/* ============================================================
   GAJYUKU — 新グローバルナビゲーション CSS
   ファイル名: css/gajyuku-nav.css
   ============================================================ */

/* ---- リセット（新ナビスコープのみ） ---- */
.gh *, .gh *::before, .gh *::after,
.gn *, .gn *::before, .gn *::after { box-sizing: border-box; margin: 0; padding: 0; }
.gh a, .gn a { color: inherit; text-decoration: none; }
.gh ul, .gn ul { list-style: none; }
.gh button, .gn button { font: inherit; cursor: pointer; border: none; background: none; }

:root {
  --gaj-orange:        #ff6a00;
  --gaj-orange-hover:  #e05900;
  --gaj-orange-tint:   rgba(255,106,0,0.06);
  --gaj-orange-border: rgba(255,106,0,0.15);
  --gaj-black:         #111;
  --gaj-gray-dark:     #444;
  --gaj-gray-mid:      #888;
  --gaj-gray-light:    #e8e8e8;
  --gaj-white:         #fff;
  --gaj-sub-bg:        #fafafa;
  --gaj-font:          -apple-system,BlinkMacSystemFont,"SF Pro Text","Noto Sans JP","ヒラギノ角ゴ ProN W3",sans-serif;
  --gaj-gh-h-pc:       72px;
  --gaj-gh-h-sp:       60px;
  --gaj-gn-h:          44px;
  --gaj-ease:          cubic-bezier(0.25,0,0.1,1);
  --gaj-dur:           140ms;
  --gaj-dur-drawer:    320ms;
}

/* ===== HEADER ===== */
.gh {
  position: fixed; inset: 0 0 auto 0; z-index: 9000;
  height: var(--gaj-gh-h-sp);
  font-family: var(--gaj-font);
  background: rgba(255,255,255,0.93);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--gaj-gray-light);
  transition: box-shadow var(--gaj-dur);
}
.gh.is-scrolled { box-shadow: 0 1px 20px rgba(0,0,0,0.07); }

.gh__inner {
  max-width: 1320px; margin: 0 auto; padding: 0 20px;
  height: 100%; display: flex; align-items: center; gap: 12px;
}

/* ---- Logo ---- */
.gh__logo { display: flex; align-items: center; flex-shrink: 0; }
.gh__logo-img { height: 36px; width: auto; transition: opacity var(--gaj-dur); }
.gh__logo:hover .gh__logo-img { opacity: 0.8; }

/* ---- Right ---- */
.gh__right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

/* ---- Sub nav（PC専用） ---- */
.gh__sub-nav { display: none; align-items: center; }
.gh__sub-link {
  display: block; padding: 4px 10px; font-size: 11px;
  color: var(--gaj-gray-dark); letter-spacing: .04em;
  position: relative; transition: color var(--gaj-dur); white-space: nowrap;
}
.gh__sub-link::after {
  content: ''; position: absolute; left: 10px; right: 10px; bottom: -1px;
  height: 1px; background: var(--gaj-orange);
  transform: scaleX(0); transition: transform var(--gaj-dur) var(--gaj-ease); transform-origin: left;
}
.gh__sub-link:hover { color: var(--gaj-orange); }
.gh__sub-link:hover::after { transform: scaleX(1); }
.gh__sub-sep { display: block; width: 1px; height: 12px; background: var(--gaj-gray-light); }

/* ---- EN/JP ---- */
.gh__lang-toggle {
  display: none; align-items: center; gap: 3px;
  margin-left: 16px; padding: 4px 8px;
  font-size: 11px; letter-spacing: .08em; color: var(--gaj-gray-mid);
  border: 1px solid var(--gaj-gray-light); border-radius: 4px;
  transition: color var(--gaj-dur), border-color var(--gaj-dur); cursor: pointer;
}
.gh__lang-toggle:hover { color: var(--gaj-orange); border-color: var(--gaj-orange-border); }
.gh__lang-opt { transition: color var(--gaj-dur); }
.gh__lang-opt.is-active { color: var(--gaj-orange); font-weight: 500; }
.gh__lang-sep { color: var(--gaj-gray-light); }

/* ---- Instagram ---- */
.gh__instagram {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  transition: background var(--gaj-dur);
}
.gh__instagram:hover { background: rgba(188,24,136,0.07); }

/* ---- CTA（PC） ---- */
.gh__cta {
  display: none; align-items: center; padding: 0 18px; height: 34px;
  background: var(--gaj-orange); color: #fff !important;
  font-size: 12px; font-weight: 500; letter-spacing: .07em; border-radius: 17px;
  white-space: nowrap;
  transition: background var(--gaj-dur), letter-spacing var(--gaj-dur), transform var(--gaj-dur);
}
.gh__cta:hover { background: var(--gaj-orange-hover); letter-spacing: .10em; transform: scale(1.02); }

