/* MathPix PDF Preview Styling - Phase 3.4 */
/* Accessible, theme-aware styling with WCAG 2.2 AA compliance */

/* ==========================================
   COLOUR PROPERTIES
   ========================================== */

/* Upload Preview Colours */
.mathpix-upload-preview {
  background: #e1e8ec;
  border: 2px dashed #00131d;
}

.upload-preview-display {
  border: 1px solid #e1e8ec;
  background: #e1e8ec;
}

#upload-preview-canvas {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Main PDF Preview Colours */
.mathpix-pdf-preview {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
}

.pdf-preview-display {
  border: 1px solid #dee2e6;
  background: #ffffff;
}

#pdf-preview-canvas {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Statistics Panel Colours */
.pdf-preview-stats {
  background: rgba(255, 255, 255, 0.8);
  border-left: 4px solid #0d6efd;
}

.pdf-preview-stats h3 {
  color: #212529;
}

.pdf-content-summary dt {
  color: #6c757d;
}

.pdf-content-summary dd {
  color: #212529;
}

/* Navigation Controls Colours */
.pdf-nav-button {
  background: #ffffff;
  border: 1px solid #dee2e6;
  color: #212529;
}

.pdf-nav-button:hover:not(:disabled) {
  background: #e9ecef;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.pdf-nav-button:disabled {
  background: #f8f9fa;
}

.pdf-nav-button:focus-visible {
  outline: 3px solid #0d6efd;
}

/* Legend Colours */
.pdf-preview-legend {
  background: rgba(255, 255, 255, 0.8);
}

.pdf-preview-legend h4 {
  color: #212529;
}

.legend-math {
  color: #3b82f6;
}

.legend-handwritten {
  color: #22c55e;
}

.legend-table {
  color: #f97316;
}

.legend-diagram {
  color: #a855f7;
}

.legend-low-confidence {
  color: #eab308;
}

/* Action Buttons Colours */

/* Page Navigation with Integrated Statistics */
.mathpix-page-navigation {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
}

.mathpix-nav-button {
  background: #0066cc;
  color: white;
}

.mathpix-nav-button:hover:not(:disabled) {
  background: #0052a3;
}

/* Page Statistics Panel */
.mathpix-page-statistics {
  background: rgba(59, 130, 246, 0.05);
  border: 1px solid rgba(59, 130, 246, 0.15);
}

.stats-heading {
  color: #666;
}

.page-content-summary dt {
  color: #666;
}

.page-content-summary dd {
  color: #333;
  background: white;
}

/* Simplified PDF Preview */
.pdf-preview-description {
  color: #666;
}

.pdf-preview-display {
  background: #f5f5f5;
}

#pdf-preview-canvas {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.pdf-preview-controls {
  background: #f8f9fa;
}

.zoom-indicator {
  color: #666;
}

/* ==========================================
   LAYOUT & NON-COLOUR PROPERTIES
   ========================================== */
/* Ensure hidden attribute works correctly - MUST come first */
.mathpix-upload-preview[hidden],
#mathpix-pdf-preview-container[hidden] {
  display: none !important;
}

/* Upload Preview Styles */
.mathpix-upload-preview {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  margin-top: 1rem;
  transform: translateY(0);
  transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
}

/* Only apply animations if user hasn't requested reduced motion */
@media (prefers-reduced-motion: no-preference) {
  .mathpix-upload-preview {
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
  }

  /* Animate entrance when shown */
  .mathpix-upload-preview.entering {
    animation: slideIn 0.3s ease-out;
  }

  /* Animate exit when hidden */
  .mathpix-upload-preview.exiting {
    opacity: 0;
    transform: translateY(-10px);
  }

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

.mathpix-upload-preview h3 {
  margin: 0 0 1rem 0;
  font-size: 1.25rem;
}

.upload-preview-display {
  position: relative;
  overflow: auto;
  border-radius: 4px;
  max-height: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

#upload-preview-canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.upload-preview-info {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  margin: 0;
  padding: 1rem;
  border-radius: 4px;
}

.upload-preview-info dt {
  font-weight: 600;
}

.upload-preview-info dd {
  margin: 0;
}

.upload-preview-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.primary-button {
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
  font-size: 1rem;
}

