/**
 * Print styles.
 *
 * The reading layout is a fixed-position grid whose article pane is the thing
 * that scrolls (`.main-grid { position: fixed }`, `main { overflow-y: auto }`,
 * and `html, body { overflow: hidden }` from the inline root CSS). That means a
 * page printed without these rules stops after the first sheet — everything
 * below the fold is clipped rather than flowed onto the next page.
 *
 * These rules unwind the layout back into normal document flow, drop the
 * interactive chrome, and open anything collapsed so the printed sheet carries
 * the same content the reader can see on screen.
 */

@media print {
  /* --- Always print light ----------------------------------------------- */

  /* The theme follows the reader's dark-mode preference, but a dark page on
     paper is an ink-flooded sheet with washed-out text. Pin the light palette
     for print regardless of what is on screen. */
  :root {
    color-scheme: light !important;
    --color-background: white !important;
    --color-text: black !important;
    --color-text-deactivated: #242428 !important;
    --color-nav: #f5f5f5 !important;
    --color-nav-border: #3c3c3c !important;
    --color-author-background: #d6d6d6 !important;
    --color-author-color: #3c3c3c !important;
    --color-spacer: #a4a4a4 !important;
  }

  /* Syntax highlighting ships both palettes as custom properties; select the
     light one, matching the rules in light.css. */
  figure[data-rehype-pretty-code-figure] pre,
  code[data-theme*=" "],
  code[data-theme*=" "] span {
    color: var(--shiki-light) !important;
    background-color: var(--shiki-light-bg) !important;
  }

  /* --- Unwind the scroll container ------------------------------------- */

  html,
  body {
    overflow: visible !important;
    height: auto !important;
    width: auto !important;
    margin: 0;
    background: white !important;
  }

  .main-grid {
    position: static !important;
    display: block !important;
    height: auto !important;
    color: black !important;
    background: white !important;
    /* The reading measure is a screen constraint; on paper the page box wins. */
    --main-width: 100% !important;
  }

  main {
    display: block !important;
    overflow: visible !important;
    height: auto !important;
    padding: 0 !important;
  }

  article {
    max-width: none !important;
    width: auto !important;
  }

  @page {
    margin: 2cm;
  }

  /* --- Drop the chrome -------------------------------------------------- */

  header,
  .sidebar,
  .mobile-nav,
  side-drawer,
  .floating-buttons-container,
  .jump-container,
  #custom-links-footer,
  #toc-toggle,
  #search-toggle,
  #search-drawer,
  #qrcode-open,
  #share-button,
  #user-toggle,
  #cloud-sync-notice,
  #hyperbook-dev-reload,
  dark-mode-toggle,
  .bookmark,
  .copy-button,
  .rehype-pretty-copy,
  .lightbox-overlay {
    display: none !important;
  }

  /* Heading permalinks stay as text, but drop the anchor styling. */
  a.heading {
    text-decoration: none !important;
    color: inherit !important;
  }

  /* --- Reveal collapsed content ---------------------------------------- */

  details {
    display: block !important;
  }

  details > * {
    display: block !important;
  }

  details:not([open]) > *:not(summary) {
    display: block !important;
  }

  summary {
    list-style: none;
    font-weight: bold;
  }

  /* Tabs are a CSS-driven radio group, so only the checked panel is visible.
     There is no way to switch tabs on paper, so print every panel. The tab
     strip itself goes: its labels repeat as the panel headings below. */
  .directive-tabs > .tabpanel {
    display: block !important;
  }

  .directive-tabs > .tabs {
    display: none !important;
  }

  /* Slideshows likewise: print every slide rather than only the current one. */
  .directive-slideshow .slideshow .image-container {
    display: block !important;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .directive-slideshow .dots-container,
  .directive-slideshow .prev,
  .directive-slideshow .next {
    display: none !important;
  }

  /* --- Reader-entered content ------------------------------------------ */

  /* A textarea scrolls its overflow instead of growing, so a long written
     answer would print truncated. `initPrintExpansion` in bootstrap.js sets an
     inline height from scrollHeight on beforeprint — deliberately no `height`
     rule here, because an `!important` one would override it. */
  textarea,
  .directive-textinput textarea {
    display: block !important;
    min-height: 6rem;
    overflow: visible !important;
    resize: none;
    border: 1px solid #999 !important;
    background: white !important;
    color: black !important;
    font-family: inherit;
    white-space: pre-wrap;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  /* --- Pagination ------------------------------------------------------- */

  figure,
  pre,
  table,
  blockquote,
  .directive-alert {
    page-break-inside: avoid;
    break-inside: avoid;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    page-break-after: avoid;
    break-after: avoid;
  }

  img,
  svg,
  canvas {
    max-width: 100% !important;
    height: auto !important;
  }

  pre,
  code {
    white-space: pre-wrap !important;
    word-wrap: break-word;
  }

  /* --- Links ------------------------------------------------------------ */

  /* Spell out external targets, which are otherwise lost on paper. Internal
     links are omitted: a book-relative href is meaningless off-screen. */
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.85em;
    word-break: break-all;
  }

  a[href^="http"].heading::after,
  a[href^="http"] img ~ ::after {
    content: none;
  }
}