/* ---- ハンバーガー ---- */
.gh__toggle {
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 36px; height: 36px; padding: 9px 8px; border-radius: 6px;
  transition: background var(--gaj-dur);
}
.gh__toggle:hover { background: var(--gaj-orange-tint); }
.gh__toggle-bar {
  display: block; width: 100%; height: 1.5px; background: var(--gaj-black);
  border-radius: 1px;
  transition: transform .32s cubic-bezier(.4,0,.2,1), opacity var(--gaj-dur);
  transform-origin: center;
}
.gh__toggle[aria-expanded="true"] .gh__toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.gh__toggle[aria-expanded="true"] .gh__toggle-bar:nth-child(2) { opacity: 0; transform: scaleX(.2); }
.gh__toggle[aria-expanded="true"] .gh__toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ===== GLOBAL NAV ===== */
.gn { position: fixed; z-index: 8999; font-family: var(--gaj-font); }

/* ---- ドロップダウン共通 ---- */
.gn__sub {
  position: absolute; top: 100%; left: 0; min-width: 220px;
  background: #fff; border: 1px solid var(--gaj-gray-light);
  border-top: 2px solid var(--gaj-orange); border-radius: 0 0 8px 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.07); padding: 8px 0;
  opacity: 0; visibility: hidden; transform: translateY(-4px); pointer-events: none;
  transition: opacity var(--gaj-dur) var(--gaj-ease), transform var(--gaj-dur) var(--gaj-ease), visibility var(--gaj-dur);
}
.gn__item:hover .gn__sub, .gn__item:focus-within .gn__sub {
  opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto;
}
.gn__sub li a {
  display: block; padding: 9px 20px; font-size: 12.5px;
  color: var(--gaj-gray-dark) !important;
  letter-spacing: .04em;
  transition: color var(--gaj-dur), padding-left var(--gaj-dur) var(--gaj-ease);
}
.gn__sub li a:hover { color: var(--gaj-orange) !important; padding-left: 26px; }
.gn__sub-cta { color: var(--gaj-orange) !important; font-weight: 500; }
.gn__sub-group {
  display: block; padding: 10px 20px 4px; font-size: 9.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--gaj-gray-mid);
  border-top: 1px solid var(--gaj-gray-light); margin-top: 4px;
}
li.gn__sub-group:first-child { border-top: none; margin-top: 0; }

/* ---- 2カラム ---- */
.gn__sub--2col { display: grid !important; grid-template-columns: 1fr 1fr; min-width: 320px; }
.gn__sub--2col .gn__sub-group--full,
.gn__sub--2col li:empty { grid-column: 1 / -1; }
.gn__sub-group--full {
  display: block; padding: 10px 20px 4px; font-size: 9.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--gaj-gray-mid);
  border-top: 1px solid var(--gaj-gray-light); margin-top: 4px;
}
.gn__sub-group--full:first-child { border-top: none; margin-top: 0; }
.gn__sub--2col li a { padding: 8px 16px; }
.gn__sub--2col li a:hover { padding-left: 20px; }

/* ===== PC (960px以上) ===== */
@media (min-width: 960px) {
  .gh { height: var(--gaj-gh-h-pc); }
  .gh__sub-nav { display: flex; }
  .gh__cta { display: flex; }
  .gh__toggle { display: none; }
  .gh__lang-toggle { display: flex; }

  .gn {
    inset: var(--gaj-gh-h-pc) 0 auto 0;
    height: var(--gaj-gn-h);
    background: rgba(255,255,255,0.98);
    border-bottom: 1px solid var(--gaj-gray-light);
  }
  .gn__backdrop, .gn__panel-header, .gn__panel-footer, .gn__close { display: none; }
  .gn__panel { max-width: 1320px; margin: 0 auto; padding: 0 20px; height: 100%; display: flex; align-items: stretch; }
  .gn__list { display: flex; align-items: stretch; height: 100%; }
  .gn__item { position: relative; }
  .gn__item-row { display: flex; align-items: stretch; height: 100%; }
  .gn__link {
    display: flex; align-items: center; padding: 0 14px;
    font-size: 12.5px; letter-spacing: .05em;
    color: var(--gaj-black) !important;
    height: 100%; position: relative; transition: color var(--gaj-dur); white-space: nowrap;
  }
  .gn__link::after {
    content: ''; position: absolute; bottom: 0; left: 14px; right: 14px;
    height: 1.5px; background: var(--gaj-orange);
    transform: scaleX(0); transform-origin: left; transition: transform var(--gaj-dur) var(--gaj-ease);
  }
  .gn__item:hover .gn__link, .gn__item:focus-within .gn__link { color: var(--gaj-orange) !important; }
  .gn__item:hover .gn__link::after, .gn__item:focus-within .gn__link::after { transform: scaleX(1); }
  .gn__toggle-sub { display: none; }
}

/* ===== SP (959px以下) ===== */
@media (max-width: 959px) {
  .gh__toggle { display: flex !important; }
  .gh__cta { display: none !important; }
  .gh__sub-nav { display: none !important; }
  .gh__lang-toggle { display: none !important; }

