.topnav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-h);
  backdrop-filter: blur(12px);
  background: rgba(247, 242, 234, 0.86);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.topnav.has-drawer-open {
  z-index: 1001;
}

.theme-tech .topnav {
  background: rgba(18, 16, 20, 0.9);
}

.topnav.is-scrolled {
  border-bottom-color: rgba(166, 28, 32, 0.12);
  background: rgba(247, 242, 234, 0.95);
}

.theme-tech .topnav.is-scrolled {
  border-bottom-color: rgba(196, 163, 90, 0.22);
  background: rgba(18, 16, 20, 0.96);
}

.theme-tech .nav-links a {
  color: rgba(243, 236, 228, 0.72);
}

.theme-tech .nav-links a:hover,
.theme-tech .nav-links a.is-active {
  color: var(--gold);
}

.theme-tech .nav-links a.is-active::after {
  background: var(--gold);
}

.theme-tech .mobile-drawer {
  background: rgba(18, 16, 20, 0.98);
}

.theme-tech .mobile-drawer a {
  color: #f3ece4;
  border-bottom-color: rgba(196, 163, 90, 0.15);
}

.topnav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 2.75rem;
}

.brand-logo {
  width: 2.2rem;
  height: 2.2rem;
  object-fit: contain;
}

.brand-text {
  font-size: 1.15rem;
  color: var(--brand);
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem 0.85rem;
  max-width: 58rem;
}

.nav-links a {
  position: relative;
  font-size: 0.86rem;
  color: var(--ink-soft);
  padding: 0.35rem 0;
  transition: color 0.25s var(--ease);
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--brand);
}

.nav-links a.is-active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--brand);
  transform-origin: left;
  animation: lineGrow 0.45s var(--ease) both;
}

.menu-toggle {
  position: relative;
  z-index: 1002;
  width: 2.75rem;
  height: 2.75rem;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
}

.menu-toggle span {
  width: 1.35rem;
  height: 1.5px;
  background: var(--brand);
  transition: transform 0.3s var(--ease);
}

.mobile-drawer {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 1001;
  background: rgba(247, 242, 234, 0.98);
  backdrop-filter: blur(16px);
  padding: 1.5rem 1.25rem 2rem;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.mobile-drawer a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  border-bottom: 1px solid rgba(166, 28, 32, 0.1);
  font-size: 1.05rem;
  color: var(--ink);
}

.mobile-drawer a:hover {
  color: var(--brand);
}

.nav-groups {
  display: flex;
  align-items: stretch;
  gap: 0.35rem 1.1rem;
  height: 100%;
}

.nav-group {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}

.nav-group-title {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.75rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
  transition: color 0.25s var(--ease);
}

.nav-chevron {
  width: 0.4rem;
  height: 0.4rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-0.1rem);
  opacity: 0.55;
  transition: transform 0.3s var(--ease), opacity 0.25s var(--ease);
}

.nav-group:hover .nav-group-title,
.nav-group.is-current .nav-group-title,
.nav-group.is-open .nav-group-title {
  color: var(--brand);
}

.nav-group:hover .nav-chevron,
.nav-group.is-open .nav-chevron {
  opacity: 1;
  transform: rotate(225deg) translateY(-0.05rem);
}

.nav-dropdown {
  position: absolute;
  top: calc(100% - 0.1rem);
  left: 50%;
  transform: translateX(-50%) translateY(0.55rem) scale(0.98);
  min-width: 13.5rem;
  padding: 0.85rem 0.75rem 0.9rem;
  background: var(--paper);
  border: 1px solid rgba(166, 28, 32, 0.12);
  border-radius: 0.2rem;
  box-shadow: 0 1.1rem 2.4rem rgba(26, 21, 18, 0.12);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s;
  z-index: 50;
}

.nav-dropdown::before {
  content: '';
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.nav-dropdown.is-wide {
  min-width: 22rem;
  left: 50%;
}

