/**
 * モバイルナビゲーション
 * ハンバーガーメニュー・ドロワー・アコーディオン
 * 768px以下で有効
 */

/* ===== ハンバーガー → X アニメーション ===== */
.nav-hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.is-active span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== ドロワー (スライド + フェード) ===== */
.mobile-menu {
  display: flex;
  position: fixed;
  top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--navy);
  z-index: 999;
  flex-direction: column;
  padding: 36px 28px;
  gap: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s 0.35s;
}
.mobile-menu.open {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s 0s;
}

/* ===== メニューリンク ===== */
.mobile-menu a {
  text-decoration: none;
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  letter-spacing: 0.06em;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--gold); }
.mobile-menu a.active { color: var(--gold); }
.mobile-menu a.m-cta {
  color: var(--gold);
  margin-top: 20px;
  border: 1px solid var(--gold);
  text-align: center;
  padding: 14px;
}

/* ===== アコーディオン (データ サブメニュー) ===== */
.mobile-accordion {
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.mobile-accordion-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  font-family: inherit;
  letter-spacing: 0.06em;
  padding: 18px 0;
  cursor: pointer;
  transition: color 0.2s;
}
.mobile-accordion-toggle:hover { color: var(--gold); }
.mobile-accordion-arrow {
  font-size: 11px;
  transition: transform 0.3s ease;
  display: inline-block;
}
.mobile-accordion.is-open .mobile-accordion-arrow {
  transform: rotate(180deg);
}
.mobile-accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}
.mobile-accordion.is-open .mobile-accordion-panel {
  max-height: 800px;
}

/* ===== カテゴリ見出し ===== */
.mobile-cat {
  padding: 14px 0 6px 8px;
  font-size: 0.68rem;
  color: var(--gold-light, #c8b99a);
  letter-spacing: 0.1em;
  font-weight: 600;
}
.mobile-cat:not(:first-child) {
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 4px;
  padding-top: 14px;
}

/* ===== サブメニューリンク ===== */
.mobile-menu a.mobile-sub {
  display: block;
  padding: 12px 0 12px 24px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.mobile-menu a.mobile-sub:last-child {
  border-bottom: none;
  padding-bottom: 16px;
}
.mobile-menu a.mobile-sub:hover,
.mobile-menu a.mobile-sub.active {
  color: var(--gold, #9b8b6e);
}

/* ===== オーバーレイ背景 ===== */
.mobile-overlay {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 998;
  opacity: 0;
  transition: opacity 0.35s ease;
}
.mobile-overlay.active {
  display: block;
  opacity: 1;
}