  .gn {
    inset: 0; height: auto; background: transparent;
    visibility: hidden; pointer-events: none;
    transition: visibility var(--gaj-dur-drawer);
  }
  .gn.is-open { visibility: visible; pointer-events: auto; }

  .gn__backdrop {
    display: block; position: absolute; inset: 0;
    background: rgba(17,17,17,0.4);
    backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
    opacity: 0; transition: opacity var(--gaj-dur-drawer) cubic-bezier(.4,0,.2,1);
  }
  .gn.is-open .gn__backdrop { opacity: 1; }

  .gn__panel {
    position: absolute; inset: 0 0 0 auto;
    width: min(340px, 90vw); background: #fff;
    display: flex; flex-direction: column;
    overflow-y: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch;
    transform: translateX(100%);
    transition: transform var(--gaj-dur-drawer) cubic-bezier(.4,0,.2,1);
    max-width: none; margin: 0; padding: 0; height: auto;
  }
  .gn.is-open .gn__panel { transform: translateX(0); }

  .gn__panel-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 20px; height: var(--gaj-gh-h-sp);
    border-bottom: 1px solid var(--gaj-gray-light); flex-shrink: 0;
  }
  .gn__panel-logo { font-size: 16px; font-weight: 500; letter-spacing: .06em; color: var(--gaj-black); }
  .gn__close {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; color: var(--gaj-gray-dark); border-radius: 6px;
    transition: background var(--gaj-dur), color var(--gaj-dur);
  }
  .gn__close:hover { background: var(--gaj-orange-tint); color: var(--gaj-orange); }

  .gn__list { flex: 1; overflow-y: auto; padding: 8px 0 16px; display: block; height: auto; }
  .gn__item { border-bottom: 1px solid var(--gaj-gray-light); position: static; }
  .gn__item-row { display: flex; align-items: center; height: auto; }
  .gn__link {
    flex: 1; padding: 16px 20px; font-size: 14px; height: auto;
    color: var(--gaj-black) !important; transition: color var(--gaj-dur);
  }
  .gn__link::after { display: none; }
  .gn__item:hover .gn__link { color: var(--gaj-black) !important; }

  .gn__toggle-sub {
    display: flex; align-items: center; justify-content: center;
    width: 52px; height: 52px; color: var(--gaj-gray-mid);
    border-left: 1px solid var(--gaj-gray-light); flex-shrink: 0;
    transition: color var(--gaj-dur), background var(--gaj-dur);
  }
  .gn__toggle-sub:hover { background: var(--gaj-orange-tint); color: var(--gaj-orange); }
  .gn__chevron { transition: transform .24s cubic-bezier(.4,0,.2,1); }
  .gn__toggle-sub[aria-expanded="true"] .gn__chevron { transform: rotate(180deg); }

  .gn__sub {
    position: static; transform: none; opacity: 1; visibility: visible;
    border: none; border-top: 1px solid var(--gaj-gray-light);
    border-radius: 0; box-shadow: none; background: var(--gaj-sub-bg);
    max-height: 0; overflow: hidden; padding: 0; pointer-events: none; min-width: 0;
    transition: max-height var(--gaj-dur-drawer) cubic-bezier(.4,0,.2,1);
  }
  .gn__sub.is-open { max-height: 1000px; padding: 8px 0; pointer-events: auto; }
  .gn__sub li a {
    padding: 12px 20px 12px 34px; font-size: 13px;
    color: var(--gaj-gray-dark) !important;
    border-bottom: 1px solid rgba(0,0,0,.04);
  }
  .gn__sub li a:hover { padding-left: 38px; color: var(--gaj-orange) !important; }
  .gn__sub-group { padding: 10px 20px 4px 26px; }

  .gn__sub--2col { display: block !important; }
  .gn__sub--2col li:empty { display: none; }

  .gn__panel-footer {
    display: flex; flex-direction: column; gap: 8px;
    padding: 16px 20px; border-top: 1px solid var(--gaj-gray-light);
    background: #fff; position: sticky; bottom: 0; flex-shrink: 0;
  }
  .gn__panel-footer-cta {
    display: block; text-align: center; padding: 14px;
    background: var(--gaj-orange); color: #fff !important;
    font-size: 13px; font-weight: 500; letter-spacing: .07em; border-radius: 6px;
    transition: background var(--gaj-dur);
  }
  .gn__panel-footer-cta:hover { background: var(--gaj-orange-hover); }
  .gn__panel-footer-sub {
    display: block; text-align: center; padding: 10px;
    color: var(--gaj-gray-dark) !important; font-size: 12px; letter-spacing: .05em;
    border: 1px solid var(--gaj-gray-light); border-radius: 6px;
    transition: color var(--gaj-dur), border-color var(--gaj-dur);
  }
  .gn__panel-footer-sub:hover { color: var(--gaj-orange) !important; border-color: var(--gaj-orange-border); }
}