/* ============================================
   Global Navigation
   ============================================ */
.gnav {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  margin-top: 0;
}

.gnav__inner {
  width: 100%;
  max-width: 100%;
  padding: 0 20px;
}

.gnav__list {
  display: flex;
  align-items: stretch;
}

.gnav__item {
  flex: 1;
  position: relative;
  text-align: center;
}

.gnav__item + .gnav__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  bottom: 15px;
  width: 1px;
  background-color: var(--color-border);
}

.gnav__item:last-child::after {
  display: none;
}

.gnav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 8px;
  height: 100px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.gnav__link:hover {
  background-color: var(--color-primary-pale);
  opacity: 1;
}

.gnav__item--active .gnav__link {
  color: inherit;
}

.gnav__label-ja {
  font-size: 16px;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  white-space: nowrap;
}

.gnav__label-en {
  font-family: var(--font-english);
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 8px;
}

.gnav__indicator {
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
}

/* ============================================
   Mobile Navigation
   ============================================ */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-modal);
  pointer-events: none;
  visibility: hidden;
}

.mobile-nav.is-open {
  pointer-events: auto;
  visibility: visible;
}

.mobile-nav__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav.is-open .mobile-nav__overlay {
  opacity: 1;
}

.mobile-nav__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 360px;
  height: 100%;
  background-color: var(--color-white);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  padding: 24px;
}

.mobile-nav.is-open .mobile-nav__panel {
  transform: translateX(0);
}

.mobile-nav__close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-text);
}

.mobile-nav__list {
  margin-top: 60px;
}

.mobile-nav__item {
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.mobile-nav__label-ja {
  font-size: 16px;
  font-weight: var(--font-weight-bold);
}

.mobile-nav__label-en {
  font-family: var(--font-english);
  font-size: 12px;
  color: var(--color-primary);
  text-transform: uppercase;
}