/* 🎨 Visual & UX Enhancements for Turkish Learning App */

/* Enhanced CSS Variables with Dark Mode Support */
:root {
  /* Light Theme Variables */
  --bg-primary: #F9FAFB;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F3F4F6;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-accent: #4A90E2;
  
  /* Enhanced Glass Morphism */
  --glass-bg-light: rgba(255, 255, 255, 0.25);
  --glass-bg-strong: rgba(255, 255, 255, 0.4);
  --glass-border-light: rgba(255, 255, 255, 0.18);
  --glass-shadow-light: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --glass-shadow-strong: 0 12px 48px 0 rgba(31, 38, 135, 0.5);
  
  /* Animation Variables */
  --animation-fast: 0.2s;
  --animation-normal: 0.3s;
  --animation-slow: 0.5s;
  --animation-extra-slow: 0.8s;
  --bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* Card Sizes */
  --card-size-small: 280px;
  --card-size-medium: 320px;
  --card-size-large: 380px;
  
  /* Font Sizes */
  --font-size-small: 0.875rem;
  --font-size-normal: 1rem;
  --font-size-large: 1.125rem;
  --font-size-extra-large: 1.25rem;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #0F1419;
  --bg-secondary: #1A1F2E;
  --bg-tertiary: #252A3A;
  --text-primary: #E5E7EB;
  --text-secondary: #9CA3AF;
  --text-accent: #6BA3E8;
  
  /* Dark Glass Morphism */
  --glass-bg-light: rgba(26, 31, 46, 0.4);
  --glass-bg-strong: rgba(26, 31, 46, 0.6);
  --glass-border-light: rgba(255, 255, 255, 0.1);
  --glass-shadow-light: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --glass-shadow-strong: 0 12px 48px 0 rgba(0, 0, 0, 0.6);
  
  /* Preserve brand colors in dark mode */
  --primary-blue: #6BA3E8;
  --primary-yellow: #FFE082;
  --primary-green: #4ADE80;
  --accent-orange: #FFAB40;
  --accent-purple: #CE93D8;
}

/* Theme Transition */
* {
  transition: background-color var(--animation-normal) var(--smooth),
              color var(--animation-normal) var(--smooth),
              border-color var(--animation-normal) var(--smooth),
              box-shadow var(--animation-normal) var(--smooth);
}

/* Enhanced Body Styling */
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-size-normal);
  transition: all var(--animation-normal) var(--smooth);
}

/* 🌙 Comprehensive Dark Mode Coverage */

/* Navigation Components */
[data-theme="dark"] .nav-container,
[data-theme="dark"] .navigation,
[data-theme="dark"] .nav-bar {
  background: var(--glass-bg-strong) !important;
  backdrop-filter: blur(20px) !important;
  border-color: var(--glass-border-light) !important;
  box-shadow: var(--glass-shadow-light) !important;
}

[data-theme="dark"] .nav-item,
[data-theme="dark"] .nav-link {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .nav-item:hover,
[data-theme="dark"] .nav-link:hover {
  color: var(--text-accent) !important;
  background: var(--glass-bg-light) !important;
}

[data-theme="dark"] .nav-item.active,
[data-theme="dark"] .nav-link.active {
  color: var(--primary-blue) !important;
}

/* Main Content Areas */
[data-theme="dark"] .main-content,
[data-theme="dark"] .content-area,
[data-theme="dark"] .app-container {
  background: var(--bg-primary) !important;
  color: var(--text-primary) !important;
}

/* Cards and Containers */
[data-theme="dark"] .card,
[data-theme="dark"] .glass-card,
[data-theme="dark"] .category-card,
[data-theme="dark"] .achievement-card,
[data-theme="dark"] .challenge-card,
[data-theme="dark"] .leaderboard-card {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  backdrop-filter: blur(20px) !important;
  box-shadow: var(--glass-shadow-light) !important;
  color: var(--text-primary) !important;
}

