/* Header Layout */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: rgba(11, 20, 38, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201, 169, 97, 0.2);
  transition: background-color var(--transition-base);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-gold);
  color: var(--color-bg-secondary);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  z-index: calc(var(--z-fixed) + 10);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

/* Logo */
.site-logo {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.9;
}

.logo-accent {
  color: var(--color-gold);
}

/* Navigation */
.primary-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-gold);
}

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

.nav-cta {
  background-color: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background-color: var(--color-gold);
  color: var(--color-bg-secondary);
  box-shadow: var(--shadow-gold);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid var(--color-neutral-700);
  border-radius: var(--radius-md);
  cursor: pointer;
  gap: 6px;
  transition: border-color var(--transition-base);
}

.mobile-menu-toggle:hover {
  border-color: var(--color-gold);
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* Mobile Styles */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
    z-index: calc(var(--z-fixed) + 5);
  }
  
  .primary-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(11, 20, 38, 0.98);
    backdrop-filter: blur(20px);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-slow);
    padding: var(--space-8) var(--space-6);
    border-top: 1px solid rgba(201, 169, 97, 0.2);
  }
  
  .primary-nav.is-open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    height: calc(100vh - 80px);
  }
  
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
    width: 100%;
  }
  
  .nav-link {
    font-size: var(--text-lg);
    padding: var(--space-3) 0;
  }
  
  .mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .nav-cta {
    margin-top: var(--space-4);
    display: inline-flex;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .primary-nav {
    transition: none;
  }
  
  .hamburger-line {
    transition: none;
  }
}