/* ===== PRINT-SPECIFIC STYLES ===== */

/* Font Stack - Professional Serif for Print */
.print-view {
  font-family: 'Charter', 'Georgia', 'Palatino Linotype', 'Book Antiqua', 'Palatino', serif;
  font-size: 11pt;
  line-height: 1.45;
  color: #000;
  background: #fff;
}

/* ===== TITLE PAGE ===== */
.title-page {
  page-break-after: always;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0;
}

.title-page h1 {
  margin-bottom: 1in;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.title-page h1 .title-primary {
  display: block;
  font-size: 48pt;
  font-weight: 700;
  margin-bottom: 0.25in;
}

.title-page h1 .title-secondary {
  display: block;
  font-size: 20pt;
  font-weight: 400;
  color: #444;
  line-height: 1.3;
}

.title-page .subtitle {
  font-size: 16pt;
  line-height: 1.5;
  max-width: 10in;
  margin-bottom: 2in;
  font-style: italic;
}

.title-page .metadata {
  font-size: 11pt;
  color: #666;
}

.title-page .metadata p {
  margin: 6pt 0;
}

/* ===== COPYRIGHT PAGE ===== */
.copyright-page {
  page-break-after: always;
  padding: 2in 1.5in;
  font-size: 10pt;
  line-height: 1.6;
}

.copyright-page p {
  margin: 6pt 0;
}

.copyright-page .copyright {
  font-weight: 600;
  margin-bottom: 12pt;
}

.copyright-page .notice {
  margin-top: 18pt;
  font-style: italic;
  color: #666;
}

/* ===== TABLE OF CONTENTS ===== */
.toc-intro {
  margin-bottom: 12pt;
}

.toc-page {
  page-break-after: always;
  padding: 1in 1.25in;
}

.toc-page h2 {
  font-size: 24pt;
  margin-bottom: 24pt;
  text-align: center;
  font-weight: 700;
}

.toc-part {
  margin-bottom: 18pt;
}

.toc-part-title {
  font-size: 12pt;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6pt;
  color: #333;
}

.toc-part-title a {
  text-decoration: none;
  color: #333;
  transition: color 0.2s;
}

.toc-part-title a:hover {
  color: #0066cc;
}

.toc-part ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-part li {
  margin: 4pt 0;
  font-size: 10.5pt;
  line-height: 1.4;
}

.toc-intro a,
.toc-part li a {
  display: flex;
  text-decoration: none;
  color: #000;
  transition: color 0.2s;
}

.toc-intro a:hover,
.toc-part li a:hover {
  color: #0066cc;
}

.toc-part .chapter-num {
  flex-shrink: 0;
  width: 2em;
  font-weight: 600;
}

.toc-part .chapter-title {
  flex: 1;
}

/* ===== PART DIVIDERS ===== */
.part-divider {
  page-break-before: always;
  page-break-after: always;
  min-height: 8in;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.part-divider-title {
  font-size: 36pt;
  font-weight: 300;
  color: #333;
  line-height: 1.2;
}

/* ===== PDF BOOKMARKS (Paged.js CLI) ===== */

/* Book title - Level 1 */
.title-page h1 {
  bookmark-label: "Engineering Intelligence";
  bookmark-level: 1;
  bookmark-state: open;
}

/* Part titles - no longer using h1, so no bookmark needed */

/* Chapter titles - Level 2 */
.chapter-print h1 {
  bookmark-level: 2;
  bookmark-state: closed;
}

/* Section headings in chapters - Level 3 */
.chapter-print h2 {
  bookmark-level: 3;
  bookmark-state: closed;
}

/* ===== CHAPTER STYLING ===== */
.chapter-print {
  page-break-before: always;
  margin-bottom: 0;
}

.chapter-print h1,
.chapter h1 {
  font-size: 24pt;
  font-weight: 700;
  margin-bottom: 36pt;
  margin-top: 72pt;
  page-break-after: avoid;
  line-height: 1.2;
  word-break: normal;
  hyphens: none;
}

.chapter-print h2,
.chapter h2 {
  font-size: 16pt;
  font-weight: 600;
  margin-top: 24pt;
  margin-bottom: 12pt;
  page-break-after: avoid;
  line-height: 1.3;
  word-break: normal;
  hyphens: none;
}