[data-theme="dark"] .card:hover,
[data-theme="dark"] .glass-card:hover,
[data-theme="dark"] .category-card:hover {
  background: var(--glass-bg-strong) !important;
  box-shadow: var(--glass-shadow-strong) !important;
}

/* Flashcards */
[data-theme="dark"] .flashcard,
[data-theme="dark"] .flashcard .card-face,
[data-theme="dark"] .flashcard .card-front,
[data-theme="dark"] .flashcard .card-back {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
  backdrop-filter: blur(20px) !important;
  box-shadow: var(--glass-shadow-light) !important;
}

/* Text Elements */
[data-theme="dark"] h1,
[data-theme="dark"] h2, 
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
  color: var(--text-primary) !important;
}

[data-theme="dark"] p,
[data-theme="dark"] span,
[data-theme="dark"] div {
  color: var(--text-primary);
}

[data-theme="dark"] .text-secondary {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .text-accent {
  color: var(--text-accent) !important;
}

/* Buttons */
[data-theme="dark"] button,
[data-theme="dark"] .btn {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
  backdrop-filter: blur(10px) !important;
}

[data-theme="dark"] button:hover,
[data-theme="dark"] .btn:hover {
  background: var(--glass-bg-strong) !important;
  color: var(--text-accent) !important;
}

/* Primary Buttons */
[data-theme="dark"] .btn-primary {
  background: var(--primary-blue) !important;
  color: white !important;
}

[data-theme="dark"] .btn-secondary {
  background: var(--glass-bg-strong) !important;
  color: var(--text-primary) !important;
}

/* Form Elements */
[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
  border-color: var(--primary-blue) !important;
  box-shadow: 0 0 0 2px rgba(107, 163, 232, 0.2) !important;
}

/* Progress Bars */
[data-theme="dark"] .progress-bar,
[data-theme="dark"] .category-progress-bar {
  background: var(--glass-bg-light) !important;
}

[data-theme="dark"] .progress-fill,
[data-theme="dark"] .category-progress-fill {
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple)) !important;
}

/* Analytics Dashboard */
[data-theme="dark"] .analytics-container,
[data-theme="dark"] .analytics-section {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  backdrop-filter: blur(20px) !important;
}

[data-theme="dark"] .chart-container {
  background: var(--bg-secondary) !important;
  border-color: var(--glass-border-light) !important;
}

/* Gamification Elements */
[data-theme="dark"] .gamification-section,
[data-theme="dark"] .daily-challenge,
[data-theme="dark"] .weekly-leaderboard,
[data-theme="dark"] .achievement-chain,
[data-theme="dark"] .theme-selector {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
  backdrop-filter: blur(20px) !important;
}

/* Profile Section */
[data-theme="dark"] .profile-section,
[data-theme="dark"] .user-stats,
[data-theme="dark"] .user-info {
  background: var(--glass-bg-light) !important;
  color: var(--text-primary) !important;
}

/* Modal and Overlays */
[data-theme="dark"] .modal,
[data-theme="dark"] .overlay,
[data-theme="dark"] .popup {
  background: var(--glass-bg-strong) !important;
  backdrop-filter: blur(30px) !important;
  border-color: var(--glass-border-light) !important;
}

/* Lists and Items */
[data-theme="dark"] .list-item,
[data-theme="dark"] li {
  color: var(--text-primary) !important;
  border-color: var(--glass-border-light) !important;
}

/* Borders and Dividers */
[data-theme="dark"] .border,
[data-theme="dark"] .border-t,
[data-theme="dark"] .border-b,
[data-theme="dark"] .border-l,
[data-theme="dark"] .border-r,
[data-theme="dark"] hr {
  border-color: var(--glass-border-light) !important;
}

/* Shadows */
[data-theme="dark"] .shadow,
[data-theme="dark"] .shadow-lg,
[data-theme="dark"] .shadow-xl {
  box-shadow: var(--glass-shadow-light) !important;
}

