/* Vocabulary Activities Stylesheet */
/* Consolidated from inline :css blocks */

/* === Word Introduction Activity === */
.word-introduction {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Alert Badge */
.word-introduction .alert-badge {
  text-align: center;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 50px;
  display: inline-flex;
  align-items: center;
  font-size: 1.1rem;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
  margin-left: 50%;
  transform: translateX(-50%);
}

/* Word Display Card */
.word-introduction .word-display-card {
  background: white;
  border-radius: 16px;
  padding: 3rem 2rem;
  margin-bottom: 2rem;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid #e9ecef;
}

/* New Word Display (custom, not using shared partial) */
.word-introduction .new-word-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.word-introduction .word-main {
  font-size: 3rem;
  font-weight: 700;
  color: #2c3e50;
  font-family: 'Georgia', serif;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.word-introduction .word-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.word-introduction .word-pos,
.word-introduction .word-pronunciation {
  font-size: 1rem;
  color: #6c757d;
  font-style: italic;
}

.word-introduction .word-speaker {
  margin-top: 0.5rem;
}

.word-introduction .word-speaker .btn {
  font-size: 1.5rem;
  color: #667eea;
  transition: all 0.2s ease;
  opacity: 0.8;
}

.word-introduction .word-speaker .btn:hover {
  opacity: 1;
  color: #764ba2;
  transform: scale(1.1);
}

.word-introduction .part-of-speech {
  margin-bottom: 1.5rem;
}

.word-introduction .part-of-speech .badge {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.word-introduction .pronunciation-section {
  margin-top: 1.5rem;
}

.word-introduction .pronunciation-button {
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  transition: all 0.3s ease;
}

.word-introduction .pronunciation-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.word-introduction .pronunciation-button.playing {
  background: #28a745;
  border-color: #28a745;
  color: white;
}

.word-introduction .pronunciation-text {
  color: #6c757d;
  font-family: monospace;
  font-size: 1rem;
  font-style: italic;
}

/* Test Out Section */
.word-introduction .test-out-section {
  margin-bottom: 2rem;
}

.word-introduction .test-out-card {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border-radius: 16px;
  padding: 2rem;
  border: 2px solid #dee2e6;
  position: relative;
  overflow: hidden;
}

.word-introduction .test-out-icon {
  text-align: center;
  font-size: 2.5rem;
  color: #ffc107;
  margin-bottom: 1rem;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.word-introduction .test-out-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 0.75rem;
  text-align: center;
}

.word-introduction .test-out-description {
  font-size: 1.05rem;
  color: #6c757d;
  margin-bottom: 1.5rem;
  text-align: center;
  line-height: 1.6;
}

.word-introduction .test-out-input {
  width: 100%;
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  border: 2px solid #dee2e6;
  border-radius: 12px;
  transition: all 0.3s ease;
  font-family: inherit;
  resize: vertical;
}

.word-introduction .test-out-input:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.15);
  outline: none;
}

.word-introduction .test-out-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.word-introduction .test-out-buttons button {
  flex: 1;
  min-width: 180px;
  padding: 0.875rem 1.5rem;
  font-size: 1.05rem;
  border-radius: 50px;
  transition: all 0.3s ease;
}

.word-introduction .test-out-buttons button:hover {
  transform: translateY(-2px);
}

.word-introduction .dont-know-button:hover {
  box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
}

.word-introduction .submit-test-button:hover {
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
}

.word-introduction .test-out-feedback {
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

/* Word Content Section */
.word-introduction .word-content {
  margin-top: 2rem;
}

/* Learning Section */
.word-introduction .learning-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.word-introduction .definition-card,
.word-introduction .example-card {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid #e9ecef;
  display: flex;
  gap: 1.5rem;
}

.word-introduction .card-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 1.5rem;
}

.word-introduction .definition-icon {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.word-introduction .example-icon {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
}

.word-introduction .card-content {
  flex: 1;
}

.word-introduction .section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 0.75rem;
}

.word-introduction .definition-text,
.word-introduction .example-text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: #495057;
  margin: 0;
}

.word-introduction .example-text em {
  font-style: italic;
  color: #6c757d;
}

/* Etymology */
.word-introduction .etymology-card {
  background: linear-gradient(135deg, #fff5e6 0%, #ffe4cc 100%);
  border-radius: 16px;
  padding: 1.5rem;
  border: 2px solid #ffc107;
}

.word-introduction .etymology-toggle summary {
  cursor: pointer;
  font-size: 1.05rem;
  color: #856404;
  user-select: none;
  list-style: none;
  padding: 0.5rem;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.word-introduction .etymology-toggle summary:hover {
  background: rgba(255, 193, 7, 0.1);
}

.word-introduction .etymology-toggle summary::-webkit-details-marker {
  display: none;
}

.word-introduction .etymology-content {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 193, 7, 0.3);
}