.chapter-print h3,
.chapter h3 {
  font-size: 13pt;
  font-weight: 600;
  margin-top: 18pt;
  margin-bottom: 9pt;
  page-break-after: avoid;
  word-break: normal;
  hyphens: none;
}

.chapter-print p,
.chapter p {
  margin: 9pt 0;
  hyphens: none;
  word-break: normal;
  overflow-wrap: normal;
  orphans: 3;
  widows: 3;
}

.chapter-print p {
  text-align: justify;
}

@media print {
  .chapter p {
    text-align: justify;
  }
}

/* ===== ENGINEERING TAKEAWAY SECTIONS ===== */
.chapter-print h2[id*="engineering-takeaway"],
.chapter h2[id*="engineering-takeaway"] {
  border-top: 2pt solid #333;
  padding-top: 18pt;
  margin-top: 36pt;
}

/* ===== REFERENCES SECTION ===== */
.chapter-print h2[id*="references"],
.chapter h2[id*="references"] {
  border-top: 1pt solid #999;
  padding-top: 18pt;
  margin-top: 36pt;
  page-break-before: avoid;
}

.chapter-print h2[id*="references"] + p,
.chapter h2[id*="references"] + p {
  margin-top: 12pt;
}

.chapter-print h2[id*="references"] ~ p a,
.chapter h2[id*="references"] ~ p a {
  word-wrap: break-word;
}

.chapter-print h2[id*="references"] ~ p a[href^="http"]:after,
.chapter h2[id*="references"] ~ p a[href^="http"]:after {
  content: "";
}

/* ===== CODE BLOCKS ===== */
.chapter-print pre,
.chapter pre {
  font-size: 8.5pt;
  line-height: 1.35;
  padding: 9pt;
  margin: 12pt 0;
  border: 0.5pt solid #ccc;
  background: #f8f8f8 !important;
  page-break-inside: avoid;
  overflow-wrap: break-word;
  white-space: pre-wrap;
}

.chapter-print code,
.chapter code {
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
  font-size: 0.9em;
  background: #f0f0f0;
  padding: 1pt 3pt;
}

.chapter-print pre code,
.chapter pre code {
  background: none;
  padding: 0;
}

/* ===== LISTS ===== */
.chapter-print ul,
.chapter-print ol,
.chapter ul,
.chapter ol {
  margin: 12pt 0;
  padding-left: 24pt;
}

.chapter-print li,
.chapter li {
  margin: 6pt 0;
  orphans: 2;
  widows: 2;
  word-break: normal;
  hyphens: none;
}

/* ===== MATH ===== */
.chapter-print .katex-display,
.chapter .katex-display {
  margin: 18pt 0;
  page-break-inside: avoid;
  font-size: 11pt;
}

.chapter-print .katex,
.chapter .katex {
  font-size: 1em;
}

/* ===== SVG DIAGRAMS ===== */
.chapter-print svg,
.chapter svg {
  max-width: 100%;
  height: auto;
  margin: 18pt auto;
  display: block;
  page-break-inside: avoid;
}

/* ===== LINKS ===== */
.chapter-print a,
.chapter a {
  color: #000;
  text-decoration: none;
  border-bottom: 0.5pt solid #666;
}

.chapter-print i a,
.chapter i a {
  border-bottom: none;
}

/* Print URLs for external links */
.chapter-print a[href^="http"]:after,
.chapter a[href^="http"]:after {
  /*content: " (" attr(href) ")";*/
  font-size: 8pt;
  color: #666;
  word-wrap: break-word;
}

/* ===== BLOCKQUOTES ===== */
.chapter-print blockquote,
.chapter blockquote {
  border-left: 2pt solid #333;
  padding-left: 12pt;
  margin: 12pt 0;
  font-style: italic;
  page-break-inside: avoid;
}

/* ===== TABLES ===== */
.chapter-print table,
.chapter table {
  font-size: 10pt;
  width: 100%;
  margin: 12pt 0;
  border-collapse: collapse;
  page-break-inside: avoid;
}

.chapter-print th,
.chapter-print td,
.chapter th,
.chapter td {
  padding: 6pt;
  border: 0.5pt solid #999;
  text-align: left;
}

.chapter-print th,
.chapter th {
  background: #f0f0f0;
  font-weight: 600;
}

/* ===== HORIZONTAL RULES ===== */
.chapter-print hr,
.chapter hr {
  margin: 24pt 0;
  border: none;
  border-top: 0.5pt solid #999;
}