/* Dropdowns */
[data-theme="dark"] .dropdown,
[data-theme="dark"] .dropdown-menu {
  background: var(--glass-bg-strong) !important;
  border-color: var(--glass-border-light) !important;
  backdrop-filter: blur(20px) !important;
}

[data-theme="dark"] .dropdown-item:hover {
  background: var(--glass-bg-light) !important;
  color: var(--text-accent) !important;
}

/* Tables */
[data-theme="dark"] table,
[data-theme="dark"] th,
[data-theme="dark"] td {
  background: var(--glass-bg-light) !important;
  color: var(--text-primary) !important;
  border-color: var(--glass-border-light) !important;
}

[data-theme="dark"] tr:hover {
  background: var(--glass-bg-strong) !important;
}

/* 🇹🇷 Turkish Learning App Specific Dark Mode Coverage */

/* Main Container */
[data-theme="dark"] .container,
[data-theme="dark"] .main-container {
  background: var(--bg-primary) !important;
}

/* Header and Navigation */
[data-theme="dark"] .app-header {
  background: var(--glass-bg-strong) !important;
  backdrop-filter: blur(20px) !important;
  border-bottom: 1px solid var(--glass-border-light) !important;
}

[data-theme="dark"] .nav-pills .nav-link {
  background: transparent !important;
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .nav-pills .nav-link.active {
  background: var(--primary-blue) !important;
  color: white !important;
}

[data-theme="dark"] .nav-pills .nav-link:hover {
  background: var(--glass-bg-light) !important;
  color: var(--text-accent) !important;
}

/* Learning Sections */
[data-theme="dark"] .learning-section,
[data-theme="dark"] .review-section,
[data-theme="dark"] .profile-section {
  background: var(--bg-primary) !important;
}

/* Category Cards */
[data-theme="dark"] .categories-grid .category-card {
  background: var(--glass-bg-light) !important;
  backdrop-filter: blur(20px) !important;
  border: 1px solid var(--glass-border-light) !important;
}

[data-theme="dark"] .category-header {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .category-name {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .category-stats {
  color: var(--text-secondary) !important;
}

/* Flashcard Specific Styles */
[data-theme="dark"] .flashcard-container {
  background: var(--bg-primary) !important;
}

[data-theme="dark"] .word-turkish {
  color: var(--primary-blue) !important;
}

[data-theme="dark"] .word-arabic {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .word-english {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .pronunciation {
  color: var(--accent-orange) !important;
}

[data-theme="dark"] .example-sentence {
  color: var(--text-primary) !important;
}

/* Audio Controls */
[data-theme="dark"] .audio-controls,
[data-theme="dark"] .audio-button {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
}

[data-theme="dark"] .audio-button:hover {
  background: var(--primary-blue) !important;
  color: white !important;
}

/* Rating System */
[data-theme="dark"] .rating-container,
[data-theme="dark"] .rating-buttons {
  background: var(--glass-bg-light) !important;
  backdrop-filter: blur(20px) !important;
}

[data-theme="dark"] .rating-button {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
}

[data-theme="dark"] .rating-button:hover {
  background: var(--glass-bg-strong) !important;
  transform: scale(1.05) !important;
}

/* User Stats and Progress */
[data-theme="dark"] .user-stats,
[data-theme="dark"] .progress-stats {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
}

[data-theme="dark"] .stat-value {
  color: var(--primary-blue) !important;
}

[data-theme="dark"] .stat-label {
  color: var(--text-secondary) !important;
}

/* Session Progress */
[data-theme="dark"] .session-progress {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
}

[data-theme="dark"] .session-progress-fill {
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple)) !important;
}

/* Achievement System */
[data-theme="dark"] .achievements-grid .achievement-item {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
  backdrop-filter: blur(20px) !important;
}

[data-theme="dark"] .achievement-title {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .achievement-description {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .achievement-reward {
  color: var(--primary-yellow) !important;
}

