/* Header (scoped) */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: linear-gradient(0deg, rgba(26, 58, 92, 0.96), rgba(26, 58, 92, 0.96));
  backdrop-filter: saturate(120%) blur(6px);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-lg);
}

.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-top: var(--spacing-3);
  padding-bottom: var(--spacing-3);
}

/* Brand */
.site-header .brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-3);
  color: var(--color-text-inverse);
}

.site-header .brand-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-gold);
}

.site-header .brand-name {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  color: #fff;
}

/* Navigation */
.primary-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-1);
  color: #e6edf5;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base) var(--transition-ease), transform var(--transition-fast) var(--transition-ease);
}

.nav-link:hover {
  color: var(--color-secondary);
  transform: translateY(-1px);
}

.nav-cta .btn {
  color: var(--color-primary-dark);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(230, 198, 90, 0.5);
  color: #fff;
}

.nav-toggle:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-gold);
}

.nav-toggle-box {
  position: relative;
  width: 22px;
  height: 16px;
}

.nav-toggle-bar {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: #fff;
  border-radius: var(--radius-full);
  transition: transform var(--transition-base) var(--transition-luxury), opacity var(--transition-base) var(--transition-ease);
}

.nav-toggle-bar:nth-child(1) { top: 0; }
.nav-toggle-bar:nth-child(2) { top: 7px; }
.nav-toggle-bar:nth-child(3) { bottom: 0; }

/* Toggle animation when expanded */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Responsive behavior */
@media (max-width: 992px) {
  .nav-toggle { display: inline-flex; }
  .nav-list { gap: var(--spacing-4); }
}

@media (max-width: 768px) {
  /* Progressive enhancement: menu visible by default; hide only when JS is enabled */
  .js-enabled .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
  }

  .js-enabled .primary-nav .nav-list {
    display: grid;
    grid-template-columns: 1fr;
    padding: var(--spacing-4) var(--container-padding);
    gap: var(--spacing-3);
  }

  .js-enabled .primary-nav:not(.is-open) { display: none; }
  .js-enabled .primary-nav.is-open { display: block; }

  .nav-link { padding: var(--spacing-3) 0; }
}

/* High contrast support */
@media (prefers-contrast: high) {
  .nav-link { text-decoration: underline; }
}