/* Category Sections */
.category-section {
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 0.6s ease-out;
}

.category-section:nth-child(1) { animation-delay: 0.1s; }
.category-section:nth-child(2) { animation-delay: 0.2s; }
.category-section:nth-child(3) { animation-delay: 0.3s; }
.category-section:nth-child(4) { animation-delay: 0.4s; }

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

.category-header {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md) 0 var(--spacing-sm);
  border-bottom: 3px solid var(--clr-border);
  background: linear-gradient(90deg, var(--clr-surface), transparent);
  border-radius: var(--radius-sm);
}

.category-header h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--clr-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

/* Map Region Components */
.region-card {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 50%, rgba(0, 0, 0, 0.1) 100%);
}

.region-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.region-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.3);
}

.region-card:hover::before {
  opacity: 1;
}

.region-card:hover .region-emoji {
  transform: scale(1.1) rotate(5deg);
}

.region-card.selected {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  transform: translateY(-2px);
}

.region-card.selected::before {
  opacity: 0.7;
}

.region-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  z-index: 2;
  position: relative;
}

.region-emoji {
  font-size: 2.5rem;
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
  transition: transform 0.3s ease;
}

.region-info {
  flex: 1;
}

.region-info h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-xs) 0;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.region-card .progress-info {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Enhanced Tab Styling */
.tab-navigation {
  position: relative;
  background: var(--clr-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.tab-btn {
  position: relative;
}

/* Tab Panel Animations */
.tab-panel {
  position: relative;
}

.tab-panel.active {
  animation: slideInFromRight 0.3s ease-out;
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Tab Content Enhancements */
.tab-content {
  background: var(--clr-surface);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

/* Map Tab Specific Styling */
#map-tab .map-section {
  padding: var(--spacing-xl);
}

#map-tab .map-container {
  background: transparent;
  box-shadow: none;
  padding: 0;
}

/* Game Tab Specific Styling */
#game-tab .game-section {
  border-radius: 0;
  box-shadow: none;
}

/* Progress Tab Specific Styling */
#progress-tab .progress-section {
  border-radius: 0;
  box-shadow: none;
  padding: var(--spacing-xl);
}

/* Region Progress Bar */
.region-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  overflow: hidden;
}

.region-progress-fill {
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  transition: width 0.3s ease;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}



/* Flashcard Components - FIXED DESIGN */
.flashcard {
  width: 100%;
  max-width: 600px;
  height: clamp(240px, 40vh, 420px);
  margin: var(--spacing-xl) auto var(--spacing-md);
  position: relative;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
}

.flashcard.flipped .flashcard-back {
  clip-path: inset(0 0 0 0);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  font-size: 1.25rem;
  font-weight: 600;
  transition: clip-path 0.4s cubic-bezier(0.45, 0, 0.55, 1);
}

.flashcard-front {
  background: var(--clr-primary);
  color: white;
  z-index: 1;
}

.flashcard-back {
  background: var(--clr-surface);
  color: var(--clr-text);
  border: 2px solid var(--clr-border);
  clip-path: inset(0 0 100% 0);
  z-index: 2;
}

/* TTS Button Styling */
.tts-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s ease;
  backdrop-filter: blur(4px);
  z-index: 5;
}

.tts-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.flashcard-back .tts-btn {
  background: rgba(59, 130, 246, 0.2);
  color: var(--clr-primary);
}

.flashcard-back .tts-btn:hover {
  background: rgba(59, 130, 246, 0.3);
}

/* Flip Indicator Styling */
.flip-indicator {
  position: absolute;
  bottom: var(--spacing-sm);
  right: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  backdrop-filter: blur(4px);
  z-index: 4;
  transition: all 0.3s ease;
  animation: pulse 2s infinite;
  pointer-events: none;
}

.flashcard:hover .flip-indicator {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1) rotate(180deg);
  animation: none;
}

.flashcard-back .flip-indicator {
  background: rgba(59, 130, 246, 0.2);
  color: var(--clr-primary);
}

.flashcard-back:hover .flip-indicator {
  background: rgba(59, 130, 246, 0.3);
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.7;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
}

/* Flashcard Details Card - SEPARATE CARD DESIGN */
.flashcard-details-card {
  margin-top: var(--spacing-md);
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.details-content {
  padding: var(--spacing-lg);
  font-size: 1.1rem;
  line-height: 1.6;
}

.context-note,
.grammar-note {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.1);
  border-left: 3px solid var(--clr-primary);
  font-size: 1rem;
}

.context-note strong,
.grammar-note strong {
  color: var(--clr-primary);
  font-weight: 600;
  font-size: 1rem;
}

.word-breakdown {
  margin-top: var(--spacing-sm);
}

.word-breakdown strong {
  color: var(--clr-primary);
  font-weight: 600;
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
}

.breakdown-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.breakdown-item {
  padding: var(--spacing-sm);
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--clr-success);
  font-size: 1rem;
  line-height: 1.5;
}

