/* ==========================================================================
   MathPix MMD Preview Styles
   Version: 1.0.0
   
   Colour Strategy: Uses currentColor and inherits from parent theme.
   Dark mode styling handled separately.
   ========================================================================== */

/* ==========================================================================
   COLOUR DEFINITIONS
   All colour-related properties consolidated here for easy theming
   ========================================================================== */

.mmd-view-controls {
  border-bottom: 1px solid currentcolor;
}

#mmd-preview-content {
  font-size: 0.85rem;
}

.mmd-view-btn {
  font-size: 0.85rem;
}

.mmd-view-btn.active,
.mmd-view-btn[aria-pressed="true"] {
  background: white;
  color: black;
}

.mmd-preview-container {
  border: 1px solid currentcolor;
}

.mmd-loading-spinner {
  border: 3px solid rgba(128, 128, 128, 0.2);
  border-top-color: currentColor;
}

.mmd-preview-error {
  border: 1px solid rgba(200, 0, 0, 0.3);
  background: rgba(200, 0, 0, 0.05);
}

.mmd-preview-content th,
.mmd-preview-content td {
  border: 1px solid rgba(128, 128, 128, 0.3);
}

.mmd-preview-content th {
  background: rgba(128, 128, 128, 0.05);
}

/* Override MathPix inline table styles for theme compatibility */
.mmd-preview-content table,
.mmd-preview-content .table_tabular,
.mmd-preview-content .inline-tabular,
.mmd-preview-content .inline-tabular table,
.mmd-preview-content .inline-tabular td,
.mmd-preview-content .inline-tabular th {
  background: transparent !important;
  background-color: transparent !important;
  color: inherit !important;
  border-color: transparent !important;
}

/* Force table cell borders to use current colour */
.mmd-preview-content #tabular td,
.mmd-preview-content #tabular th,
.mmd-preview-content .inline-tabular td,
.mmd-preview-content .inline-tabular th {
  border-top-color: currentColor !important;
  border-right-color: currentColor !important;
  border-bottom-color: currentColor !important;
  border-left-color: currentColor !important;
}

/* Ensure MathJax SVGs inherit colour */
.mmd-preview-content mjx-container svg {
  color: inherit;
}

.mmd-preview-content mjx-container svg [stroke="currentColor"] {
  stroke: currentColor;
}

.mmd-preview-content mjx-container svg [fill="currentColor"] {
  fill: currentColor;
}

.mmd-preview-content code {
  background: rgba(128, 128, 128, 0.1);
}

.mmd-preview-content blockquote {
  border-left: 3px solid currentColor;
}

@media (prefers-reduced-motion: reduce) {
  .mmd-loading-spinner {
    border-top-color: transparent;
    border-right-color: currentColor;
  }
}

/* ==========================================================================
   STRUCTURAL STYLES
   Layout, spacing, typography and non-colour properties
   ========================================================================== */

/* --------------------------------------------------------------------------
   View Controls
   -------------------------------------------------------------------------- */

.mmd-view-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  margin-bottom: 0.75rem;
}

.mmd-view-toggle {
  display: flex;
  gap: 0.25rem;
  padding: 0.125rem;
  border-radius: 4px;
}

.mmd-view-btn.active,
.mmd-view-btn[aria-pressed="true"] {
  opacity: 1;
}

.mmd-view-status {
  font-size: 0.75rem;
}

/* --------------------------------------------------------------------------
   Content Area - Supports Split View
   -------------------------------------------------------------------------- */

.mmd-content-area {
  display: flex;
  gap: 1rem;
  min-height: 200px;
  position: relative;
}

/* Single view mode - container takes full width */
.mmd-content-area[data-current-view="code"] .mmd-code-container,
.mmd-content-area[data-current-view="preview"] .mmd-preview-container {
  flex: 1;
  width: 100%;
}

/* Future: Split view mode - 50/50 layout */
.mmd-content-area[data-current-view="split"] {
  /* flex-direction: row; */
}