/* Leaderboard */
[data-theme="dark"] .leaderboard-container {
  background: var(--glass-bg-light) !important;
  backdrop-filter: blur(20px) !important;
  border-color: var(--glass-border-light) !important;
}

[data-theme="dark"] .leaderboard-item {
  background: var(--glass-bg-light) !important;
  border-bottom: 1px solid var(--glass-border-light) !important;
}

[data-theme="dark"] .leaderboard-item:hover {
  background: var(--glass-bg-strong) !important;
}

[data-theme="dark"] .leaderboard-rank {
  color: var(--primary-blue) !important;
}

[data-theme="dark"] .leaderboard-name {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .leaderboard-score {
  color: var(--text-accent) !important;
}

/* Analytics Dashboard Dark Mode */
[data-theme="dark"] .heatmap-container {
  background: var(--bg-secondary) !important;
}

[data-theme="dark"] .heatmap-day {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
}

[data-theme="dark"] .heatmap-day.has-activity {
  background: var(--primary-blue) !important;
}

/* Daily Challenges */
[data-theme="dark"] .daily-challenges .challenge-item {
  background: var(--glass-bg-light) !important;
  border-left: 4px solid var(--accent-orange) !important;
}

[data-theme="dark"] .challenge-title {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .challenge-progress {
  color: var(--text-secondary) !important;
}

/* Theme Selector (for gamification unlockable themes) */
[data-theme="dark"] .theme-preview {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
}

[data-theme="dark"] .theme-name {
  color: var(--text-primary) !important;
}

/* Notification System */
[data-theme="dark"] .notification,
[data-theme="dark"] .toast {
  background: var(--glass-bg-strong) !important;
  backdrop-filter: blur(30px) !important;
  border-color: var(--glass-border-light) !important;
  color: var(--text-primary) !important;
}

/* Tooltips */
[data-theme="dark"] .tooltip:before {
  background: var(--glass-bg-strong) !important;
  color: var(--text-primary) !important;
  border-color: var(--glass-border-light) !important;
}

/* Scrollbars (Webkit) */
[data-theme="dark"] ::-webkit-scrollbar {
  background: var(--bg-secondary) !important;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--glass-bg-light) !important;
  border-color: var(--glass-border-light) !important;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background: var(--glass-bg-strong) !important;
}

/* Loading States */
[data-theme="dark"] .loading,
[data-theme="dark"] .spinner {
  border-color: var(--glass-border-light) var(--glass-border-light) var(--primary-blue) var(--glass-border-light) !important;
}

/* Arabic Text Specific */
[data-theme="dark"] .arabic-text {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .turkish-text {
  color: var(--primary-blue) !important;
}

/* Ensure important text remains visible */
[data-theme="dark"] .text-white {
  color: white !important;
}

[data-theme="dark"] .text-black {
  color: var(--text-primary) !important;
}

/* Fix any background utilities that might conflict */
[data-theme="dark"] .bg-white {
  background: var(--bg-secondary) !important;
}

[data-theme="dark"] .bg-gray-50,
[data-theme="dark"] .bg-gray-100,
[data-theme="dark"] .bg-gray-200 {
  background: var(--glass-bg-light) !important;
}

[data-theme="dark"] .bg-blue-50,
[data-theme="dark"] .bg-blue-100 {
  background: rgba(107, 163, 232, 0.1) !important;
}

/* Dark Mode Toggle Button */
.theme-toggle {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border-light);
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow-light);
  transition: all var(--animation-normal) var(--bounce);
  color: var(--text-accent);
  font-size: 1.25rem;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--glass-shadow-strong);
  background: var(--glass-bg-strong);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* Enhanced Card Animations */
@keyframes cardFlipIn {
  0% {
    transform: perspective(600px) rotateY(-90deg);
    opacity: 0;
  }
  40% {
    transform: perspective(600px) rotateY(-15deg);
  }
  70% {
    transform: perspective(600px) rotateY(15deg);
  }
  100% {
    transform: perspective(600px) rotateY(0deg);
    opacity: 1;
  }
}