.word-introduction .etymology-content p {
  font-size: 1rem;
  color: #6c5a2e;
  line-height: 1.6;
  margin: 0;
}

/* Got It Button */
.word-introduction .word-learned-confirmation {
  margin-top: 2rem;
  text-align: center;
}

/* === Multiple Choice Activity === */
.multiple-choice-activity {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.multiple-choice-activity .question-text {
  font-size: 1.5rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 2rem;
  text-align: center;
}

.multiple-choice-activity .choices-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.multiple-choice-activity .choice-card {
  padding: 1.5rem;
  border: 2px solid #dee2e6;
  border-radius: 8px;
  background: white;
  cursor: pointer;
  transition: all 0.2s ease;
}

.multiple-choice-activity .choice-card:hover {
  border-color: #2c5aa0;
  box-shadow: 0 4px 12px rgba(44, 90, 160, 0.1);
  transform: translateY(-2px);
}

.multiple-choice-activity .choice-card.selected {
  border-color: #2c5aa0;
  background: #f0f5ff;
}

.multiple-choice-activity .choice-card.correct {
  border-color: #28a745;
  background: #d4edda;
}

.multiple-choice-activity .choice-card.incorrect {
  border-color: #dc3545;
  background: #f8d7da;
}

.multiple-choice-activity .choice-label {
  font-weight: 600;
  color: #2c5aa0;
  margin-right: 0.5rem;
}

.multiple-choice-activity .choice-text {
  font-size: 1.1rem;
  color: #333;
}

.multiple-choice-activity .feedback-section {
  margin-top: 1.5rem;
}

/* === Sentence Completion Activity === */
.sentence-completion-activity {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.sentence-completion-activity .instructions {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 2rem;
  text-align: center;
}

.sentence-completion-activity .sentence-frame {
  background: #f8f9fa;
  padding: 2rem;
  border-radius: 8px;
  border: 2px solid #dee2e6;
  margin-bottom: 2rem;
  min-height: 120px;
}

.sentence-completion-activity .sentence-display {
  font-size: 1.3rem;
  line-height: 1.8;
  color: #333;
  text-align: center;
}

.sentence-completion-activity .blank-space {
  display: inline-block;
  min-width: 120px;
  padding: 0.25rem 0.5rem;
  border-bottom: 3px solid #2c5aa0;
  color: #2c5aa0;
  font-weight: 600;
  margin: 0 0.25rem;
}

.sentence-completion-activity .user-input-area {
  border: 2px solid #2c5aa0;
  border-radius: 4px;
  padding: 0.5rem;
  min-height: 40px;
  font-size: 1.2rem;
  background: white;
  cursor: text;
}

.sentence-completion-activity .user-input-area:empty:before {
  content: attr(data-placeholder);
  color: #999;
}

.sentence-completion-activity .action-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.sentence-completion-activity .attempt-counter {
  text-align: center;
  color: #666;
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* === Sentence Improvement Activity === */
.sentence-improvement-activity {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.sentence-improvement-activity .original-sentence {
  background: #fff3cd;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #ffc107;
  margin-bottom: 2rem;
}

.sentence-improvement-activity .original-sentence h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #856404;
  margin-bottom: 0.5rem;
}

.sentence-improvement-activity .original-sentence p {
  font-size: 1.2rem;
  color: #333;
  margin: 0;
}

.sentence-improvement-activity .improvement-prompt {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 1rem;
}

.sentence-improvement-activity .improvement-textarea {
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  font-size: 1.1rem;
  border: 2px solid #dee2e6;
  border-radius: 8px;
  resize: vertical;
}

.sentence-improvement-activity .improvement-textarea:focus {
  border-color: #2c5aa0;
  outline: none;
  box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

/* === Definition Writing Activity === */
.definition-writing-activity {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.definition-writing-activity .target-word {
  font-size: 2.5rem;
  font-weight: 700;
  color: #2c5aa0;
  text-align: center;
  margin-bottom: 1rem;
  font-family: 'Playfair Display', serif;
}

.definition-writing-activity .instructions {
  font-size: 1.1rem;
  color: #666;
  text-align: center;
  margin-bottom: 2rem;
}

.definition-writing-activity .example-sentence-box {
  background: #f0f5ff;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #2c5aa0;
  margin-bottom: 2rem;
}

.definition-writing-activity .example-sentence-box h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #2c5aa0;
  margin-bottom: 0.5rem;
}

.definition-writing-activity .example-sentence-box p {
  font-size: 1.1rem;
  color: #333;
  margin: 0;
  font-style: italic;
}

.definition-writing-activity .definition-input {
  width: 100%;
  min-height: 100px;
  padding: 1rem;
  font-size: 1.1rem;
  border: 2px solid #dee2e6;
  border-radius: 8px;
  resize: vertical;
  margin-bottom: 1rem;
}

.definition-writing-activity .definition-input:focus {
  border-color: #2c5aa0;
  outline: none;
  box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

