/**
 * Magical Navigation System - Enhanced for Scroll-Free Experience
 * Part of LEGENDARY UI Design System v2.0
 * Built for Aria's Educational Games Platform
 */

:root {
  /* Navigation-specific tokens */
  --nav-height: 60px;
  --nav-z-index: 1100;
  --nav-background: rgba(255, 255, 255, 0.95);
  --nav-backdrop: blur(20px);
  --nav-border: rgba(102, 126, 234, 0.1);
  --nav-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ================================
   SCROLL-SAFE NAVIGATION CORE
   ================================ */

.nav-magical {
  position: sticky;
  top: 0;
  z-index: var(--nav-z-index);
  background: var(--nav-background);
  backdrop-filter: var(--nav-backdrop);
  border-bottom: 1px solid var(--nav-border);
  height: var(--nav-height);
  transition: var(--nav-transition);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-game, 1200px);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-gray-800);
  text-decoration: none;
  transition: var(--nav-transition);
}

.nav-brand:hover {
  color: var(--color-magical-purple);
  transform: scale(1.02);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ================================
   ENHANCED BREADCRUMB NAVIGATION
   ================================ */

.breadcrumb-magical {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-glass, rgba(255, 255, 255, 0.1));
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-4);
  
  /* Prevent navigation from causing scroll */
  position: sticky;
  top: calc(var(--nav-height) + var(--space-2));
  z-index: calc(var(--nav-z-index) - 10);
  
  /* Smooth entrance animation */
  animation: breadcrumbSlideIn 0.5s ease-out;
}

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

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  transition: var(--nav-transition);
  color: white;
  text-decoration: none;
  font-weight: var(--weight-medium);
  
  /* Ensure touch-friendly sizes */
  min-height: 44px;
  min-width: 44px;
  text-align: center;
}

.breadcrumb-item:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.breadcrumb-item.current {
  background: rgba(255, 255, 255, 0.3);
  font-weight: var(--weight-bold);
  cursor: default;
}

.breadcrumb-separator {
  color: rgba(255, 255, 255, 0.7);
  font-weight: var(--weight-bold);
  user-select: none;
}

/* Game-specific breadcrumb themes */
.breadcrumb-magical.theme-math {
  background: linear-gradient(45deg, #4ecdc4 0%, #44a08d 100%);
}

.breadcrumb-magical.theme-spell {
  background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
}

.breadcrumb-magical.theme-science {
  background: linear-gradient(45deg, #48bb78 0%, #68d391 100%);
}

.breadcrumb-magical.theme-art {
  background: linear-gradient(45deg, #ff6b6b 0%, #ffa500 100%);
}

/* ================================
   MAGICAL MENU SYSTEM
   ================================ */

.menu-magical {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  padding: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

.menu-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--bg-card, rgba(255, 255, 255, 0.95));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-magical-md, 0 8px 16px rgba(102, 126, 234, 0.2));
  transition: var(--transition-magical, all 0.3s cubic-bezier(0.4, 0, 0.2, 1));
  cursor: pointer;
  text-decoration: none;
  
  /* Ensure adequate touch targets for children */
  min-height: 120px;
  min-width: 120px;
  
  /* Prevent text selection for better UX */
  user-select: none;
}

.menu-item:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-magical-lg, 0 12px 24px rgba(102, 126, 234, 0.25));
}

.menu-item:active {
  transform: translateY(-2px) scale(1.01);
}

.menu-item-icon {
  font-size: 3rem;
  margin-bottom: var(--space-3);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-4px);
  }
}

.menu-item-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-gray-800);
  text-align: center;
  margin: 0;
}

.menu-item-description {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  text-align: center;
  margin-top: var(--space-2);
  margin-bottom: 0;
}

/* ================================
   PROGRESS NAVIGATION
   ================================ */

.progress-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-glass, rgba(255, 255, 255, 0.1));
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-6);
  
  /* Ensure it doesn't cause scrolling */
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.progress-step {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-gray-300);
  color: var(--color-gray-600);
  font-weight: var(--weight-bold);
  font-size: var(--text-sm);
  transition: var(--transition-magical, all 0.3s cubic-bezier(0.4, 0, 0.2, 1));
  cursor: pointer;
}

.progress-step.active {
  background: var(--gradient-magical, linear-gradient(135deg, #667eea 0%, #764ba2 100%));
  color: white;
  transform: scale(1.2);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.progress-step.completed {
  background: var(--color-success, #48bb78);
  color: white;
}

