/* ============================================
   MOBILE NAVIGATION ENHANCEMENTS
   ============================================ */

/* Enhanced Hamburger Menu */
.greedy-nav__toggle {
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: transform 0.3s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.greedy-nav__toggle:hover {
  transform: scale(1.1);
}

.greedy-nav__toggle:active {
  transform: scale(0.95);
}

/* Animated Hamburger Icon */
.navicon {
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--masthead-link-color);
  transition: background 0.3s ease;
  margin: 0 auto;
  top: 50%;
  transform: translateY(-50%);
}

.navicon::before,
.navicon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--masthead-link-color);
  transition: all 0.3s ease;
}

.navicon::before {
  top: -8px;
}

.navicon::after {
  top: 8px;
}

/* X Animation when menu is open */
.greedy-nav__toggle.close .navicon {
  background: transparent;
}

.greedy-nav__toggle.close .navicon::before {
  transform: rotate(45deg);
  top: 0;
}

.greedy-nav__toggle.close .navicon::after {
  transform: rotate(-45deg);
  top: 0;
}

/* Dark mode colors */
.dark-mode .navicon,
.dark-mode .navicon::before,
.dark-mode .navicon::after {
  background: var(--masthead-link-color);
}

/* Enhanced Hidden Links (Dropdown Menu) */
.hidden-links {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 15px;
  background: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding: 8px 0;
  min-width: 200px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  overscroll-behavior: contain;
  z-index: 999;
  
  /* Animation */
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.hidden-links.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Smooth scrollbar for long menus */
.hidden-links::-webkit-scrollbar {
  width: 6px;
}

.hidden-links::-webkit-scrollbar-track {
  background: transparent;
}

.hidden-links::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
}

.dark-mode .hidden-links::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
}

/* Menu Items */
.hidden-links li {
  margin: 0;
  list-style: none;
}

.hidden-links a {
  display: block;
  padding: 12px 20px;
  color: var(--text-color);
  text-decoration: none;
  font-size: 16px;
  transition: background 0.2s ease, color 0.2s ease;
  position: relative;
}

.hidden-links a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary-color);
  transform: scaleY(0);
  transition: transform 0.2s ease;
}

.hidden-links a:hover,
.hidden-links a:focus {
  background: var(--code-background-color);
  color: var(--primary-color);
}

.hidden-links a:hover::before,
.hidden-links a:focus::before {
  transform: scaleY(1);
}

/* Touch feedback */
.hidden-links a:active {
  background: var(--border-color);
}

/* Backdrop for mobile menu */
.nav-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav-backdrop.show {
  display: block;
  opacity: 1;
}

/* Mobile-specific improvements */
@media (max-width: 768px) {
  /* Full-width dropdown on mobile */
  .hidden-links {
    right: 10px;
    left: 10px;
    width: auto;
    min-width: unset;
    margin-top: 10px;
  }
  
  /* Larger touch targets */
  .hidden-links a {
    padding: 16px 20px;
    font-size: 18px;
  }
  
  /* Prevent body scroll when menu is open */
  body.nav-open {
    overflow: hidden;
  }
  
  /* Adjust menu position if needed */
  .greedy-nav {
    position: relative;
  }
  
  /* Hide MVP badge on very small screens */
  @media (max-width: 480px) {
    .site-mvp-badge .mvp-badge-text {
      display: none;
    }
    
    .site-mvp-badge::after {
      content: 'MVP';
      font-size: 12px;
    }
  }
}

/* Tablet improvements */
@media (min-width: 769px) and (max-width: 1024px) {
  .hidden-links {
    min-width: 240px;
  }
}

/* Accessibility improvements */
.greedy-nav__toggle:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 4px;
}

.hidden-links a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: -2px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .greedy-nav__toggle,
  .navicon,
  .navicon::before,
  .navicon::after,
  .hidden-links,
  .hidden-links a,
  .nav-backdrop {
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .hidden-links {
    border: 2px solid currentColor;
  }
  
  .hidden-links a {
    border-bottom: 1px solid currentColor;
  }
}

/* Print styles */
@media print {
  .greedy-nav__toggle,
  .hidden-links,
  .nav-backdrop {
    display: none !important;
  }
}

/* Animation for menu items (stagger effect) */
.hidden-links.show li {
  animation: slideInUp 0.3s ease forwards;
  opacity: 0;
}

.hidden-links.show li:nth-child(1) { animation-delay: 0.05s; }
.hidden-links.show li:nth-child(2) { animation-delay: 0.1s; }
.hidden-links.show li:nth-child(3) { animation-delay: 0.15s; }
.hidden-links.show li:nth-child(4) { animation-delay: 0.2s; }
.hidden-links.show li:nth-child(5) { animation-delay: 0.25s; }
.hidden-links.show li:nth-child(6) { animation-delay: 0.3s; }
.hidden-links.show li:nth-child(7) { animation-delay: 0.35s; }
.hidden-links.show li:nth-child(8) { animation-delay: 0.4s; }

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Disable animations if reduced motion is preferred */
@media (prefers-reduced-motion: reduce) {
  .hidden-links.show li {
    animation: none;
    opacity: 1;
  }
}

/* Swipe gesture indicator (optional) */
.hidden-links::before {
  content: '';
  display: block;
  width: 40px;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  margin: 8px auto 12px;
  opacity: 0.5;
}

@media (min-width: 769px) {
  .hidden-links::before {
    display: none;
  }
}

/* Focus trap for keyboard navigation */
.hidden-links a:first-child:focus,
.hidden-links a:last-child:focus {
  position: relative;
  z-index: 1;
}

/* Smooth transitions between visible and hidden states */
.greedy-nav .visible-links {
  transition: opacity 0.3s ease;
}

.greedy-nav__toggle.hidden {
  opacity: 0;
  pointer-events: none;
}

.greedy-nav__toggle:not(.hidden) {
  opacity: 1;
  pointer-events: auto;
}