/* === Global Navigation Bar === */
.gnb {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(17, 17, 17, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background var(--duration) var(--ease);
}

.gnb-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand */
.gnb-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.gnb-logo {
  height: 24px;
  width: auto;
}

.gnb-brand-text {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 18px;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

/* Nav Links */
.gnb-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.gnb-link {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--duration) var(--ease);
  position: relative;
}

.gnb-link:hover,
.gnb-link.active {
  color: var(--color-white);
}

.gnb-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* Right area */
.gnb-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Family Site Switcher */
.family-switcher {
  position: relative;
}

.family-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}

.family-trigger:hover {
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--color-white);
}

.family-trigger svg {
  width: 12px;
  height: 12px;
  transition: transform var(--duration) var(--ease);
}

.family-switcher.open .family-trigger svg {
  transform: rotate(180deg);
}

.family-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 260px;
  background: var(--color-gray-900);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--duration) var(--ease);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.family-switcher.open .family-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.family-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 6px;
  transition: background var(--duration) var(--ease);
}

.family-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.family-item.current {
  background: rgba(255, 255, 255, 0.04);
}

.family-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 12px;
  color: var(--color-white);
  flex-shrink: 0;
}

.family-item-icon.hub    { background: var(--color-gray-700); }
.family-item-icon.green  { background: var(--color-green); }
.family-item-icon.orange { background: var(--color-orange); }

.family-item-text {
  display: flex;
  flex-direction: column;
}

.family-item-name {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-white);
}

.family-item-desc {
  font-size: 11px;
  color: var(--color-gray-400);
}

/* CTA */
.gnb-cta {
  padding: 8px 20px;
  font-size: 13px;
}

/* Hamburger */
.gnb-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.gnb-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 1px;
  transition: all var(--duration) var(--ease);
}

.gnb-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.gnb-hamburger.open span:nth-child(2) { opacity: 0; }
.gnb-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.gnb-mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(17, 17, 17, 0.98);
  padding: 32px 24px;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.gnb-mobile-menu.open {
  display: flex;
}

.gnb-mobile-link {
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color var(--duration) var(--ease);
}

.gnb-mobile-link:hover,
.gnb-mobile-link.active {
  color: var(--color-white);
}

.gnb-mobile-family {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.gnb-mobile-family-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: 12px;
}

/* === Responsive === */
@media (max-width: 768px) {
  .gnb-nav,
  .gnb-right .family-switcher,
  .gnb-right .gnb-cta {
    display: none;
  }

  .gnb-hamburger {
    display: flex;
  }
}

/* Spacer to push content below fixed GNB */
.gnb-spacer {
  height: 64px;
}