/* Navigation System Styles */

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Menu Container */
.mobile-menu-container {
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-light);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
}

.mobile-menu-overlay.active .mobile-menu-container {
  transform: translateX(0);
}

/* Mobile Menu Header */
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

.mobile-menu-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mobile-menu-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Mobile Menu Navigation */
.mobile-menu-nav {
  flex: 1;
  padding: var(--space-lg) 0;
  overflow-y: auto;
}

.mobile-menu-link {
  display: block;
  padding: var(--space-md) var(--space-lg);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  position: relative;
}

.mobile-menu-link:hover {
  background: var(--bg-hover);
  color: var(--brand-primary);
  border-left-color: var(--brand-primary);
}

.mobile-menu-link.active {
  background: var(--brand-primary-alpha);
  color: var(--brand-primary);
  border-left-color: var(--brand-primary);
  font-weight: 600;
}

.mobile-menu-link.active::after {
  content: '';
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--brand-primary);
  border-radius: 50%;
}

/* Mobile Menu Footer */
.mobile-menu-footer {
  padding: var(--space-lg);
  border-top: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

.mobile-menu-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.mobile-theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-theme-toggle:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: white;
  transform: scale(1.05);
}

/* Body state when mobile menu is open */
body.mobile-menu-open {
  overflow: hidden;
}

/* Navigation Transitions */
.nav-link,
.mobile-nav-item {
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link.active,
.mobile-nav-item.active {
  color: var(--brand-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-primary);
  border-radius: 1px;
}

/* Clean URL transitions */
.page-transition {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.page-transition.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Loading states */
.nav-loading {
  position: relative;
  pointer-events: none;
}

.nav-loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(2px);
  border-radius: inherit;
}

/* Responsive Design */
@media (max-width: 768px) {
  .mobile-menu-container {
    width: 280px;
  }
  
  .mobile-menu-header {
    padding: var(--space-md);
  }
  
  .mobile-menu-title {
    font-size: 1.125rem;
  }
  
  .mobile-menu-link {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .mobile-menu-container {
    width: 100vw;
    max-width: 100vw;
  }
}

/* Dark theme support */
[data-theme="dark"] .mobile-menu-overlay {
  background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .mobile-menu-container {
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
  .mobile-menu-overlay,
  .mobile-menu-container,
  .mobile-menu-link,
  .nav-link,
  .mobile-nav-item {
    transition: none;
  }
}

/* Focus styles */
.mobile-menu-link:focus,
.mobile-menu-close:focus,
.mobile-theme-toggle:focus {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .mobile-menu-overlay {
    background: rgba(0, 0, 0, 0.9);
  }
  
  .mobile-menu-container {
    border-left: 2px solid var(--border-color);
  }
  
  .mobile-menu-link {
    border-left-width: 4px;
  }
}