/**
 * Analytics Dashboard Styles
 * Modern design system for learning analytics and insights
 */

/* Analytics Dashboard Container */
.analytics-dashboard {
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 1000;
  font-family: 'Inter', sans-serif;
}

/* Toggle Button */
.analytics-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  padding: 12px 16px;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  font-weight: 500;
}

.analytics-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.analytics-toggle.active {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

.analytics-icon {
  font-size: 20px;
  animation: pulse 2s infinite;
}

.analytics-label {
  font-size: 14px;
  font-weight: 600;
}

/* Analytics Panel */
.analytics-panel {
  position: absolute;
  bottom: 70px;
  left: 0;
  width: 450px;
  max-height: 700px;
  background: var(--background-primary, #ffffff);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color, #e5e7eb);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.analytics-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* Analytics Header */
.analytics-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  border-radius: 16px 16px 0 0;
}

.analytics-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.analytics-close {
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  transition: background-color 0.2s;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* Analytics Content */
.analytics-content {
  max-height: 600px;
  overflow-y: auto;
  padding: 20px;
}

.analytics-section {
  margin-bottom: 24px;
}

.analytics-section:last-child {
  margin-bottom: 0;
}

.analytics-section h4 {
  margin: 0 0 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary, #111827);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Overview Cards */
.analytics-overview {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.overview-card {
  background: var(--background-secondary, #f9fafb);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s;
}

.overview-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.overview-icon {
  font-size: 24px;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.overview-content {
  flex: 1;
}

.overview-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary, #111827);
  line-height: 1;
}

.overview-label {
  font-size: 12px;
  color: var(--text-secondary, #6b7280);
  margin-top: 4px;
}

/* Progress Chart */
.progress-chart-container {
  background: var(--background-secondary, #f9fafb);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

#progress-chart {
  max-width: 100%;
  height: auto;
}

/* Performance Metrics */
.performance-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.metric-card {
  background: var(--background-secondary, #f9fafb);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s;
}

.metric-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.metric-icon {
  font-size: 20px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
}

.metric-content {
  flex: 1;
}

.metric-value {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary, #111827);
  line-height: 1;
}

.metric-label {
  font-size: 12px;
  color: var(--text-secondary, #6b7280);
  margin-top: 2px;
}

/* Learning Insights */
.learning-insights {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.insight-card {
  background: var(--background-secondary, #f9fafb);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: all 0.2s;
}

.insight-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.insight-icon {
  font-size: 20px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  color: white;
  flex-shrink: 0;
}

.insight-content {
  flex: 1;
}

.insight-content h5 {
  margin: 0 0 4px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary, #111827);
}

.insight-content p {
  margin: 0;
  font-size: 13px;
  color: var(--text-secondary, #6b7280);
  line-height: 1.4;
}

/* Achievements Grid */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.achievement-card {
  background: var(--background-secondary, #f9fafb);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s;
  opacity: 0.6;
}

.achievement-card.unlocked {
  opacity: 1;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-color: #f59e0b;
}

.achievement-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.achievement-icon {
  font-size: 24px;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background-tertiary, #f3f4f6);
  color: var(--text-secondary, #6b7280);
}

.achievement-card.unlocked .achievement-icon {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
}

.achievement-content {
  flex: 1;
}

.achievement-content h5 {
  margin: 0 0 4px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary, #111827);
}

.achievement-content p {
  margin: 0;
  font-size: 12px;
  color: var(--text-secondary, #6b7280);
  line-height: 1.3;
}

/* Export Options */
.export-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.export-btn {
  background: var(--background-secondary, #f9fafb);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary, #111827);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.export-btn:hover {
  background: var(--background-tertiary, #f3f4f6);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Loading States */
.loading-skeleton {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.skeleton-card {
  height: 80px;
  background: var(--background-tertiary, #f3f4f6);
  border-radius: 12px;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* Empty and Error States */
.empty-state,
.error-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary, #6b7280);
}

.empty-icon,
.error-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state h5,
.error-state h5 {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary, #111827);
}

.empty-state p,
.error-state p {
  margin: 0;
  font-size: 14px;
}

/* Responsive Design */
@media (max-width: 480px) {
  .analytics-dashboard {
    bottom: 10px;
    left: 10px;
  }
  
  .analytics-panel {
    width: calc(100vw - 20px);
    left: -10px;
    bottom: 60px;
    max-height: 80vh;
  }
  
  .analytics-toggle {
    padding: 10px 12px;
  }
  
  .analytics-label {
    display: none;
  }
  
  .analytics-overview,
  .performance-metrics,
  .achievements-grid {
    grid-template-columns: 1fr;
  }
  
  .analytics-content {
    padding: 16px;
  }
}

/* Dark Mode Support */
[data-theme="dark"] .analytics-panel {
  background: var(--background-primary, #1f2937);
  border-color: var(--border-color, #374151);
}

[data-theme="dark"] .overview-card,
[data-theme="dark"] .metric-card,
[data-theme="dark"] .insight-card,
[data-theme="dark"] .achievement-card {
  background: var(--background-secondary, #374151);
  border-color: var(--border-color, #4b5563);
}

[data-theme="dark"] .progress-chart-container {
  background: var(--background-secondary, #374151);
  border-color: var(--border-color, #4b5563);
}

[data-theme="dark"] .export-btn {
  background: var(--background-secondary, #374151);
  border-color: var(--border-color, #4b5563);
  color: var(--text-primary, #f9fafb);
}

[data-theme="dark"] .export-btn:hover {
  background: var(--background-tertiary, #4b5563);
}

[data-theme="dark"] .skeleton-card {
  background: var(--background-tertiary, #4b5563);
}

/* Accessibility */
.analytics-toggle:focus,
.analytics-close:focus,
.export-btn:focus {
  outline: 2px solid var(--primary-color, #10b981);
  outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .analytics-toggle {
    border: 2px solid currentColor;
  }
  
  .analytics-panel {
    border: 2px solid var(--border-color, #000000);
  }
  
  .overview-card,
  .metric-card,
  .insight-card,
  .achievement-card {
    border-width: 2px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .analytics-toggle,
  .analytics-panel,
  .overview-card,
  .metric-card,
  .insight-card,
  .achievement-card,
  .export-btn {
    transition: none;
  }
  
  .analytics-icon {
    animation: none;
  }
  
  .skeleton-card {
    animation: none;
  }
}