/*
 * Modern Navigation Styles
 * Responsive, accessible, and clean design
 */

/* Header & Navigation Container */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-primary-olive);
  box-shadow: var(--shadow-md);
  transition: background-color var(--transition-base);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  z-index: var(--z-fixed);
}

.logo img {
  width: 150px;
  height: auto;
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base);
}

.logo img:hover {
  transform: scale(1.05);
}

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transform: translateY(-2px);
}

.nav-link.active {
  background-color: rgba(255, 255, 255, 0.2);
  font-weight: var(--font-weight-bold);
}

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

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  margin-top: var(--spacing-sm);
  list-style: none;
  padding: var(--spacing-sm);
  z-index: var(--z-dropdown);
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: var(--spacing-md);
  color: var(--color-primary-navy);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--color-cream);
  color: var(--color-lake-blue);
  padding-left: var(--spacing-lg);
}

.dropdown-icon {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.nav-item.has-dropdown:hover .dropdown-icon {
  transform: rotate(180deg);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: var(--z-fixed);
}

.menu-toggle span {
  width: 100%;
  height: 3px;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-11px) rotate(-45deg);
}

/* Responsive Design */
@media (max-width: 968px) {
  .menu-toggle {
    display: flex;
  }
  
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-primary-navy);
    padding: 80px var(--spacing-lg) var(--spacing-lg);
    transition: right var(--transition-base);
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    z-index: var(--z-fixed);
  }
  
  .main-nav.active {
    right: 0;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  
  .nav-link {
    width: 100%;
    padding: var(--spacing-lg);
    justify-content: space-between;
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background-color: rgba(255, 255, 255, 0.1);
    box-shadow: none;
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }
  
  .nav-item.has-dropdown.active .dropdown-menu {
    max-height: 500px;
  }
  
  .dropdown-menu a {
    color: var(--color-white);
    padding-left: var(--spacing-2xl);
  }
  
  .dropdown-menu a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    padding-left: calc(var(--spacing-2xl) + var(--spacing-sm));
  }
  
  .logo img {
    width: 120px;
  }
}

@media (max-width: 600px) {
  .logo img {
    width: 100px;
  }
  
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* Mobile Menu Overlay */
.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.menu-overlay.active {
  display: block;
  opacity: 1;
}

/* Skip to Content Link (Accessibility) */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-primary-navy);
  color: var(--color-white);
  padding: var(--spacing-md);
  text-decoration: none;
  z-index: 9999;
}

.skip-to-content:focus {
  top: 0;
}