.breakdown-item .word {
  font-weight: 600;
  color: var(--clr-success);
}

/* Flashcard Controls */
.flashcard-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.flashcard-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  transition: all 0.2s ease;
  min-width: 0;
  flex-shrink: 1;
}

.flashcard-btn.primary {
  background: var(--clr-primary);
  color: white;
}

.flashcard-btn.primary:hover {
  background: var(--clr-secondary);
}

.flashcard-btn.secondary {
  background: var(--clr-surface);
  color: var(--clr-text);
  border: 2px solid var(--clr-border);
}

.flashcard-btn.secondary:hover {
  background: var(--clr-background);
}

/* Mobile responsive adjustments for flashcard controls */
@media (max-width: 768px) {
  .flashcard-controls {
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }
  
  .flashcard-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.85rem;
    flex: 1;
    min-width: 0;
    max-width: calc(50% - var(--spacing-xs));
  }
  
  /* Stack buttons vertically on very small screens */
  @media (max-width: 480px) {
    .flashcard-controls {
      flex-direction: column;
      gap: var(--spacing-sm);
    }
    
    .flashcard-btn {
      max-width: none;
      width: 100%;
    }
  }
}

/* Quiz Components */
.quiz-question {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.quiz-question h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--clr-text);
}

.quiz-options {
  display: grid;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.quiz-option {
  padding: var(--spacing-md);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  background: var(--clr-surface);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  font-weight: 500;
}

.quiz-option:hover {
  border-color: var(--clr-primary);
  background: rgba(59, 130, 246, 0.05);
}

.quiz-option.correct {
  border-color: var(--clr-success);
  background: rgba(16, 185, 129, 0.1);
  color: var(--clr-success);
}

.quiz-option.incorrect {
  border-color: var(--clr-error);
  background: rgba(239, 68, 68, 0.1);
  color: var(--clr-error);
}

.quiz-feedback {
  text-align: center;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.quiz-feedback.correct {
  background: rgba(16, 185, 129, 0.1);
  color: var(--clr-success);
  border: 1px solid var(--clr-success);
}

.quiz-feedback.incorrect {
  background: rgba(239, 68, 68, 0.1);
  color: var(--clr-error);
  border: 1px solid var(--clr-error);
}

/* Call & Response Components */
.cr-prompt {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--clr-text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.cr-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  transition: border-color 0.2s ease;
}

.cr-input:focus {
  outline: none;
  border-color: var(--clr-primary);
}

.cr-submit {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--clr-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

.cr-submit:hover {
  background: var(--clr-secondary);
}

/* Enhanced Call & Response Feedback */
.cr-feedback {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
  border: 1px solid;
}

.cr-feedback.correct {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--clr-success);
  color: var(--clr-success);
}

.cr-feedback.incorrect {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--clr-error);
  color: var(--clr-error);
}

.feedback-details {
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  opacity: 0.8;
}

.correct-answer {
  font-weight: 600;
  margin: var(--spacing-xs) 0;
}

/* Call & Response Control Buttons */
.cr-controls {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-md);
}

.cr-try-again,
.cr-continue {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cr-try-again {
  background: var(--clr-warning);
  color: white;
}

.cr-try-again:hover {
  background: #d97706;
  transform: translateY(-1px);
}

.cr-continue {
  background: var(--clr-primary);
  color: white;
}

.cr-continue:hover {
  background: var(--clr-secondary);
  transform: translateY(-1px);
}

/* Progress Bar Components */
.progress-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.progress-title {
  font-weight: 600;
  color: var(--clr-text);
}

.progress-percentage {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  font-weight: 600;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-success), var(--clr-primary));
  transition: width 0.3s ease;
  border-radius: var(--radius-sm);
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.3s ease-in;
}

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

.slide-in {
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Loading States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  color: var(--clr-text-muted);
}

.loading::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--clr-border);
  border-top: 2px solid var(--clr-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--clr-text-muted);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
} 

/* Settings Button */
.settings-btn {
  background: var(--clr-surface);
  color: var(--clr-text);
  border: 2px solid var(--clr-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-btn:hover {
  background: var(--clr-primary);
  color: white;
  transform: scale(1.1);
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--clr-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 90vw;
  max-height: 90vh;
  overflow: hidden;
  border: 2px solid var(--clr-border);
}

.settings-modal {
  width: 600px;
  max-height: 80vh;
}

.flashcard-tip-modal {
  width: 500px;
  max-width: 90vw;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 2px solid var(--clr-border);
  background: var(--clr-primary);
  color: white;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s ease;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: 60vh;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-top: 2px solid var(--clr-border);
  background: var(--clr-background);
}

/* Settings Sections */
.settings-section {
  margin-bottom: var(--spacing-xl);
}