/* Hide hr before headers */
.chapter hr:has(+ h1),
.chapter hr:has(+ h2),
.chapter hr:has(+ h3),
.chapter hr:has(+ h4),
.chapter-print hr:has(+ h1),
.chapter-print hr:has(+ h2),
.chapter-print hr:has(+ h3),
.chapter-print hr:has(+ h4) {
  display: none !important;
}

.chapter-print p img,
.chapter p img {
  width: 100%;
  height: auto;
}

/* ===== PRINT MEDIA QUERIES ===== */
@media print {
  /* Page setup */
  @page {
    size: B5;  /* 176mm × 250mm */
    margin: 18mm 12mm 16mm 12mm;  /* Slightly adjusted for B5 proportions */

    /* Page numbers in bottom center (Paged.js) */
    @bottom-center {
      content: counter(page);
      font-size: 9pt;
      color: #666;
    }
  }

  /* No page number on title page */
  @page :first {
    @bottom-center {
      content: "";
    }
    margin: 0;  /* Title page needs no margins */
  }

  /* Better running headers for left/right pages (Paged.js) */
  @page :left {
    @top-left {
      content: "Engineering Intelligence";
      font-size: 9pt;
      font-style: italic;
      color: #666;
    }
    @top-right {
      content: counter(page);
      font-size: 9pt;
    }
  }

  @page :right {
    @top-right {
      content: string(chapter-title);
      font-size: 9pt;
      font-style: italic;
      color: #666;
    }
    @top-left {
      content: counter(page);
      font-size: 9pt;
    }
  }

  /* Removed @page :first to ensure consistent margins across all pages */
  /* Body */
  body {
    font-size: 11pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }

  /* Remove screen-only styles */
  .print-view {
    max-width: none;
    padding: 0;
    box-shadow: none;
  }

  /* Title page */
  .title-page {
    page-break-after: always;
  }

  /* Copyright page (show in print) */
  .copyright-page {
    display: block !important;
    page-break-after: always;
  }

  /* TOC */
  .toc-page {
    page-break-after: always;
  }

  /* Part dividers */
  .part-divider {
    page-break-before: always;
    page-break-after: always;
    margin: 0;
  }

  /* Chapters */
  .chapter-print {
    page-break-before: always;
    margin: 0;
  }

  .chapter {
    margin: 0;
  }

  .chapter-print h1 {
    page-break-before: always;
    page-break-after: avoid;
  }

  .chapter h1 {
    page-break-after: avoid;
  }

  .chapter-print h2,
  .chapter-print h3,
  .chapter h2,
  .chapter h3 {
    page-break-after: avoid;
  }

  .chapter-print p,
  .chapter p {
    orphans: 3;
    widows: 3;
  }

  /* Code blocks */
  .chapter-print pre,
  .chapter pre {
    page-break-inside: avoid;
  }

  /* SVG diagrams */
  .chapter-print svg,
  .chapter svg {
    page-break-inside: avoid;
  }

  /* Math */
  .chapter-print .katex-display,
  .chapter .katex-display {
    page-break-inside: avoid;
  }

  /* Links - print URLs */
  .chapter-print a[href^="http"]:after,
  .chapter a[href^="http"]:after {
    /*content: " (" attr(href) ")";*/
  }

  /* Don't print URLs in references section */
  .chapter-print h2[id*="references"] ~ p a[href^="http"]:after,
  .chapter h2[id*="references"] ~ p a[href^="http"]:after {
    content: "";
  }
}

/* ===== RUNNING HEADERS (Limited Browser Support) ===== */
@page :left {
  @top-left {
    content: "Engineering Intelligence";
    font-size: 9pt;
    font-style: italic;
  }
}

@page :right {
  @top-right {
    content: string(chapter-title);
    font-size: 9pt;
    font-style: italic;
  }
}

/* Set chapter title for running header */
.chapter-print h1,
.chapter h1 {
  string-set: chapter-title content();
}

/* ===== OPTIONAL: DROP CAPS ===== */
/* Uncomment to enable drop caps for first paragraph of each chapter */
/*
.chapter-print h1 + h2 + p::first-letter,
.chapter-print h1 + p::first-letter {
  font-size: 3.5em;
  line-height: 0.9;
  float: left;
  margin: 0.05em 0.1em 0 0;
  font-weight: 700;
}
*/