/* =================================================================== */
/*                    Notebook System Styles                           */
/* =================================================================== */

/* --- Index Page Styles --- */
.notebook-header {
  text-align: center;
  margin: 2rem 0 3rem 0;
  padding-top: 1rem;
}

.notebook-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.notebook-header .subtitle {
  font-size: 1rem;
  color: var(--body-color);
  opacity: 0.7;
  font-style: italic;
  margin-top: 0.5rem;
}

.notebook-index {
  max-width: 80ch;
  margin: 0 auto;
  padding: 0 1.25rem 2rem 1.25rem;
}

/* Category Sections */
.category-section {
  margin-bottom: 3rem;
  border-bottom: var(--border-width-thin) solid var(--footnotes-border-color);
  padding-bottom: 2rem;
}

.category-section:last-child {
  border-bottom: none;
}

.category-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  font-variant-caps: small-caps;
  letter-spacing: 0.05em;
  color: var(--link-visited);
}

/* Subcategories */
.subcategory {
  margin-bottom: 2rem;
  margin-left: 1rem;
}

.subcategory-title {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
  opacity: 0.85;
}

/* Post List */
.post-list {
  list-style: none;
  padding-left: 1rem;
  margin: 0;
}

.post-item {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1rem;
}

.post-item::before {
  content: '§';
  position: absolute;
  left: 0;
  color: var(--body-color);
  opacity: 0.3;
  font-size: 0.9em;
}

.post-link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  text-decoration: none;
  color: var(--body-color);
  padding: 0.25rem 0;
  transition: color 0.2s ease;
}

.post-link:hover {
  color: var(--link-visited);
}

.post-link:hover .post-title {
  text-decoration: underline;
}

.post-title {
  flex: 1;
  margin-right: 1rem;
}

.post-meta {
  font-size: 0.85em;
  opacity: 0.6;
  white-space: nowrap;
  font-style: italic;
}

.notebook-footer {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem 1.25rem;
  font-size: 0.9em;
  opacity: 0.7;
  font-style: italic;
}

/* =================================================================== */
/*                    Note Page Two-Column Layout                      */
/* =================================================================== */

/* Override portfolio body constraints for notebook pages */
body:has(.note-container) {
  max-width: none;
  padding: 5.5rem 0 2rem 0;
}

.note-container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 1.25rem 2rem 1.25rem;
}

/* Two-column grid for desktop */
@media (min-width: 1050px) {
  .note-container {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 3rem;
    max-width: 1600px;
    padding: 0 2rem 2rem 2rem;
    margin: 0 auto;
  }
}

@media (min-width: 1400px) {
  .note-container {
    max-width: 1280px;
    padding: 0 3rem 2rem 3rem;
    gap: 4rem;
  }
}

/* Main content column */
.note-content {
  max-width: none;
  min-width: 0;
  width: 100%;
}

/* Note header */
.note-header {
  margin-bottom: 2rem;
  border-bottom: var(--border-width-thin) solid var(--footnotes-border-color);
  padding-bottom: 1.5rem;
}

.note-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.note-meta {
  font-size: 0.9em;
  color: var(--body-color);
  opacity: 0.7;
  margin-top: 0.5rem;
}

.note-meta-item {
  display: inline-block;
  margin-right: 1.5rem;
}

.note-meta-item::before {
  content: '• ';
  margin-right: 0.25rem;
}

.note-meta-item:first-child::before {
  content: '';
  margin-right: 0;
}

/* References sidebar */
.references-sidebar {
  font-size: 0.85rem;
  position: sticky;
  top: 6rem;
  height: fit-content;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  padding: 1rem;
  background-color: var(--pre-bg-color);
  border-radius: 4px;
  scrollbar-width: thin;
}

.references-sidebar::-webkit-scrollbar {
  width: 4px;
}

.references-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.references-sidebar::-webkit-scrollbar-thumb {
  background: var(--footnotes-border-color);
  border-radius: 2px;
}

.references-sidebar h3 {
  font-size: 0.95rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-variant-caps: small-caps;
  letter-spacing: 0.03em;
}

.ref-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.ref-item {
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--footnotes-border-color);
  line-height: 1.4;
}

.ref-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.ref-id {
  font-weight: 600;
  color: var(--link-visited);
  margin-right: 0.25rem;
  font-size: 0.9em;
}

.ref-content {
  display: block;
  margin-top: 0.25rem;
}

.ref-url {
  font-size: 0.8em;
  word-break: break-all;
  opacity: 0.8;
  display: block;
  margin-top: 0.25rem;
}

/* Reference citations in text */
.ref-cite {
  color: var(--link-visited);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9em;
  cursor: pointer;
}

.ref-cite:hover {
  text-decoration: underline;
}

/* Mobile: Stack sidebar below content, then visitor counter */
@media (max-width: 1049px) {
  .note-container {
    display: flex;
    flex-direction: column;
  }

  .references-sidebar {
    position: static;
    max-height: none;
    margin-top: 2rem;
    padding: 1.25rem;
    max-width: 80ch;
    order: 1;
  }

  .note-content {
    max-width: 80ch;
    order: 0;
  }

  /* Visitor counter comes after references on mobile */
  .note-container > .visitor-counter-container {
    order: 2;
    margin-top: 2rem;
    max-width: 80ch;
  }
}

/* =================================================================== */
/*                    Note Content Components                          */
/* =================================================================== */