.mmd-content-area[data-current-view="split"] .mmd-code-container,
.mmd-content-area[data-current-view="split"] .mmd-preview-container {
  flex: 1;
  max-width: 50%;
  min-width: 0;
}

/* --------------------------------------------------------------------------
   View Containers
   -------------------------------------------------------------------------- */

.mmd-view-container {
  display: none;
  flex-direction: column;
  overflow: hidden;
}

.mmd-view-container.active,
.mmd-view-container:not([hidden]) {
  display: flex;
}

/* --------------------------------------------------------------------------
   Code Container
   -------------------------------------------------------------------------- */

.mmd-code-container .mathpix-format-content {
  flex: 1;
  overflow: auto;
}

.mmd-code-container .code-block-wrapper {
  height: 100%;
}

.mmd-code-container pre {
  margin: 0;
  border-radius: 4px;
  max-height: 60vh;
  overflow: auto;
}

/* --------------------------------------------------------------------------
   Preview Container
   -------------------------------------------------------------------------- */

.mmd-preview-container {
  border-radius: 4px;
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Preview States
   -------------------------------------------------------------------------- */

.mmd-preview-state {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  min-height: 200px;
}

.mmd-preview-state:not([hidden]) {
  display: flex;
}

/* Loading State */
.mmd-preview-loading {
  opacity: 0.7;
}

.mmd-loading-spinner {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  margin-bottom: 1rem;
  animation: mmd-spin 0.8s linear infinite;
}

@keyframes mmd-spin {
  to {
    transform: rotate(360deg);
  }
}

.mmd-loading-text {
  margin: 0;
  font-size: 0.875rem;
  opacity: 0.8;
}

/* Error State */
.mmd-preview-error {
  border-radius: 4px;
  margin: 1rem;
  padding: 1.5rem;
}

.mmd-error-icon {
  font-size: 2rem;
  margin: 0 0 0.5rem;
  line-height: 1;
}

.mmd-error-message {
  margin: 0 0 1rem;
  font-size: 0.875rem;
}

.mmd-retry-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

/* --------------------------------------------------------------------------
   Preview Content
   -------------------------------------------------------------------------- */

.mmd-preview-content {
  padding: 1.5rem;
  line-height: 1.6;
  overflow: auto;
  max-height: 60vh;
}

.mmd-preview-content:empty {
  display: none;
}

/* No content message */
.mmd-preview-content .mmd-no-content {
  text-align: center;
  opacity: 0.6;
  font-style: italic;
  padding: 2rem;
}

/* Headings in preview */
.mmd-preview-content h1,
.mmd-preview-content h2,
.mmd-preview-content h3,
.mmd-preview-content h4,
.mmd-preview-content h5,
.mmd-preview-content h6 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.mmd-preview-content h1:first-child,
.mmd-preview-content h2:first-child,
.mmd-preview-content h3:first-child {
  margin-top: 0;
}

/* Paragraphs in preview */
.mmd-preview-content p {
  margin: 0 0 1rem;
}

/* Math in preview */
.mmd-preview-content .math-inline {
  display: inline;
}

.mmd-preview-content .math-display {
  display: block;
  margin: 1rem 0;
  overflow-x: auto;
}

/* Tables in preview */
.mmd-preview-content table {
  border-collapse: collapse;
  margin: 1rem 0;
  width: 100%;
  font-size: 0.9em;
}

.mmd-preview-content th,
.mmd-preview-content td {
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.mmd-preview-content th {
  font-weight: 600;
}

/* Code in preview */
.mmd-preview-content code {
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
}

.mmd-preview-content pre code {
  display: block;
  padding: 1rem;
  overflow-x: auto;
}

/* Lists in preview */
.mmd-preview-content ul,
.mmd-preview-content ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}

.mmd-preview-content li {
  margin-bottom: 0.25rem;
}

/* Blockquotes in preview */
.mmd-preview-content blockquote {
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  opacity: 0.8;
}

/* --------------------------------------------------------------------------
   Reduced Motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .mmd-loading-spinner {
    animation: none;
  }