@keyframes cardFlipOut {
  0% {
    transform: perspective(600px) rotateY(0deg);
    opacity: 1;
  }
  100% {
    transform: perspective(600px) rotateY(90deg);
    opacity: 0;
  }
}

@keyframes cardFlip {
  0% { transform: perspective(600px) rotateY(0deg); }
  50% { transform: perspective(600px) rotateY(-90deg); }
  100% { transform: perspective(600px) rotateY(0deg); }
}

@keyframes slideInFromRight {
  0% {
    transform: translateX(100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInFromLeft {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  0% {
    transform: translateY(20px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

/* Enhanced Card Styles with Proper Sizing */
.flashcard-container {
  perspective: 1000px;
  max-width: var(--card-size-medium);
  margin: 0 auto;
  cursor: pointer;
  transition: all var(--animation-normal) var(--smooth);
}

.flashcard {
  position: relative;
  width: 100%;
  height: calc(var(--card-size-medium) * 0.65);
  transform-style: preserve-3d;
  transition: transform 0.6s, all var(--animation-normal) var(--smooth);
  animation: fadeInUp var(--animation-slow) var(--bounce);
  margin: 1rem auto;
}

.flashcard:hover {
  transform: translateY(-8px);
  box-shadow: var(--glass-shadow-strong);
}

.flashcard.flipping .card-inner {
  animation: cardFlip var(--animation-slow) var(--smooth);
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform var(--animation-slow) var(--smooth);
  transform-style: preserve-3d;
}

.flashcard.is-flipped .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  background: var(--glass-bg-light);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--border-radius-lg);
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow-light);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  transition: all var(--animation-normal) var(--smooth);
}

.card-back {
  transform: rotateY(180deg);
}

/* Loading Skeletons */
.skeleton {
  background: linear-gradient(90deg, 
    var(--glass-bg-light) 25%, 
    var(--glass-bg-strong) 50%, 
    var(--glass-bg-light) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--border-radius);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-card {
  width: var(--card-size-medium);
  height: calc(var(--card-size-medium) * 0.7);
  margin: 1rem;
}

.skeleton-text {
  height: 1rem;
  margin: 0.5rem 0;
  border-radius: 0.5rem;
}

.skeleton-text.large { height: 1.5rem; }
.skeleton-text.small { height: 0.75rem; }
.skeleton-text.w-75 { width: 75%; }
.skeleton-text.w-50 { width: 50%; }
.skeleton-text.w-25 { width: 25%; }

/* Enhanced Button Animations */
.btn-animated {
  position: relative;
  overflow: hidden;
  transition: all var(--animation-normal) var(--smooth);
  transform: perspective(1px) translateZ(0);
}

.btn-animated:before {
  content: '';
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--animation-normal) var(--smooth);
}

.btn-animated:hover:before {
  opacity: 1;
}

.btn-animated:hover {
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow-strong);
}

.btn-animated:active {
  transform: translateY(0);
}

/* Micro-interactions */
.interactive-element {
  transition: all var(--animation-fast) var(--smooth);
}

.interactive-element:hover {
  transform: scale(1.02);
}

.interactive-element:active {
  transform: scale(0.98);
}

/* Gesture Controls Indicators */
.swipe-indicator {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity var(--animation-normal) var(--smooth);
  color: var(--text-secondary);
  font-size: 2rem;
  pointer-events: none;
}

.swipe-indicator.left {
  left: -3rem;
  animation: slideHintLeft 2s infinite;
}

.swipe-indicator.right {
  right: -3rem;
  animation: slideHintRight 2s infinite;
}

@keyframes slideHintLeft {
  0%, 100% { transform: translateY(-50%) translateX(0); opacity: 0.3; }
  50% { transform: translateY(-50%) translateX(-10px); opacity: 1; }
}

