@charset "UTF-8";

/* ============================================================================
   Hamburger Menu Styles
   ============================================================================ */

.hamburger-menu-button {
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  z-index: calc(var(--z-fixed) + 3);
  -webkit-tap-highlight-color: transparent;
}

.hamburger-menu-button .line {
  position: absolute;
  width: 36px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;

  transition:
    transform var(--transition-base),
    opacity var(--transition-base),
    background-color var(--transition-base);
}

.hamburger-menu-button .line:nth-child(1) { transform: translateY(-6px); }
.hamburger-menu-button .line:nth-child(2) { transform: translateY(0); }
.hamburger-menu-button .line:nth-child(3) { transform: translateY(6px); }

.site-header.is-nav-open .hamburger-menu-button .line:nth-child(1) {
  transform: rotate(45deg);
}
.site-header.is-nav-open .hamburger-menu-button .line:nth-child(2) {
  opacity: 0;
}
.site-header.is-nav-open .hamburger-menu-button .line:nth-child(3) {
  transform: rotate(-45deg);
}

/* ============================================================================
   Navigation Overlay
   ============================================================================ */

.global-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  top: 64px;
  min-height: 100dvh;

  /* Safariでも確実に暗く見えるベース色 */
  /*
  background: rgba(0,0,0,0.78);
*/
background: rgba(0,0,0,0.40);
  /* Chrome系：SVGフロスト */
  backdrop-filter: url(#glass-filter);
  -webkit-backdrop-filter: url(#glass-filter);

  border-bottom: 1px solid rgba(255,255,255,0.15);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.1);

  opacity: 0;
  visibility: hidden;
  pointer-events: none;

  transition:
    opacity var(--transition-base),
    visibility var(--transition-base);

  z-index: calc(var(--z-fixed) + 1);

  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

body.is-nav-open .global-nav {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ============================================================================
   Scrollbar
   ============================================================================ */

.global-nav::-webkit-scrollbar { width: 8px; }
.global-nav::-webkit-scrollbar-track { background: rgba(26,26,26,0.8); }
.global-nav::-webkit-scrollbar-thumb {
  background: rgba(64,64,64,0.8);
  border-radius: 10px;
}
.global-nav::-webkit-scrollbar-thumb:hover {
  background: rgba(96,96,96,0.9);
}

.global-nav {
  scrollbar-width: thin;
  scrollbar-color: rgba(64,64,64,0.8) rgba(26,26,26,0.8);
}

/* ============================================================================
   Layout
   ============================================================================ */

.global-nav__list {
  min-height: 100%;
  margin: 0;
  padding: clamp(88px, 16vh, 120px) var(--space-6) 100px;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.global-nav__list a {
  display: block;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  text-decoration: none;
  line-height: 1.4;
  transition: color var(--transition-base);
}

.global-nav__list a.hover-gold:hover {
  color: var(--color-gold);
}

@media (min-width: 768px) {
  .global-nav__list {
    padding-left: var(--space-10);
    padding-right: var(--space-10);
    align-items: flex-end;
  }
}

@media (min-width: 1024px) {
  .hamburger-menu-button { display: flex; }
  .global-nav__list {
    flex-direction: column;
    padding-left: clamp(var(--space-10), 8vw, var(--space-12));
    padding-right: clamp(var(--space-10), 8vw, var(--space-12));
  }
}

/* ============================================================================
   Safari専用フォールバック（SVGが効かないため）
   ============================================================================ */

@supports (-webkit-backdrop-filter: blur(1px)) {
  .global-nav {
    backdrop-filter: blur(22px) saturate(180%) brightness(1.08) !important;
    -webkit-backdrop-filter: blur(22px) saturate(180%) brightness(1.08) !important;
  }
}

/* ===== Firefox フォールバック ===== */
[data-browser="firefox"] .global-nav {
  backdrop-filter: blur(22px) saturate(180%) brightness(1.08);
  -webkit-backdrop-filter: blur(22px) saturate(180%) brightness(1.08);
}