.nav-group:hover .nav-dropdown,
.nav-group.is-open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.nav-drop-section + .nav-drop-section {
  margin-top: 0.7rem;
  padding-top: 0.7rem;
  border-top: 1px solid rgba(166, 28, 32, 0.1);
}

.nav-drop-label {
  margin: 0 0.35rem 0.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: none;
}

.nav-drop-list.is-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.1rem 0.35rem;
}

.nav-drop-item {
  --i: 0;
  position: relative;
  display: flex;
  align-items: center;
  min-height: 2.35rem;
  padding: 0 0.85rem 0 1.05rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
  white-space: nowrap;
  border-radius: 0.12rem;
  opacity: 0;
  transform: translateY(0.35rem);
  transition: color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.nav-group:hover .nav-drop-item,
.nav-group.is-open .nav-drop-item {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(var(--i) * 35ms);
}

.nav-drop-item::before {
  content: '';
  position: absolute;
  left: 0.25rem;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--brand);
  transform: translateY(-50%);
  transition: height 0.22s var(--ease);
}

.nav-drop-item:hover,
.nav-drop-item.is-active {
  color: var(--brand);
  background: var(--brand-soft);
  transform: translateX(0.15rem);
}

.nav-drop-item:hover::before,
.nav-drop-item.is-active::before {
  height: 1.05rem;
}

.nav-drop-item.deep {
  font-size: 0.84rem;
}

.stage-links {
  max-width: 70rem;
  justify-content: flex-end;
}

.mobile-group-title {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 2.9rem;
  border-bottom: 1px solid rgba(166, 28, 32, 0.1);
  color: var(--ink);
  font-size: 1.05rem;
}

.mobile-chevron {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 1.5px solid var(--brand);
  border-bottom: 1.5px solid var(--brand);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease);
}

.mobile-group.is-open .mobile-chevron {
  transform: rotate(225deg);
}

.mobile-group-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0 0 0 0.75rem;
  border-left: 2px solid transparent;
  transition: max-height 0.35s var(--ease), opacity 0.28s var(--ease), padding 0.28s var(--ease), border-color 0.28s;
}

.mobile-group.is-open .mobile-group-panel {
  max-height: 40rem;
  opacity: 1;
  padding: 0.35rem 0 0.85rem 0.85rem;
  border-left-color: rgba(166, 28, 32, 0.22);
}

.mobile-drop-label {
  margin: 0.55rem 0 0.2rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.mobile-group-panel a {
  font-size: 0.95rem;
  color: var(--ink-soft);
  border-bottom-color: rgba(166, 28, 32, 0.06);
}

.mobile-group-panel a.is-deep {
  font-size: 0.9rem;
  padding-left: 0.35rem;
}

.theme-tech .nav-group-title,
.theme-tech .nav-drop-item {
  color: rgba(243, 236, 228, 0.72);
}

.theme-tech .nav-group:hover .nav-group-title,
.theme-tech .nav-group.is-current .nav-group-title,
.theme-tech .nav-drop-item:hover,
.theme-tech .nav-drop-item.is-active {
  color: var(--gold);
}

.theme-tech .nav-dropdown {
  background: rgba(28, 25, 31, 0.98);
  border-color: var(--tech-line);
}

.theme-tech .nav-drop-item::before {
  background: var(--gold);
}

.theme-tech .nav-drop-item:hover,
.theme-tech .nav-drop-item.is-active {
  background: rgba(196, 163, 90, 0.1);
}

.theme-tech .nav-drop-section + .nav-drop-section {
  border-top-color: rgba(196, 163, 90, 0.18);
}

@media (max-width: 64rem) and (min-width: 48.0625rem) {
  .nav-links {
    gap: 0.1rem 0.55rem;
  }

  .nav-links a,
  .nav-group-title {
    font-size: 0.78rem;
  }

  .nav-groups {
    gap: 0.25rem 0.65rem;
  }

  .nav-dropdown.is-wide {
    min-width: 18rem;
  }
}