3vw, 48px);
  float: right;
}

/* SIGN IN / REGISTER — S2: Inter Regular (align with .site-nav__link canonical, Item 1 pattern) */
.site-signin {
  font-family: var(--f-header-gothic);
  font-weight: 400;
  font-size: clamp(13px, 1.4vw, 18px);   /* 仕様: D18 / M13 */
  line-height: 1.4;
  color: var(--c-text);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--t-base);
  text-align: right;
  white-space: nowrap; /* S2b: prevent wrap after Inter font change (Inter wider than Cormorant) */
}
.site-signin:hover { color: var(--c-red); text-decoration-color: var(--c-red); }

/* グローバルナビ — 縦並び */
.site-nav__list {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: clamp(14px, 1.6vw, 22px);
  text-align: right;
}
.site-header[data-state="condensed"] .site-nav__list {
  flex-direction: row;
  gap: clamp(20px, 2.4vw, 36px);
}
.site-nav__link {
  /* 基本設計1P: ヘッダーグローバルナビ ゴシック体 英文字 Inter (Regular=400) */
  font-family: var(--f-header-gothic);
  font-weight: 400;
  font-size: clamp(13px, 1.1vw, 14px);    /* 仕様: D14 / M13 */
  line-height: clamp(15px, 1.2vw, 16px);  /* 仕様: D16 / M15 */
  color: var(--c-text);
  letter-spacing: 0.04em;
  transition: color var(--t-base);
}
.site-nav__link:hover { color: var(--c-red); }

/* condensed 時はナビが小さくなる */
.site-header[data-state="condensed"] .site-nav__link {
  font-size: clamp(12px, 1.1vw, 14px);
  font-family: var(--f-header-gothic);
  font-weight: 400;
  letter-spacing: 0.06em;
}
.site-header[data-state="condensed"] .site-nav__link br { display: none; }
.site-header[data-state="condensed"] .site-nav__link::before {
  content: attr(data-condensed);
}

/* Language switcher */
.lang-switch { position: relative; }
.lang-switch__button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--c-navy);
  color: var(--c-white);
  font-family: var(--f-en-serif);
  font-weight: 500;
  font-size: clamp(13px, 1.4vw, 18px);
  line-height: 1;
}
.lang-switch__button .arrow { font-size: 0.7em; transition: transform var(--t-base); }
.lang-switch[aria-expanded="true"] .lang-switch__button .arrow { transform: rotate(180deg); }
.lang-switch__menu {
  position: absolute;
  top: 100%;
  left: 0;                /* #10: JP(紺帯)と同じ幅・左基準に合わせる */
  right: 0;
  background: var(--c-white);
  color: var(--c-navy);
  font-family: var(--f-en-serif);
  font-weight: 500;       /* #10: JPと同じウェイト */
  font-size: clamp(13px, 1.4vw, 18px);
  line-height: 1;
  padding: 6px 14px;      /* #10: JP(button)と同じpadding → JP/ENの左端が縦に揃う */
  text-align: left;       /* #10: 左寄せ */
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base), visibility var(--t-base);
}
.lang-switch[aria-expanded="true"] .lang-switch__menu {
  opacity: 1;
  visibility: visible;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  /* WCAG 2.1 AA Success Criterion 2.5.5 Target Size (Enhanced): 44x44 min tap target.
     Inner content stays 20x20 (44 - 12*2 padding = 20) so visual icon is unchanged. */
  width: 44px;
  height: 44px;
  padding: 12px;
  background: transparent;
  border: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  z-index: 60;
  pointer-events: auto;
  position: absolute;
  top: clamp(20px, 2vw, 30px);
  right: clamp(20px, 2.6vw, 36px);
  color: var(--c-text);
}
.hamburger__bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--t-base), opacity var(--t-base);
}

/* Mobile header states (per user spec + mockup):
   - initial (KV visible): PC-style overlay nav visible, hamburger hidden
   - condensed (KV scrolled off): overlay nav hidden, hamburger visible on white overlay
     (the condensed white background is already applied by the base rule at line 15) */
@media (max-width: 768px) {
  /* Dead-zone fix: pin site-header to viewport so overlay + logo stay
     anchored during KV transition. Base rule uses position: absolute
     which causes header (incl. overlay-based nav) to scroll off top
     before condensed state kicks in — user perceives menu "disappears".
     Fixed keeps initial-state overlay accessible until threshold. */
  .site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; }
  .site-header__logo-wrap { top: 0; left: 0; padding: 20px 0 0 20px; }
  .site-logo img { width: 155px; max-width: none; }

  /* Round 2 44×44 fix: keep hamburger in viewport during KV transition.
     position: fixed detaches hamburger from header layout so it stays at
     viewport top-right at ALL scroll positions once displayed. */
  .hamburger { position: fixed; }

  /* State 1: KV-visible — PC-style overlay nav shown, hamburger hidden */
  .site-header[data-state="initial"] .site-header__overlay { display: flex; }
  .site-header[data-state="initial"] .hamburger { display: none; }

  /* State 2: KV scrolled off — hamburger visible on white overlay backing */
  .site-header[data-state="condensed"] { min-height: 60px; }
  .site-header[data-state="condensed"] .site-header__overlay { display: none; }
  .site-header[data-state="condensed"] .hamburger { display: inline-flex; }
  .site-header[data-state="condensed"] .site-header__logo-wrap { padding: 12px 16px; }
  .site-header[data-state="condensed"] .site-logo img { width: 120px; }

  /* User spec: white overlay only behind hamburger (square), not full header */
  .site-header[data-state="condensed"] {
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
  }
  .site-header[data-state="condensed"] .hamburger {
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(8px);
    border-radius: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  }
}

/* Desktop: hide hamburger in condensed state (only mobile shows hamburger) */
@media (min-width: 769px) {
  .site-header[data-state="condensed"] .hamburger { display: none; }
}

/* Hamburger menu overlay (mobile only) */
.hamburger-menu {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base), visibility var(--t-base);
}
.hamburger-menu[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}
.hamburger-menu__list {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 40px);
  text-align: center;
}
.hamburger-menu__list a {
  display: inline-block;
  padding: 8px 16px;
  font-family: var(--f-en-serif);
  font-weight: 500;
  font-size: clamp(22px, 4vw, 36px);
  color: var(--c-navy);
  letter-spacing: 0.04em;
  transition: color var(--t-base);
}
.hamburger-menu__list a:hover { color: var(--c-red); }

/* #88: 左上 × close button */
.hamburger-menu__close {
  position: absolute;
  top: clamp(18px, 4vw, 28px);
  left: clamp(18px, 5vw, 32px);
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--c-navy);
  line-height: 1;
  font-size: 40px;
  transition: color var(--t-base);
}
.hamburger-menu__close:hover { color: var(--c-red); }

/* Hamburger animation when open */
body.is-menu-open .hamburger__bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
body.is-menu-open .hamburger__bar:nth-child(2) { opacity: 0; }
body.is-menu-open .hamburger__bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
body.is-menu-open { overflow: hidden; }