@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  --bg: #ffffff;
  --fg: #1a1a2e;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #3b82f6;
  --code-bg: #f1f5f9;
  --heading: #0f172a;
  --link: #2563eb;
  --table-stripe: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-size: 10.5pt;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  max-width: 210mm;
  margin: 0 auto;
  padding: 15mm 20mm;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  color: var(--heading);
  margin-top: 1.8em;
  margin-bottom: 0.5em;
  page-break-after: avoid;
}

h1 {
  font-size: 22pt;
  border-bottom: 3px solid var(--accent);
  padding-bottom: 0.3em;
  margin-top: 0;
}

h2 {
  font-size: 16pt;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2em;
  page-break-before: auto;
}

h3 {
  font-size: 12pt;
}
h4 {
  font-size: 11pt;
}

p {
  margin: 0.6em 0;
}

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

a:hover {
  text-decoration: underline;
}

code {
  font-family: "JetBrains Mono", "Cascadia Code", "Fira Code", monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.9em 1.1em;
  overflow-x: auto;
  font-size: 0.85em;
  line-height: 1.5;
  page-break-inside: avoid;
}

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

blockquote {
  border-left: 4px solid var(--accent);
  margin: 1em 0;
  padding: 0.5em 1em;
  background: #eff6ff;
  border-radius: 0 6px 6px 0;
  color: #1e40af;
  font-size: 0.95em;
}

blockquote p {
  margin: 0.3em 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.9em;
  page-break-inside: avoid;
}

thead {
  background: var(--heading);
  color: white;
}

th {
  padding: 0.55em 0.75em;
  text-align: left;
  font-weight: 600;
  font-size: 0.92em;
}

td {
  padding: 0.45em 0.75em;
  border-bottom: 1px solid var(--border);
}

tbody tr:nth-child(even) {
  background: var(--table-stripe);
}

hr {
  border: none;
  border-top: 2px solid var(--border);
  margin: 2em 0;
}

ul,
ol {
  margin: 0.5em 0;
  padding-left: 1.5em;
}

li {
  margin: 0.25em 0;
}

strong {
  font-weight: 600;
}

/* Table of contents */
nav#TOC {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2em 1.5em;
  margin-bottom: 2em;
}

nav#TOC > ul {
  padding-left: 1em;
}
nav#TOC li {
  margin: 0.15em 0;
}

nav#TOC::before {
  content: "Table of Contents";
  display: block;
  font-weight: 700;
  font-size: 13pt;
  margin-bottom: 0.6em;
  color: var(--heading);
}

/* Print styles */
@media print {
  body {
    padding: 0;
    max-width: none;
  }
  h1 {
    page-break-before: avoid;
  }
  h2 {
    page-break-before: always;
  }
  h2:first-of-type {
    page-break-before: avoid;
  }
  pre,
  table,
  blockquote {
    page-break-inside: avoid;
  }

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