/*
 * Print-first stylesheet for booklet printing.
 * Print 2 pages per side, duplex, fold in half, staple.
 * Target: 12pt body on A4/Letter.
 */

@media print {
  @page {
    size: letter portrait;
    margin: 15mm 12mm 15mm 15mm;
  }

  @page :left {
    margin-right: 15mm;
    margin-left: 12mm;
  }

  html {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 12pt;
    line-height: 1.55;
    max-width: none;
    margin: 0;
    padding: 0;
    color: #000;
    background: #fff;
  }

  h1 { font-size: 20pt; page-break-before: always; margin-top: 0; }
  h2 { font-size: 16pt; page-break-after: avoid; }
  h3 { font-size: 13pt; page-break-after: avoid; }
  h4, h5, h6 { font-size: 12pt; page-break-after: avoid; }

  h1:first-child { page-break-before: avoid; }

  p, li, td, th, blockquote {
    font-size: 12pt;
    orphans: 3;
    widows: 3;
  }

  pre, code {
    font-family: "SF Mono", Menlo, Monaco, "Courier New", monospace;
    font-size: 9pt;
    background: #f5f5f5;
    color: #000;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }

  pre {
    padding: 8px;
    white-space: pre-wrap;
    word-break: break-all;
  }

  code {
    padding: 1px 4px;
  }

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

  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 10pt;
    page-break-inside: avoid;
  }

  th, td {
    border: 1px solid #000;
    padding: 4px 6px;
  }

  th {
    background: #ddd;
    font-weight: 700;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 8pt;
    color: #555;
  }

  nav, footer, .screen-only, .mermaid-caption {
    display: none;
  }

  .mermaid-diagram {
    max-width: 100%;
    margin: 12pt 0;
    text-align: center;
    page-break-inside: avoid;
  }

  .mermaid-diagram svg {
    max-width: 100%;
    height: auto;
  }

  .mermaid-diagram svg .edgeLabel,
  .mermaid-diagram svg .nodeLabel,
  .mermaid-diagram svg text {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
  }

  .mermaid-error,
  .mermaid-error-msg {
    border: 2px solid #000;
    background: #fff;
    color: #000;
    padding: 8px;
  }

  blockquote {
    border-left: 3px solid #000;
    margin: 8pt 0;
    padding: 4pt 0 4pt 12pt;
    font-style: italic;
  }

  hr {
    border: none;
    border-top: 1px solid #000;
    margin: 12pt 0;
  }

  img {
    max-width: 100%;
    page-break-inside: avoid;
  }

  figure {
    margin: 12pt 0;
    page-break-inside: avoid;
  }

  details {
    page-break-inside: avoid;
  }

  details > summary {
    font-weight: 700;
  }
}