.primary-button:hover {
  transform: translateY(-1px);
}

.primary-button:focus-visible {
  outline-offset: 2px;
}

.secondary-button {
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 1rem;
}

.secondary-button:focus-visible {
  outline-offset: 2px;
}

/* Main PDF Preview Styles */
.mathpix-pdf-preview {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  border-radius: 8px;
}

.pdf-preview-display {
  position: relative;
  overflow: auto;
  border-radius: 4px;
  padding: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

#pdf-preview-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  cursor: default;
}

/* Statistics Panel */
.pdf-preview-stats {
  padding: 1rem;
  border-radius: 4px;
}

.pdf-preview-stats h3 {
  margin: 0 0 1rem 0;
  font-size: 1.125rem;
}

.pdf-content-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  margin: 0;
}

.pdf-content-summary dt {
  font-weight: 600;
}

.pdf-content-summary dd {
  margin: 0;
}

.pdf-content-summary meter {
  width: 100%;
  height: 1.5rem;
}

/* Navigation Controls */
.pdf-preview-navigation {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.pdf-nav-button {
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.9375rem;
}

.pdf-nav-button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.pdf-nav-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pdf-nav-button:focus-visible {
  outline-offset: 2px;
}

/* Legend */
.pdf-preview-legend {
  padding: 1rem;
  border-radius: 4px;
}

.pdf-preview-legend h4 {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
}

.pdf-preview-legend ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.pdf-preview-legend li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
}

.legend-math,
.legend-handwritten,
.legend-table,
.legend-diagram,
.legend-low-confidence {
  font-size: 1.25rem;
}

/* Action Buttons */
.pdf-preview-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.action-button {
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.9375rem;
}

.action-button:hover {
  transform: translateY(-1px);
}

.action-button:focus-visible {
  outline-offset: 2px;
}

/* Page Navigation with Integrated Statistics */
.mathpix-page-navigation {
  margin: 2rem 0;
  padding: 1.5rem;
  border-radius: 8px;
}

.mathpix-page-nav-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.mathpix-nav-button {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.2s;
}

.mathpix-nav-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.mathpix-page-info {
  font-size: 1.1em;
  font-weight: 500;
}

/* Page Statistics Panel */
.mathpix-page-statistics {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 6px;
}

.stats-heading {
  margin: 0 0 0.75rem 0;
  font-size: 0.95em;
  font-weight: 600;
}

.page-content-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 0;
  font-size: 0.9em;
}

.stat-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.page-content-summary dt {
  font-weight: 600;
  margin: 0;
}

.page-content-summary dd {
  margin: 0;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  min-width: 2rem;
  text-align: center;
}

/* Simplified PDF Preview */
.pdf-preview-header {
  text-align: center;
  margin-bottom: 1rem;
}

.pdf-preview-header h3 {
  margin: 0 0 0.5rem 0;
}

.pdf-preview-description {
  margin: 0;
  font-size: 0.9em;
}

.pdf-preview-display {
  text-align: center;
  margin: 1.5rem 0;
  padding: 1rem;
  border-radius: 8px;
  overflow: auto;
}

#pdf-preview-canvas {
  max-width: 100%;
  height: auto;
}

.pdf-preview-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: 6px;
}

.zoom-indicator {
  min-width: 80px;
  text-align: center;
  font-weight: 500;
  font-size: 0.95em;
}

/* Hide removed overlay elements */
#pdf-preview-overlay-canvas,
.pdf-preview-legend,
.pdf-preview-stats,
.pdf-preview-navigation,
#pdf-preview-toggle-overlays {
  display: none !important;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .pdf-preview-navigation {
    flex-direction: column;
  }

  .pdf-nav-button {
    width: 100%;
  }

  .upload-preview-actions {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .pdf-preview-legend ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Print Styles */
@media print {
  .mathpix-upload-preview,
  .pdf-preview-navigation,
  .pdf-preview-actions,
  .pdf-preview-legend {
    display: none;
  }

  .pdf-preview-display {
    border: none;
    box-shadow: none;
    page-break-inside: avoid;
  }
}