.progress-step:hover:not(.active) {
  background: var(--color-gray-400);
  transform: scale(1.1);
}

.progress-connector {
  width: 20px;
  height: 2px;
  background: var(--color-gray-300);
  transition: var(--transition-magical, all 0.3s cubic-bezier(0.4, 0, 0.2, 1));
}

.progress-connector.active {
  background: var(--gradient-magical, linear-gradient(135deg, #667eea 0%, #764ba2 100%));
}

/* ================================
   QUICK ACTION BAR
   ================================ */

.action-bar {
  position: fixed;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-glass, rgba(255, 255, 255, 0.1));
  backdrop-filter: blur(20px);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-magical-lg, 0 12px 24px rgba(102, 126, 234, 0.25));
  z-index: var(--z-docked, 10);
  
  /* Smooth entrance animation */
  animation: actionBarSlideUp 0.5s ease-out;
}

@keyframes actionBarSlideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-magical, linear-gradient(135deg, #667eea 0%, #764ba2 100%));
  color: white;
  border: none;
  cursor: pointer;
  transition: var(--transition-magical, all 0.3s cubic-bezier(0.4, 0, 0.2, 1));
  font-size: var(--text-xl);
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.action-btn:hover {
  transform: translateY(-2px) scale(1.1);
  box-shadow: var(--shadow-magical-xl, 0 20px 40px rgba(102, 126, 234, 0.3));
}

.action-btn:active {
  transform: translateY(0) scale(1.05);
}

.action-btn.primary {
  background: var(--gradient-magical, linear-gradient(135deg, #667eea 0%, #764ba2 100%));
}

.action-btn.success {
  background: var(--color-success, #48bb78);
}

.action-btn.warning {
  background: var(--color-warning, #ffa500);
}

.action-btn.danger {
  background: var(--color-error, #ff6b6b);
}

/* ================================
   RESPONSIVE NAVIGATION
   ================================ */

@media (max-width: 480px) {
  .nav-content {
    padding: 0 var(--space-3);
  }
  
  .nav-brand {
    font-size: var(--text-base);
  }
  
  .breadcrumb-magical {
    flex-wrap: wrap;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
  }
  
  .breadcrumb-item {
    font-size: var(--text-sm);
    padding: var(--space-1) var(--space-2);
    min-width: 36px;
    min-height: 36px;
  }
  
  .menu-magical {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-4);
    padding: var(--space-4);
  }
  
  .menu-item {
    min-height: 100px;
    min-width: 100px;
    padding: var(--space-4);
  }
  
  .menu-item-icon {
    font-size: 2rem;
  }
  
  .menu-item-title {
    font-size: var(--text-base);
  }
  
  .action-bar {
    bottom: var(--space-3);
    gap: var(--space-2);
    padding: var(--space-2);
  }
  
  .action-btn {
    width: 48px;
    height: 48px;
    font-size: var(--text-lg);
  }
}

@media (max-width: 320px) {
  .menu-magical {
    grid-template-columns: 1fr;
    max-width: 280px;
  }
  
  .progress-nav {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  
  .progress-step {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
  }
  
  .progress-connector {
    width: 15px;
  }
}

/* ================================
   ACCESSIBILITY ENHANCEMENTS
   ================================ */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .nav-magical {
    background: white;
    border-bottom: 2px solid black;
  }
  
  .nav-brand {
    color: black;
  }
  
  .breadcrumb-magical {
    background: black !important;
  }
  
  .breadcrumb-item {
    color: white;
  }
  
  .menu-item {
    background: white;
    border: 2px solid black;
  }
  
  .menu-item-title {
    color: black;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .nav-magical,
  .breadcrumb-magical,
  .menu-item,
  .progress-step,
  .action-btn {
    transition: none;
  }
  
  .menu-item-icon {
    animation: none;
  }
  
  @keyframes float {
    0%, 100% {
      transform: none;
    }
  }
}

/* Focus management for keyboard navigation */
.nav-brand:focus,
.breadcrumb-item:focus,
.menu-item:focus,
.progress-step:focus,
.action-btn:focus {
  outline: 3px solid var(--color-wonder-teal, #4ecdc4);
  outline-offset: 2px;
}

/* Screen reader support */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Print styles */
@media print {
  .nav-magical,
  .breadcrumb-magical,
  .action-bar {
    display: none;
  }
}