/* Site navigation */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: var(--color-bg-hero);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.site-nav--scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

/* Transparent nav for hero pages -- opt in via data-nav-transparent on body */
.site-nav--transparent {
  background-color: transparent;
}

.site-nav--transparent.site-nav--scrolled {
  background-color: var(--color-bg-hero);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding-inline: var(--space-8);
}

/* Logo / brand */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-on-dark);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand__crest {
  width: 40px;
  height: 40px;
}

.nav-brand__logo {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-brand__text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav-brand__sub {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  opacity: 0.8;
  letter-spacing: 0.05em;
}

/* Desktop nav links */
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

@media (min-width: 960px) {
  .nav-links {
    display: flex;
  }
}

@media (min-width: 960px) and (max-width: 1100px) {
  .nav-links {
    gap: var(--space-4);
  }
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-on-dark);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background-color: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav-link:hover::after,
.nav-link--active::after {
  transform: scaleX(1);
}

.nav-link:hover {
  color: var(--color-gold-on-dark);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-on-dark);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-dropdown__toggle::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background-color: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav-dropdown__toggle:hover::after,
.nav-dropdown--open .nav-dropdown__toggle::after,
.nav-dropdown__toggle.nav-link--active::after {
  transform: scaleX(1);
}

.nav-dropdown__toggle:hover {
  color: var(--color-gold-on-dark);
}

.nav-dropdown__chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.nav-dropdown--open .nav-dropdown__chevron {
  transform: rotate(180deg);
}

.nav-dropdown:last-of-type .nav-dropdown__menu {
  left: auto;
  right: 0;
}

.nav-dropdown__menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background-color: var(--color-bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3) 0;
  z-index: var(--z-dropdown);
  animation: slideDown 0.2s ease;
}

.nav-dropdown--open .nav-dropdown__menu {
  display: block;
}

.nav-dropdown__link {
  display: block;
  padding: var(--space-3) var(--space-5);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-dropdown__link:hover {
  background-color: var(--color-sx-blue-light);
  color: var(--color-sx-blue);
}

/* Hamburger button */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-1);
  width: 44px;
  height: 44px;
  padding: var(--space-3);
  cursor: pointer;
}

@media (min-width: 960px) {
  .nav-hamburger {
    display: none;
  }
}

.nav-hamburger__line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-on-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-hamburger--open .nav-hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger--open .nav-hamburger__line:nth-child(2) {
  opacity: 0;
}

.nav-hamburger--open .nav-hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: 72px;
  background-color: var(--color-bg-hero);
  z-index: var(--z-overlay);
  padding: var(--space-8) var(--space-6);
  overflow-y: auto;
  height: calc(100vh - 72px);
  height: calc(100dvh - 72px);
}

.nav-overlay--open {
  display: block;
  animation: fadeIn 0.2s ease;
}

.nav-overlay__link {
  display: block;
  padding: var(--space-4) 0;
  color: var(--color-text-on-dark);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.nav-overlay__link:hover {
  color: var(--color-gold-on-dark);
}

.nav-overlay__link--header {
  cursor: default;
}

.nav-overlay__link--header:hover {
  color: var(--color-text-on-dark);
}

.nav-overlay__sub {
  padding-left: var(--space-6);
}

.nav-overlay__sub-link {
  display: block;
  padding: var(--space-2) 0;
  color: rgba(240, 242, 245, 0.7);
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 400;
  transition: color var(--transition-fast);
}

.nav-overlay__sub-link:hover {
  color: var(--color-gold-on-dark);
}

/* Spacer to push content below fixed nav */
.nav-spacer {
  height: 72px;
}