/* Practice Page Styles */

.practice-main {
  padding: 40px 0;
  background: var(--surface-color);
  min-height: calc(100vh - 80px);
}

/* Practice Header */
.practice-header {
  background: linear-gradient(135deg, #fca5a5 0%, #f87171 100%);
  color: white;
  border-radius: 16px;
  padding: 40px;
  margin-bottom: 40px;
}

.header-content-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.practice-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.practice-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
}

.practice-stats {
  display: flex;
  gap: 30px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: #fbbf24;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Filter Section */
.filter-section {
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: 30px;
  margin-bottom: 40px;
}

.filter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.filter-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.filter-reset {
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.filter-reset:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.filter-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 25px;
}

.filter-group {
  display: flex;
  flex-direction: column;
}

.filter-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-option {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 8px 0;
  font-size: 0.9rem;
}

.filter-option input[type="checkbox"] {
  margin-right: 10px;
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.option-text {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.filter-option:hover .option-text {
  color: var(--text-primary);
}

.difficulty-slider {
  position: relative;
}

.slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-color);
  outline: none;
  -webkit-appearance: none;
  margin-bottom: 10px;
}

.slider::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  border: none;
}

.difficulty-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.filter-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-top: 15px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

/* Categories Section */
.categories-section {
  margin-bottom: 40px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 25px;
  color: var(--text-primary);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.category-card {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 25px;
  display: flex;
  gap: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.category-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
  width: 60px;
  text-align: center;
}

.category-info {
  flex: 1;
}

.category-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.category-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 12px;
}

.category-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.question-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.difficulty-tag {
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.difficulty-tag.easy {
  background: #dcfce7;
  color: #166534;
}

.difficulty-tag.medium {
  background: #fef3c7;
  color: #92400e;
}

.difficulty-tag.hard {
  background: #fee2e2;
  color: #991b1b;
}

/* Questions Section */
.questions-section {
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: 30px;
  margin-bottom: 40px;
}

.questions-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.questions-controls {
  display: flex;
  align-items: center;
  gap: 20px;
}

.sort-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sort-controls label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.sort-controls select {
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.9rem;
}

.view-controls {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.view-btn {
  padding: 8px 12px;
  border: none;
  background: white;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s ease;
}

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

.view-btn:hover:not(.active) {
  background: var(--surface-color);
}

/* Questions Grid */
.questions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.question-card {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  background: white;
}

.question-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.question-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.question-type {
  font-size: 0.75rem;
  padding: 2px 6px;
  background: var(--surface-color);
  border-radius: 4px;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 600;
}

.question-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.question-tag {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
  border-radius: 4px;
  font-weight: 500;
}

.question-difficulty {
  font-size: 0.8rem;
  font-weight: 600;
}

.question-text {
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 15px;
  font-size: 0.95rem;
}

.question-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.question-stats {
  display: flex;
  gap: 15px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.practice-btn {
  padding: 6px 12px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.practice-btn:hover {
  background: var(--primary-hover);
}

/* List View */
.questions-grid.list-view {
  grid-template-columns: 1fr;
}

.questions-grid.list-view .question-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 15px 20px;
}

.questions-grid.list-view .question-content {
  flex: 1;
}

.questions-grid.list-view .question-text {
  margin-bottom: 8px;
}

.questions-grid.list-view .question-actions {
  flex-shrink: 0;
}

/* Pagination */
.questions-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.pagination-btn {
  padding: 10px 15px;
  border: 1px solid var(--border-color);
  background: white;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-info {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
}

.modal-content {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  z-index: 1001;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--surface-color);
  color: var(--text-primary);
}

.modal-body {
  padding: 20px;
}

.question-preview {
  margin-bottom: 20px;
}

.question-meta {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

.question-category {
  background: var(--primary-color);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.question-difficulty {
  background: var(--surface-color);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.question-preview .question-text {
  background: var(--surface-color);
  padding: 15px;
  border-radius: 8px;
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.question-tips h4 {
  margin-bottom: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.question-tips ul {
  margin: 0;
  padding-left: 20px;
}

.question-tips li {
  color: var(--text-secondary);
  margin-bottom: 5px;
  font-size: 0.9rem;
}

.modal-actions {
  padding: 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* Practice Session Modal */
.modal-content.practice-session {
  max-width: 800px;
  max-height: 95vh;
}

.session-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
}

.session-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.session-category {
  background: var(--primary-color);
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

.session-timer {
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-color);
}

.session-close {
  padding: 8px 16px;
  background: var(--danger-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
}

.session-content {
  padding: 30px;
}

.current-question {
  text-align: center;
  margin-bottom: 30px;
}

.question-title {
  font-size: 1.3rem;
  color: var(--text-primary);
  line-height: 1.4;
  max-width: 600px;
  margin: 0 auto;
}

.response-area {
  background: var(--surface-color);
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 30px;
  text-align: center;
}

.recording-controls {
  margin-bottom: 25px;
}

.record-btn {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: none;
  background: var(--primary-color);
  color: white;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  font-size: 1rem;
}

.record-btn:hover {
  background: var(--primary-hover);
  transform: scale(1.05);
}

.record-btn.recording {
  background: var(--danger-color);
  animation: pulse 2s infinite;
}

.record-icon {
  font-size: 2rem;
}

.record-text {
  font-size: 0.85rem;
  font-weight: 500;
}

.transcript-area {
  text-align: left;
}

.transcript-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-weight: 500;
}

.transcript-text {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 15px;
  min-height: 100px;
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 0.95rem;
}

.transcript-text:empty::before {
  content: '开始说话，你的回答会在这里显示...';
  color: var(--text-muted);
  font-style: italic;
}

.session-actions {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.session-progress {
  padding: 20px;
  background: var(--surface-color);
  border-top: 1px solid var(--border-color);
}

.progress-bar {
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 3px;
  transition: width 0.3s ease;
}

.progress-text {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .practice-main {
    padding: 20px 0;
  }

  .practice-header {
    padding: 25px 20px;
  }

  .header-content-wrapper {
    flex-direction: column;
    gap: 25px;
    text-align: center;
  }

  .practice-title {
    font-size: 2rem;
  }

  .practice-stats {
    gap: 20px;
  }

  .filter-section,
  .questions-section {
    padding: 20px 15px;
  }

  .filter-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .filter-actions {
    flex-direction: column;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .category-card {
    padding: 20px 15px;
  }

  .questions-header {
    flex-direction: column;
    gap: 15px;
    align-items: stretch;
  }

  .questions-controls {
    justify-content: space-between;
  }

  .questions-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    margin: 10px;
    max-height: calc(100vh - 20px);
  }

  .modal-content.practice-session {
    max-height: calc(100vh - 20px);
  }

  .session-content {
    padding: 20px 15px;
  }

  .record-btn {
    width: 100px;
    height: 100px;
  }
}

@media (max-width: 480px) {
  .practice-title {
    font-size: 1.5rem;
  }

  .practice-stats {
    flex-direction: column;
    gap: 15px;
  }

  .filter-header {
    flex-direction: column;
    gap: 10px;
    align-items: stretch;
  }

  .session-header {
    flex-direction: column;
    gap: 15px;
    align-items: stretch;
  }

  .session-info {
    justify-content: space-between;
  }

  .modal-actions {
    flex-direction: column;
  }

  .session-actions {
    flex-direction: column;
  }
}