/* ═══════════════════════════════════════════════
   MOBILE MENU REDESIGN — global.css 置き換え分
   既存の .menu-btn / .nav-overlay / .nav-menu を
   このコードに丸ごと差し替えてください
   ═══════════════════════════════════════════════ */

/* ── ハンバーガーボタン ── */
.menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    0 2px 12px rgba(54, 174, 222, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  transition:
    background 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.2s ease;
  flex-shrink: 0;
}

.menu-btn:hover {
  background: rgba(255, 255, 255, 0.75);
  box-shadow:
    0 4px 20px rgba(54, 174, 222, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

.menu-btn__bar {
  display: block;
  width: 20px;
  height: 1.5px;
  background: linear-gradient(90deg, #36aede, #85b5ff);
  border-radius: 2px;
  transition:
    transform 0.35s cubic-bezier(0.23, 1, 0.32, 1),
    opacity 0.25s ease,
    width 0.3s ease;
  transform-origin: center;
}

/* open 状態 */
.menu-btn.open .menu-btn__bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.menu-btn.open .menu-btn__bar:nth-child(2) {
  opacity: 0;
  width: 0;
}
.menu-btn.open .menu-btn__bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── オーバーレイ背景 ── */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(180, 210, 230, 0.18);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.nav-overlay.visible {
  display: block;
}
.nav-overlay.active {
  opacity: 1;
}

/* ── メニューパネル ── */
.nav-menu {
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(24px) saturate(1.6);
  -webkit-backdrop-filter: blur(24px) saturate(1.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 12px 48px rgba(54, 174, 222, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(-8px);
  transition: transform 0.35s cubic-bezier(0.23, 1, 0.32, 1);
  padding-left: 40px; /* カラーバー分 */
}

.nav-overlay.active .nav-menu {
  transform: translateY(0);
}

/* 左カラーバー */
.nav-menu__bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(
    180deg,
    #36aede 0%,
    #85b5ff 40%,
    #ff8ab3 80%,
    #ff6b9d 100%
  );
  border-radius: 0 2px 2px 0;
}

/* ── リスト ── */
.nav-menu__list {
  list-style: none;
  padding: 24px 0 20px;
  margin: 0;
  display: flex;
  flex-direction: column;
}

.nav-menu__item {
  opacity: 0;
  transform: translateX(-12px);
  transition:
    opacity 0.3s ease calc(var(--i) * 0.05s + 0.1s),
    transform 0.3s ease calc(var(--i) * 0.05s + 0.1s);
}

.nav-overlay.active .nav-menu__item {
  opacity: 1;
  transform: translateX(0);
}

.nav-menu__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 24px 16px 0;
  border-bottom: 1px solid rgba(54, 174, 222, 0.1);
  text-decoration: none;
  transition: background 0.2s ease, padding-left 0.2s ease;
}

.nav-menu__item:last-child .nav-menu__link {
  border-bottom: none;
}

.nav-menu__link:hover {
  background: rgba(54, 174, 222, 0.06);
  padding-left: 8px;
}

.nav-menu__en {
  font-family: "Barlow Condensed", "Noto Sans JP", sans-serif;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #36aede;
  line-height: 1;
  min-width: 160px;
}

.nav-menu__ja {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  line-height: 1;
}

/* ── フッター（ロゴ＋SNS） ── */
.nav-menu__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px 20px 0;
  border-top: 1px solid rgba(54, 174, 222, 0.1);
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.35s ease 0.5s,
    transform 0.35s ease 0.5s;
}

.nav-overlay.active .nav-menu__footer {
  opacity: 1;
  transform: translateY(0);
}

.nav-menu__logo {
  height: 32px;
  width: auto;
  display: block;
  mix-blend-mode: multiply;
}

.nav-menu__socials {
  display: flex;
  gap: 10px;
}

.nav-menu__social {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #36aede;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-menu__social:hover {
  opacity: 0.75;
  transform: scale(1.08);
}

.nav-menu__social img {
  width: 16px;
  height: 16px;
  filter: brightness(0) invert(1);
  display: block;
}



/* ── 閉じるボタン ── */
.nav-menu__close {
  position: fixed;
  top: 8px;
  right: 60px;
  width: 44px;
  height: 44px;
  background: rgba(54, 174, 222, 0.08);
  border: 1px solid rgba(54, 174, 222, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 300;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-menu__close:hover {
  background: rgba(54, 174, 222, 0.15);
  transform: rotate(90deg);
}

.nav-menu__close span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: #36aede;
  border-radius: 2px;
  position: absolute;
}

.nav-menu__close span:nth-child(1) {
  transform: rotate(45deg);
}
.nav-menu__close span:nth-child(2) {
  transform: rotate(-45deg);
}

/* open時にハンバーガーを非表示 */
.menu-btn.open {
  opacity: 0;
  pointer-events: none;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1024px) {
  .header-nav {
    display: none;
  }
  .menu-btn {
    display: flex;
  }
}

@media (max-width: 767px) {
	
	.nav-menu__close {
    top: 6px;
    right: 16px;
    width: 38px;
    height: 38px;
  }
	
  .header {
    padding: 0 16px;
  }
  .logo-img {
    height: 32px;
  }
  .nav-menu {
    top: 50px; /* SP ヘッダー高さ */
  }
  .menu-btn {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    gap: 4px;
  }
  .menu-btn__bar {
    width: 18px;
  }
  .nav-menu__en {
    font-size: 18px;
    min-width: 140px;
  }
  .nav-menu__ja {
    font-size: 11px;
  }
  .nav-menu__link {
    padding: 14px 20px 14px 0;
  }
}