  .mmd-view-btn,
  .mmd-retry-btn {
    transition: none;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */

@media print {
  .mmd-view-controls {
    display: none;
  }

  .mmd-preview-container,
  .mmd-code-container {
    border: none;
    max-height: none;
  }

  .mmd-preview-content,
  .mmd-code-container pre {
    max-height: none;
    overflow: visible;
  }
}

/* --------------------------------------------------------------------------
   Responsive - Mobile
   -------------------------------------------------------------------------- */

@media (max-width: 640px) {
  .mmd-view-controls {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }

  .mmd-view-toggle {
    width: 100%;
  }

  .mmd-view-btn {
    flex: 1;
    justify-content: center;
  }

  .mmd-view-status {
    align-self: flex-end;
  }

  /* Force single column on mobile even in split mode */
  .mmd-content-area[data-current-view="split"] {
    flex-direction: column;
  }

  .mmd-content-area[data-current-view="split"] .mmd-code-container,
  .mmd-content-area[data-current-view="split"] .mmd-preview-container {
    max-width: 100%;
  }

  .mmd-preview-content {
    padding: 1rem;
  }
}

@media (max-width: 768px) {
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-code-container,
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-preview-container,
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-pdf-container {
    max-width: 100%;
    max-height: 100%;
    min-height: 100%;
  }
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-code-container
    pre,
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-preview-content,
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-pdf-scroll-container {
    max-height: 100%;
  }
  .mmd-content-area[data-current-view="split"] .mmd-code-container pre,
  .mmd-content-area[data-current-view="split"] .mmd-preview-content {
    max-height: 100% !important;
    overflow: auto;
  }
  .mmd-content-area[data-current-view="pdf_split"] .mmd-pdf-scroll-container,
  .mmd-content-area[data-current-view="pdf_split"] .mmd-preview-content {
    max-height: 100% !important;
    overflow: auto;
  }
}
/* --------------------------------------------------------------------------
   Skip Links - Mobile navigation between stacked panels
   -------------------------------------------------------------------------- */
.mmd-skip-links {
  display: none;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.5rem;
  justify-content: center;
  border-top: 1px solid currentColor;
  opacity: 0.3;
}
.mmd-skip-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  text-decoration: none;
  color: inherit;
  border: 1px solid currentColor;
  border-radius: 0.25rem;
  transition: opacity 0.15s ease;
}
.mmd-skip-link:hover,
.mmd-skip-link:focus {
  opacity: 1;
  text-decoration: none;
}
.mmd-skip-link:focus {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}
/* Hide PDF skip link by default */
.mmd-skip-link-pdf {
  display: none;
}
/* Show skip links only on mobile in split/compare modes */
@media (max-width: 768px) {
  /* Show skip links in split view */
  .mmd-content-area[data-current-view="split"] .mmd-skip-links {
    display: flex;
  }
  /* Show skip links in compare view */
  .mmd-content-area[data-current-view="pdf_split"] .mmd-skip-links {
    display: flex;
  }
  /* Show PDF skip link when PDF is visible in split mode */
  .mmd-content-area[data-current-view="split"][data-show-pdf="true"]
    .mmd-skip-link-pdf {
    display: inline-flex;
  }
  /* Show PDF skip link in compare mode */
  .mmd-content-area[data-current-view="pdf_split"] .mmd-skip-link-pdf {
    display: inline-flex;
  }
  /* Hide PDF skip links from PDF container itself */
  .mmd-pdf-container .mmd-skip-link-pdf {
    display: none;
  }
}
/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .mmd-skip-link {
    transition: none;
  }
}
.mmd-skip-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  text-decoration: none;
  color: inherit;
  background: transparent;
  border: 1px solid currentColor;
  border-radius: 0.25rem;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
.mmd-code-container,
.mmd-pdf-container {
  border: 1px solid currentcolor;
  border-radius: 4px;
}

#mmd-code-container pre[class*="language-"] {
  border: 0;
}