@keyframes slideHintRight {
  0%, 100% { transform: translateY(-50%) translateX(0); opacity: 0.3; }
  50% { transform: translateY(-50%) translateX(10px); opacity: 1; }
}

.flashcard:hover .swipe-indicator {
  opacity: 1;
}

/* Customization Panel */
.customization-panel {
  position: fixed;
  top: 0;
  right: -320px;
  width: 320px;
  height: 100vh;
  background: var(--glass-bg-strong);
  border-left: 1px solid var(--glass-border-light);
  backdrop-filter: blur(20px);
  z-index: 1001;
  transition: transform var(--animation-normal) var(--smooth);
  padding: 2rem;
  overflow-y: auto;
  box-shadow: var(--glass-shadow-strong);
}

.customization-panel.open {
  transform: translateX(-320px);
}

.customization-toggle {
  position: fixed;
  top: 5rem;
  right: 1rem;
  z-index: 1000;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border-light);
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow-light);
  transition: all var(--animation-normal) var(--bounce);
  color: var(--text-accent);
  font-size: 1.25rem;
}

.customization-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--glass-shadow-strong);
}

/* Enhanced Navigation */
.nav-container {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px);
  transition: all var(--animation-normal) var(--smooth);
}

.nav-item {
  transition: all var(--animation-fast) var(--smooth);
  position: relative;
}

.nav-item:hover {
  transform: translateY(-2px);
}

.nav-item:before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  transition: width var(--animation-normal) var(--smooth);
}

.nav-item:hover:before,
.nav-item.active:before {
  width: 100%;
}

/* Enhanced Glass Cards */
.glass-card {
  background: var(--glass-bg-light);
  border: 1px solid var(--glass-border-light);
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow-light);
  transition: all var(--animation-normal) var(--smooth);
}

.glass-card:hover {
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-shadow-strong);
  transform: translateY(-2px);
}

/* Responsive Font Sizes */
.font-small { font-size: var(--font-size-small) !important; }
.font-normal { font-size: var(--font-size-normal) !important; }
.font-large { font-size: var(--font-size-large) !important; }
.font-extra-large { font-size: var(--font-size-extra-large) !important; }

/* Responsive Card Sizes with Complete Scaling */

/* Small Card Size */
body.card-small .flashcard-container {
  max-width: var(--card-size-small);
}

body.card-small .flashcard {
  height: calc(var(--card-size-small) * 0.65);
}

body.card-small .flashcard-turkish {
  font-size: 1.5rem !important;
}

body.card-small .flashcard-arabic {
  font-size: 1.3rem !important;
}

body.card-small .flashcard-english {
  font-size: 1rem !important;
}

body.card-small .flashcard-pronunciation {
  font-size: 0.875rem !important;
}

body.card-small .example-turkish {
  font-size: 0.875rem !important;
}

body.card-small .example-arabic {
  font-size: 0.875rem !important;
}

/* Medium Card Size (Default) */
body.card-medium .flashcard-container {
  max-width: var(--card-size-medium);
}

body.card-medium .flashcard {
  height: calc(var(--card-size-medium) * 0.65);
}

body.card-medium .flashcard-turkish {
  font-size: 2rem !important;
}

body.card-medium .flashcard-arabic {
  font-size: 1.8rem !important;
}

body.card-medium .flashcard-english {
  font-size: 1.2rem !important;
}

body.card-medium .flashcard-pronunciation {
  font-size: 1rem !important;
}

/* Large Card Size */
body.card-large .flashcard-container {
  max-width: var(--card-size-large);
}

body.card-large .flashcard {
  height: calc(var(--card-size-large) * 0.65);
}

body.card-large .flashcard-turkish {
  font-size: 2.5rem !important;
}

body.card-large .flashcard-arabic {
  font-size: 2.2rem !important;
}

body.card-large .flashcard-english {
  font-size: 1.5rem !important;
}

body.card-large .flashcard-pronunciation {
  font-size: 1.25rem !important;
}

body.card-large .example-turkish {
  font-size: 1.125rem !important;
}

body.card-large .example-arabic {
  font-size: 1.125rem !important;
}

body.card-large .cultural-note {
  font-size: 1rem !important;
}

body.card-large .regional-variations {
  font-size: 1rem !important;
}

/* Success/Error Animations */
.success-animation {
  animation: pulse var(--animation-normal) var(--bounce);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
}

