/**
 * Print Stylesheet for Physics Book
 * Optimizes the book layout for PDF generation and printing
 */

@media print {
  /* ========================================
     Page Setup
     ======================================== */

  @page {
    size: letter;
    margin: 0.75in;
  }

  @page :first {
    margin-top: 1in;
  }

  /* ========================================
     Hide Non-Essential Elements
     ======================================== */

  /* Navigation and UI elements */
  nav,
  .navigation,
  .nav,
  .sidebar,
  .menu,
  .toc-toggle,
  .book-search,
  .gitbook-link,
  #gitbook-toolbar,
  .toolbar,
  .book-menu-btn,
  .font-settings,
  .pull-right,
  .dropdown,
  .social-share,
  .comments,
  .footer-links,
  .edit-link,
  .btn-group,
  header nav,
  footer nav {
    display: none !important;
  }

  /* Service worker and PWA elements */
  .pwa-install,
  .offline-indicator,
  .update-notification {
    display: none !important;
  }

  /* ========================================
     Layout Adjustments
     ======================================== */

  /* Make content full width */
  body {
    background: white !important;
    color: black !important;
    font-size: 11pt;
    line-height: 1.5;
  }

  .book,
  .book-body,
  .body-inner,
  .page-wrapper,
  .page-inner,
  .markdown-section,
  main,
  article,
  .content {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    float: none !important;
    position: static !important;
    overflow: visible !important;
  }

  .book-summary,
  .book-header {
    display: none !important;
  }

  /* ========================================
     Typography
     ======================================== */

  h1 {
    font-size: 24pt;
    page-break-before: always;
    page-break-after: avoid;
    margin-top: 0;
  }

  h1:first-of-type {
    page-break-before: avoid;
  }

  h2 {
    font-size: 18pt;
    page-break-after: avoid;
  }

  h3 {
    font-size: 14pt;
    page-break-after: avoid;
  }

  h4, h5, h6 {
    font-size: 12pt;
    page-break-after: avoid;
  }

  /* Prevent headings at bottom of page */
  h1, h2, h3, h4, h5, h6 {
    page-break-inside: avoid;
    orphans: 3;
    widows: 3;
  }

  p {
    orphans: 3;
    widows: 3;
  }

  /* ========================================
     Links
     ======================================== */

  a {
    color: black !important;
    text-decoration: underline;
  }

  /* Show URL for external links */
  a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
    word-break: break-all;
  }

  /* Don't show URL for internal links */
  a[href^="#"]:after,
  a[href^="/"]:after,
  a[href^="./"]:after,
  a[href^="../"]:after {
    content: "";
  }

  /* Don't show URL in navigation */
  nav a:after,
  .toc a:after {
    content: "" !important;
  }

  /* ========================================
     Images and Figures
     ======================================== */

  img {
    max-width: 100% !important;
    height: auto !important;
    page-break-inside: avoid;
  }

  figure {
    page-break-inside: avoid;
    margin: 1em 0;
  }

  figcaption {
    font-size: 0.9em;
    font-style: italic;
    text-align: center;
    margin-top: 0.5em;
  }

  /* ========================================
     Tables
     ======================================== */

  table {
    border-collapse: collapse;
    width: 100%;
    page-break-inside: avoid;
    margin: 1em 0;
  }

  thead {
    display: table-header-group;
  }

  tr {
    page-break-inside: avoid;
  }

  th, td {
    border: 1px solid #333;
    padding: 8px;
    text-align: left;
  }

  th {
    background-color: #f0f0f0 !important;
    font-weight: bold;
  }

  /* ========================================
     Code Blocks
     ======================================== */

  pre, code {
    font-family: "Courier New", Courier, monospace;
    font-size: 10pt;
    background-color: #f5f5f5 !important;
    border: 1px solid #ddd;
  }

  pre {
    padding: 10px;
    page-break-inside: avoid;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
  }

  code {
    padding: 2px 4px;
  }

  pre code {
    border: none;
    padding: 0;
  }

  /* ========================================
     Math (MathJax)
     ======================================== */

  .MathJax,
  .MathJax_Display,
  mjx-container,
  .math,
  .katex,
  .katex-display {
    page-break-inside: avoid !important;
  }

  /* Ensure math displays properly */
  .MathJax_Display,
  mjx-container[display="true"],
  .katex-display {
    margin: 1em 0 !important;
    overflow-x: visible !important;
  }

  /* ========================================
     Blockquotes and Special Boxes
     ======================================== */

  blockquote {
    border-left: 3px solid #333;
    margin: 1em 0;
    padding: 0.5em 1em;
    background-color: #f9f9f9 !important;
    page-break-inside: avoid;
  }

  /* Example boxes */
  .example,
  .worked-example {
    border: 2px solid #333;
    padding: 1em;
    margin: 1em 0;
    page-break-inside: avoid;
    background-color: #fafafa !important;
  }

  .example-title,
  .example h4:first-child {
    font-weight: bold;
    margin-bottom: 0.5em;
  }

  /* Note/Warning/Info boxes */
  .note,
  .warning,
  .info,
  .tip,
  .important {
    border: 1px solid #333;
    padding: 1em;
    margin: 1em 0;
    page-break-inside: avoid;
  }

  .note {
    background-color: #e7f3ff !important;
    border-color: #0066cc;
  }

  .warning {
    background-color: #fff3e0 !important;
    border-color: #ff9800;
  }

  .info {
    background-color: #e8f5e9 !important;
    border-color: #4caf50;
  }

  /* ========================================
     Lists
     ======================================== */

  ul, ol {
    page-break-inside: avoid;
  }

  li {
    page-break-inside: avoid;
  }

  /* Definition lists */
  dl {
    page-break-inside: avoid;
  }

  dt {
    font-weight: bold;
    margin-top: 0.5em;
  }

  dd {
    margin-left: 2em;
    margin-bottom: 0.5em;
  }

  /* ========================================
     Physics-Specific Elements
     ======================================== */

  /* Equations that should stay together */
  .equation,
  .formula {
    page-break-inside: avoid;
    margin: 1em 0;
  }

  /* Problem sets */
  .problems,
  .exercises {
    page-break-before: always;
  }

  .problem,
  .exercise {
    page-break-inside: avoid;
    margin: 1em 0;
    padding: 0.5em 0;
    border-bottom: 1px dotted #ccc;
  }

  /* Concept checks */
  .concept-check,
  .check-understanding {
    border: 1px dashed #666;
    padding: 1em;
    margin: 1em 0;
    page-break-inside: avoid;
  }

  /* Section summaries */
  .summary,
  .section-summary {
    background-color: #f5f5f5 !important;
    border: 1px solid #ddd;
    padding: 1em;
    margin: 1em 0;
    page-break-inside: avoid;
  }

  /* Glossary terms */
  .glossary-term {
    font-weight: bold;
  }

  .glossary-definition {
    margin-left: 1em;
  }

  /* ========================================
     Chapter/Section Headers
     ======================================== */

  .chapter-header {
    page-break-before: always;
    text-align: center;
    margin-bottom: 2em;
  }

  .chapter-number {
    font-size: 48pt;
    color: #333;
  }

  .chapter-title {
    font-size: 24pt;
    margin-top: 0.5em;
  }

  /* ========================================
     Utility Classes
     ======================================== */

  .no-print {
    display: none !important;
  }

  .print-only {
    display: block !important;
  }

  .page-break-before {
    page-break-before: always;
  }

  .page-break-after {
    page-break-after: always;
  }

  .avoid-break {
    page-break-inside: avoid;
  }
}

/* Hide print-only elements on screen */
@media screen {
  .print-only {
    display: none !important;
  }
}