.settings-section h3 {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--clr-primary);
  font-size: 1.1rem;
  border-bottom: 2px solid var(--clr-border);
  padding-bottom: var(--spacing-xs);
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--clr-background);
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
}

.setting-item label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-weight: 500;
}

.setting-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--clr-primary);
}

.setting-item input[type="range"] {
  width: 120px;
  margin: 0 var(--spacing-sm);
}

.setting-item select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: 0.9rem;
}

.setting-item span {
  min-width: 40px;
  text-align: right;
  font-weight: 600;
  color: var(--clr-primary);
}

/* Button Styles */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
}

.btn.primary {
  background: var(--clr-primary);
  color: white;
}

.btn.primary:hover {
  background: var(--clr-secondary);
  transform: translateY(-1px);
}

.btn.secondary {
  background: var(--clr-surface);
  color: var(--clr-text);
  border: 2px solid var(--clr-border);
}

.btn.secondary:hover {
  background: var(--clr-background);
  border-color: var(--clr-primary);
}

/* Accessibility Classes */
.compact-mode {
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.5rem;
}

.large-text {
  font-size: 1.1rem;
}

.large-text .flashcard-front,
.large-text .flashcard-back {
  font-size: 1.4rem;
}

.high-contrast {
  --clr-primary: #0000ff;
  --clr-secondary: #ff0000;
  --clr-success: #00ff00;
  --clr-error: #ff0000;
  --clr-warning: #ffff00;
}

/* Reduce motion for accessibility */
.reduce-motion * {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
}

/* Clickable Words and Popup Styles */
.clickable-word {
  cursor: pointer;
  color: inherit;
  transition: all 0.2s ease;
  border-radius: 2px;
  padding: 1px 2px;
}

.clickable-word:hover {
  background: rgba(59, 130, 246, 0.1);
  text-decoration-color: var(--clr-secondary);
  transform: translateY(-1px);
}

.clickable-word:active {
  transform: translateY(0);
}

/* Multi-word phrase styling */
.clickable-word.multi-word-phrase {
  border-bottom: 2px dotted rgba(59, 130, 246, 0.6);
  padding: 2px 4px;
  margin: 0 1px;
  background: rgba(59, 130, 246, 0.05);
}

.clickable-word.multi-word-phrase:hover {
  background: rgba(59, 130, 246, 0.15);
  border-bottom-color: var(--clr-primary);
  border-bottom-style: solid;
}

/* Word Popup */
.word-popup {
  position: fixed;
  z-index: 10000;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-width: 300px;
  min-width: 200px;
  animation: popupFadeIn 0.2s ease-out;
  backdrop-filter: blur(8px);
}

@keyframes popupFadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.popup-content {
  padding: 0;
  overflow: hidden;
}

.popup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--clr-primary);
  color: white;
  border-bottom: 1px solid var(--clr-border);
}

.popup-word {
  font-weight: 600;
  font-size: 1rem;
}

.popup-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s ease;
}

.popup-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.popup-body {
  padding: var(--spacing-md);
}

.popup-explanation {
  color: var(--clr-text);
  font-size: 0.9rem;
  line-height: 1.4;
}

/* Dark mode adjustments for popup */
[data-theme="dark"] .word-popup {
  background: var(--clr-surface);
  border-color: var(--clr-border);
}

[data-theme="dark"] .popup-explanation {
  color: var(--clr-text);
}

/* Responsive popup positioning */
@media (max-width: 768px) {
  .word-popup {
    max-width: calc(100vw - 40px);
    min-width: 250px;
  }
  
  .popup-content {
    font-size: 0.9rem;
  }
}

/* Ensure popup doesn't go off-screen */
.word-popup {
  max-height: 200px;
  overflow-y: auto;
}

/* Hover effect for clickable words in different contexts */
.flashcard-front .clickable-word,
.flashcard-back .clickable-word {
  color: inherit;
  text-decoration-color: rgba(255, 255, 255, 0.8);
}

.flashcard-front .clickable-word:hover {
  background: rgba(255, 255, 255, 0.2);
  text-decoration-color: white;
}

.flashcard-back .clickable-word:hover {
  background: rgba(59, 130, 246, 0.15);
}

.quiz-option .clickable-word:hover {
  background: rgba(59, 130, 246, 0.1);
}

.cr-prompt .clickable-word:hover {
  background: rgba(59, 130, 246, 0.1);
}
/
* Tip Notification Styles */
.tip-notification {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  color: white;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  animation: slideInFromTop 0.4s ease-out;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

@keyframes slideInFromTop {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tip-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  gap: var(--spacing-md);
}

.tip-text {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  flex: 1;
}

.tip-close {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.tip-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

/* Mobile responsive adjustments for tip */
@media (max-width: 768px) {
  .tip-content {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .tip-text {
    font-size: 0.9rem;
  }
  
  .tip-close {
    width: 24px;
    height: 24px;
    font-size: 1rem;
  }
}