.error-animation {
  animation: shake var(--animation-normal) var(--smooth);
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Progress Indicators with Animation */
.progress-bar {
  background: var(--glass-bg-light);
  border-radius: 1rem;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
  transition: width var(--animation-extra-slow) var(--smooth);
  position: relative;
}

.progress-fill:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: progressShine 2s infinite;
}

@keyframes progressShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Mobile Optimizations with Proper Card Sizing */
@media (max-width: 768px) {
  .theme-toggle,
  .customization-toggle {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1rem;
  }
  
  .customization-panel {
    width: 100vw;
    right: -100vw;
  }
  
  .customization-panel.open {
    transform: translateX(-100vw);
  }
  
  /* Mobile Card Sizing */
  .flashcard-container {
    max-width: min(var(--card-size-medium), 90vw) !important;
  }
  
  .flashcard {
    height: calc(min(var(--card-size-medium), 90vw) * 0.6) !important;
  }
  
  body.card-small .flashcard-container {
    max-width: min(var(--card-size-small), 90vw) !important;
  }
  
  body.card-small .flashcard {
    height: calc(min(var(--card-size-small), 90vw) * 0.6) !important;
  }
  
  body.card-large .flashcard-container {
    max-width: min(var(--card-size-large), 90vw) !important;
  }
  
  body.card-large .flashcard {
    height: calc(min(var(--card-size-large), 90vw) * 0.6) !important;
  }
  
  /* Adjust font sizes for mobile */
  body.card-large .flashcard-turkish {
    font-size: 2rem !important;
  }
  
  body.card-large .flashcard-arabic {
    font-size: 1.8rem !important;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Styles */
.interactive-element:focus,
.btn-animated:focus,
.theme-toggle:focus,
.customization-toggle:focus {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

/* Enhanced Tooltip Animations */
.tooltip {
  position: relative;
}

.tooltip:before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-5px);
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--animation-normal) var(--smooth);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border-light);
  z-index: 1000;
}

.tooltip:hover:before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-10px);
}
/* Card Size Scaling for Enhanced Content Components */

/* Small size scaling for enhanced content */
body.card-small .cultural-note,
body.card-small .multiple-examples,
body.card-small .regional-variations {
  padding: 1rem !important;
  font-size: 0.85rem !important;
}

body.card-small .cultural-note h4,
body.card-small .multiple-examples h4,
body.card-small .regional-variations h4 {
  font-size: 0.9rem !important;
}

/* Large size scaling for enhanced content */
body.card-large .cultural-note,
body.card-large .multiple-examples,
body.card-large .regional-variations {
  padding: 2rem !important;
  font-size: 1.1rem !important;
}

body.card-large .cultural-note h4,
body.card-large .multiple-examples h4,
body.card-large .regional-variations h4 {
  font-size: 1.2rem !important;
}

/* Phrase flashcard scaling */
body.card-small .phrase-flashcard {
  max-width: var(--card-size-small) !important;
  min-height: calc(var(--card-size-small) * 0.65) !important;
  padding: 1.5rem !important;
}

body.card-small .phrase-turkish {
  font-size: 1.5rem !important;
}

body.card-small .phrase-arabic {
  font-size: 1.3rem !important;
}

body.card-large .phrase-flashcard {
  max-width: var(--card-size-large) !important;
  min-height: calc(var(--card-size-large) * 0.65) !important;
  padding: 2.5rem !important;
}

body.card-large .phrase-turkish {
  font-size: 2.5rem !important;
}

body.card-large .phrase-arabic {
  font-size: 2rem !important;
}