.qt-header-age-banner {
  background: linear-gradient(90deg, #7f1d1d, #b91c1c);
  color: #fee2e2;
  font-size: var(--font-size-xs);
}

.qt-header-age-banner-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
}

.qt-header-age-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.1rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: #fee2e2;
  color: #7f1d1d;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.qt-header-age-text {
  margin: 0;
  color: #fee2e2;
}

.qt-header {
  position: sticky;
  top: 0;
  z-index: 40;
}

.site-logo-text {
  display: flex;
  flex-direction: column;
}

.site-logo-title {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.site-logo-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.qt-header-nav {
  display: flex;
  align-items: center;
}

.qt-header-nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.qt-header-nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.qt-header-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width var(--transition-normal);
}

.qt-header-nav-link:hover,
.qt-header-nav-link:focus-visible {
  color: var(--gray-50);
}

.qt-header-nav-link:hover::after,
.qt-header-nav-link:focus-visible::after {
  width: 100%;
}

.qt-header-nav-item--highlight .qt-header-nav-link {
  color: var(--gray-50);
}

.qt-header-nav-item--highlight .qt-header-nav-link::after {
  background: linear-gradient(90deg, var(--color-success), var(--color-primary));
}

.qt-header-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.55);
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.25), transparent 60%),
              rgba(15, 23, 42, 0.95);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.35rem;
  color: var(--gray-100);
}

.qt-header-toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-100);
  transition: transform var(--transition-fast), opacity var(--transition-fast), width var(--transition-fast);
}

.qt-header-toggle:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 3px;
}

.qt-header-toggle[aria-expanded="true"] .qt-header-toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.qt-header-toggle[aria-expanded="true"] .qt-header-toggle-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.qt-header-toggle[aria-expanded="true"] .qt-header-toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 768px) {
  .site-header-inner {
    gap: var(--space-3);
  }

  .qt-header-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: rgba(2, 6, 23, 0.98);
    border-bottom: 1px solid rgba(15, 23, 42, 0.9);
    transform-origin: top;
  }

  .qt-header-nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 var(--space-4) var(--space-4);
  }

  .qt-header-toggle {
    display: inline-flex;
  }

  .qt-header-nav {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .qt-header-nav.is-open {
    max-height: 18rem;
    opacity: 1;
    visibility: visible;
  }
}

@media (min-width: 769px) {
  .qt-header-nav {
    position: static;
  }
}