/*
 * pdf-tools default stylesheet (Crewly, MIT).
 *
 * Clean A4 document typography with CJK-first font stacks: PingFang /
 * Hiragino on macOS, Noto Sans/Serif CJK (fonts-noto-cjk) on Linux,
 * Microsoft YaHei on Windows. Used for Markdown input; HTML input keeps its
 * own styling unless `addDefaultStyle` is set.
 *
 * Page helpers: <div class="page-break"></div> starts a new page;
 * class="keep-together" avoids splitting a block across pages.
 */

@page {
  size: A4;
  margin: 18mm 16mm 20mm 16mm;
}

:root {
  --text: #1f2328;
  --muted: #57606a;
  --accent: #2f6feb;
  --rule: #d8dee4;
  --code-bg: #f3f4f6;
  --table-head: #f0f3f6;
  --zebra: #fafbfc;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Noto Sans SC", "Source Han Sans SC",
    "Microsoft YaHei", "WenQuanYi Micro Hei", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --serif: "Songti SC", "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --mono: "SF Mono", Menlo, "JetBrains Mono", "Noto Sans Mono CJK SC", Consolas, monospace;
}

html {
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

body {
  font-family: var(--sans);
  font-size: 10.5pt;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
  text-align: justify;
  word-break: normal;
  overflow-wrap: anywhere;
}

main.doc {
  max-width: 100%;
}

h1, h2, h3, h4, h5 {
  font-family: var(--sans);
  font-weight: 650;
  line-height: 1.35;
  color: #111;
  break-after: avoid;
  page-break-after: avoid;
}

h1 {
  font-size: 20pt;
  margin: 0 0 10pt;
  padding-bottom: 6pt;
  border-bottom: 2px solid var(--text);
}

h2 {
  font-size: 14.5pt;
  margin: 18pt 0 8pt;
  padding-bottom: 3pt;
  border-bottom: 1px solid var(--rule);
}

h3 { font-size: 12pt; margin: 14pt 0 6pt; }
h4 { font-size: 10.5pt; margin: 12pt 0 4pt; color: var(--muted); }

p { margin: 0 0 8pt; }

a { color: var(--accent); text-decoration: none; }

ul, ol { margin: 0 0 8pt; padding-left: 18pt; }
li { margin: 2pt 0; }

blockquote {
  margin: 10pt 0;
  padding: 6pt 12pt;
  border-left: 3px solid var(--accent);
  background: #f5f8ff;
  color: #333;
}

blockquote > :last-child { margin-bottom: 0; }

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 1pt 4pt;
  border-radius: 3px;
}

pre {
  font-family: var(--mono);
  font-size: 8.5pt;
  line-height: 1.5;
  background: var(--code-bg);
  padding: 8pt 10pt;
  border-radius: 4px;
  white-space: pre-wrap;
  break-inside: avoid;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 10pt 0;
  font-size: 9.5pt;
  break-inside: auto;
}

th, td {
  border: 1px solid var(--rule);
  padding: 4pt 7pt;
  text-align: left;
  vertical-align: top;
}

th { background: var(--table-head); font-weight: 600; }
tr:nth-child(even) td { background: var(--zebra); }
thead { display: table-header-group; }
tr { break-inside: avoid; }

img { max-width: 100%; }

hr { border: none; border-top: 1px solid var(--rule); margin: 16pt 0; }

.page-break { break-after: page; page-break-after: always; }
.keep-together { break-inside: avoid; page-break-inside: avoid; }
.muted { color: var(--muted); }
.serif { font-family: var(--serif); }