/* ==========================================
   NAVIGATION - MODERN MULTI-LEVEL MENU
   Clean, Accessible, Responsive
   ========================================== */

/* ==========================================
   HEADER
   ========================================== */

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.header-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ==========================================
   LOGO
   ========================================== */

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: scale(1.02);
}

.logo-icon {
  font-size: var(--text-3xl);
}

.logo-text {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

/* ==========================================
   MAIN NAVIGATION
   ========================================== */

.nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-50);
}

/* ==========================================
   DROPDOWN MENU
   ========================================== */

.dropdown {
  position: relative;
}

.dropdown-toggle::after {
  content: '▾';
  margin-left: var(--space-1);
  font-size: var(--text-sm);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  padding: var(--space-2);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
}

.dropdown:hover .dropdown-menu,
.dropdown-menu:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--color-primary-50);
  color: var(--color-primary);
}

.dropdown-divider {
  height: 1px;
  margin: var(--space-2) 0;
  background-color: var(--border-primary);
}

/* ==========================================
   MOBILE MENU TOGGLE
   ========================================== */

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-base);
  color: var(--text-primary);
  font-size: var(--text-xl);
  cursor: pointer;
  transition: all var(--transition-base);
}

.menu-toggle:hover {
  background-color: var(--bg-secondary);
  border-color: var(--color-primary);
}

/* ==========================================
   BREADCRUMBS
   ========================================== */

.breadcrumbs {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
}

.breadcrumbs-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.breadcrumb-item {
  font-size: var(--text-sm);
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
}

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: var(--font-medium);
}

.breadcrumb-separator {
  color: var(--text-tertiary);
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
}

.footer-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6) var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-section h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-primary);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ==========================================
   RESPONSIVE - DESKTOP
   ========================================== */

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }

  .nav {
    display: block;
  }
}

/* ==========================================
   RESPONSIVE - MOBILE
   ========================================== */

@media (max-width: 767px) {
  .nav {
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    bottom: 0;
    padding: var(--space-6);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: var(--z-fixed);
  }

  .nav.active {
    display: block;
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .nav-link {
    width: 100%;
    justify-content: space-between;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin-top: var(--space-2);
    margin-left: var(--space-4);
  }

  .dropdown-toggle::after {
    content: '▸';
  }

  .dropdown.active .dropdown-toggle::after {
    content: '▾';
  }
}