/* Section numbering */
.note-content {
  counter-reset: section subsection;
}

.note-content h2 {
  counter-increment: section;
  counter-reset: subsection;
}

.note-content h2::before {
  content: counter(section) ". ";
}

.note-content h3 {
  counter-increment: subsection;
}

.note-content h3::before {
  content: counter(section) "." counter(subsection) " ";
}

/* Definition boxes */
.definition-box {
  border-left: 3px solid var(--link-visited);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  background-color: var(--pre-bg-color);
  border-radius: 0 4px 4px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.definition-box .box-title {
  font-weight: 600;
  font-variant-caps: small-caps;
  margin-bottom: 0.5rem;
  color: var(--link-visited);
  letter-spacing: 0.03em;
}

/* Theorem boxes */
.theorem-box {
  border: var(--border-width-thin) solid var(--table-border-color);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.theorem-box .box-title {
  font-weight: 600;
  font-style: italic;
  margin-bottom: 0.5rem;
}

/* Example boxes */
.example-box {
  border-left: 3px solid var(--footnotes-border-color);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  background-color: var(--pre-bg-color);
  border-radius: 0 4px 4px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.example-box .box-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  opacity: 0.85;
}

/* Ensure paragraphs with inline math in boxes can scroll if needed */
.example-box p,
.theorem-box p,
.definition-box p,
.note-box p {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
}

/* Note/Warning boxes */
.note-box {
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  background-color: var(--pre-bg-color);
  border-radius: 4px;
  border: 1px dashed var(--footnotes-border-color);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.note-box .box-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.95em;
}

.note-box .box-title::before {
  content: '⚠ ';
  margin-right: 0.25rem;
}

/* Code blocks with line numbers */
.code-block-container {
  margin: 1.5rem 0;
}

.code-block-header {
  background-color: var(--pre-bg-color);
  padding: 0.5rem 1rem;
  font-size: 0.85em;
  border-radius: 4px 4px 0 0;
  border-bottom: 1px solid var(--footnotes-border-color);
  font-family: Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
}

.code-block-container pre {
  margin: 0;
  border-radius: 0 0 4px 4px;
}

/* Inline math */
.math-inline {
  font-family: 'Latin Modern', Georgia, serif;
  font-style: italic;
}

/* Display math */
.math-display {
  overflow-x: auto;
  overflow-y: hidden;
  margin: 1.5rem 0;
  padding: 1rem 0;
  text-align: center;
  -webkit-overflow-scrolling: touch;
}

/* Math displays inside boxes - ensure they don't overflow on mobile */
.example-box .math-display,
.theorem-box .math-display,
.definition-box .math-display,
.note-box .math-display {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Ensure MathJax rendered content is scrollable */
.example-box mjx-container,
.theorem-box mjx-container,
.definition-box mjx-container,
.note-box mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

/* For inline MathJax that might be too wide */
mjx-container[display="true"] {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

/* Image figures */
.note-figure {
  margin: 2rem 0;
  text-align: center;
}

.note-figure img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  border: var(--border-width-thin) solid var(--footnotes-border-color);
}

.note-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.9em;
  font-style: italic;
  opacity: 0.8;
  text-align: center;
}

/* PDF Download Icon */
.pdf-download-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 1rem;
  padding: 0.5rem;
  color: #666;
  opacity: 0.6;
  transition: all 0.2s ease;
  text-decoration: none;
  border-radius: 4px;
}

.pdf-download-icon:hover {
  opacity: 1;
  color: #333;
  background-color: rgba(0, 0, 0, 0.05);
  transform: translateY(-1px);
}

.pdf-download-icon svg {
  display: block;
}

/* Breadcrumb navigation */
.breadcrumb {
  font-size: 0.85em;
  margin-bottom: 1rem;
  opacity: 0.7;
}

.breadcrumb a {
  text-decoration: none;
  color: var(--body-color);
}

.breadcrumb a:hover {
  text-decoration: underline;
  color: var(--link-visited);
}

.breadcrumb-separator {
  margin: 0 0.5rem;
}

/* Back to index link */
.back-link {
  display: inline-block;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: var(--border-width-thin) solid var(--footnotes-border-color);
  font-size: 0.9em;
  text-decoration: none;
  color: var(--link-visited);
}

.back-link::before {
  content: '← ';
  margin-right: 0.25rem;
}

.back-link:hover {
  text-decoration: underline;
}

/* Responsive typography for notes */
@media (max-width: 600px) {
  .note-title {
    font-size: 1.75rem;
  }

  .note-content h2 {
    font-size: 1.4rem;
  }

  .note-content h3 {
    font-size: 1.2rem;
  }

  /* Make tables scrollable on mobile to match other components */
  .note-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Reduce padding on boxes for mobile */
  .definition-box,
  .theorem-box,
  .example-box,
  .note-box {
    padding: 0.75rem 1rem;
    margin: 1rem 0;
  }

  /* Reduce code block padding */
  .code-block-container pre {
    padding: 0.75rem 1rem;
  }

  .code-block-header {
    padding: 0.5rem 0.75rem;
  }
}

/* Additional mobile fixes for very small screens */
@media (max-width: 480px) {
  /* Match the reduced padding from style.css */
  .note-container {
    padding: 0 1rem 2rem 1rem;
  }

  .references-sidebar {
    padding: 1rem;
  }
}