/* === Lesson Completion Summary === */
.lesson-completion-summary {
  padding: 2rem 0;
}

.lesson-completion-summary .summary-card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.lesson-completion-summary .celebration-icon {
  font-size: 4rem;
  color: var(--academy-gold, #FFD700);
  animation: bounce 1s ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.lesson-completion-summary .summary-title {
  font-size: 2rem;
  font-weight: 700;
  color: #2c5aa0;
  margin-bottom: 0.5rem;
}

.lesson-completion-summary .summary-subtitle {
  font-size: 1.1rem;
  color: #666;
}

.lesson-completion-summary .stats-section .stat-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1.5rem 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.lesson-completion-summary .stats-section .stat-number {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.lesson-completion-summary .stats-section .stat-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.9;
}

.lesson-completion-summary .feedback-card {
  background: linear-gradient(135deg, #f6f8fb 0%, #e9ecef 100%);
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid var(--academy-red, #800020);
}

.lesson-completion-summary .feedback-message {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #333;
}

.lesson-completion-summary .feedback-message p {
  margin-bottom: 1rem;
}

.lesson-completion-summary .feedback-message p:last-child {
  margin-bottom: 0;
}

.lesson-completion-summary .tip-card {
  background: #fff9e6;
  padding: 1.5rem;
  border-radius: 8px;
  border: 2px solid var(--academy-gold, #FFD700);
}

.lesson-completion-summary .tip-header {
  font-size: 1.1rem;
  color: #856404;
  margin-bottom: 0.75rem;
}

.lesson-completion-summary .tip-header i {
  color: var(--academy-gold, #FFD700);
}

.lesson-completion-summary .tip-content {
  font-size: 1rem;
  color: #555;
  line-height: 1.6;
}

.lesson-completion-summary .encouragement-card {
  background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
  padding: 1.5rem;
  border-radius: 8px;
  text-align: center;
}

.lesson-completion-summary .encouragement-card p {
  font-size: 1.1rem;
  font-weight: 500;
  color: #2e7d32;
  margin: 0;
}

.lesson-completion-summary .complete-lesson-btn {
  font-size: 1.2rem;
  padding: 0.75rem 2rem;
  background: linear-gradient(135deg, var(--academy-red, #800020) 0%, #a00028 100%);
  border: none;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.lesson-completion-summary .complete-lesson-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.lesson-completion-summary .spinner-border {
  border-width: 0.3em;
}

/* Mobile responsiveness for completion summary */
@media (max-width: 768px) {
  .lesson-completion-summary .summary-card {
    padding: 1.5rem;
  }

  .lesson-completion-summary .celebration-icon {
    font-size: 3rem;
  }

  .lesson-completion-summary .summary-title {
    font-size: 1.5rem;
  }

  .lesson-completion-summary .stats-section .stat-number {
    font-size: 1.5rem;
  }
}

/* === Shared/Common Styles === */
.activity-item {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.activity-item.active {
  opacity: 1;
}

.activity-item.completed {
  opacity: 0.7;
}

.feedback-section {
  margin-top: 1.5rem;
}

.feedback-alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

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

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

/* === Mobile Responsiveness === */
@media (max-width: 768px) {
  .word-introduction {
    padding: 1rem 0.5rem;
  }

  .word-introduction .alert-badge {
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
  }

  .word-introduction .word-display-card {
    padding: 2rem 1rem;
  }

  .word-introduction .word-main {
    font-size: 2rem;
  }

  .word-introduction .word-pos,
  .word-introduction .word-pronunciation {
    font-size: 0.875rem;
  }

  .word-introduction .word-speaker .btn {
    font-size: 1.25rem;
  }

  .word-introduction .test-out-card {
    padding: 1.5rem;
  }

  .word-introduction .test-out-icon {
    font-size: 2rem;
  }

  .word-introduction .test-out-title {
    font-size: 1.25rem;
  }

  .word-introduction .test-out-description {
    font-size: 1rem;
  }

  .word-introduction .test-out-buttons {
    flex-direction: column;
  }

  .word-introduction .test-out-buttons button {
    width: 100%;
    min-width: unset;
  }

  .word-introduction .definition-card,
  .word-introduction .example-card {
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
  }

  .word-introduction .card-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }

  .word-introduction .section-title {
    font-size: 1.1rem;
  }

  .word-introduction .definition-text,
  .word-introduction .example-text {
    font-size: 1rem;
  }
}

  .multiple-choice-activity .question-text {
    font-size: 1.3rem;
  }

  .sentence-completion-activity .sentence-display {
    font-size: 1.1rem;
  }

  .definition-writing-activity .target-word {
    font-size: 2rem;
  }

  .lesson-completion-summary .summary-cards {
    grid-template-columns: 1fr;
  }
}

/* === Loading States === */
.activity-loading {
  opacity: 0.6;
  pointer-events: none;
}

.activity-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #2c5aa0;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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