/* =============================================================
   Academic writeup — MacroBase-style AML pipeline
   ============================================================= */

:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #64748b;
  --navy: #1e3a8a;
  --navy-dark: #0f1e4a;
  --crimson: #b91c1c;
  --forest: #065f46;
  --rule: #e2e8f0;
  --code-bg: #f4f4f5;
  --table-alt: #fafafa;
  --max-width: 860px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Charter", "Source Serif Pro", "Iowan Old Style",
    "Apple Garamond", "Palatino Linotype", Georgia, serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 72px 0 0 0;
}

.site-title {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    system-ui, sans-serif;
  font-size: 38px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--navy-dark);
  margin: 0 0 8px 0;
  letter-spacing: -0.01em;
}

.site-title .subtitle {
  display: block;
  font-size: 22px;
  font-weight: 500;
  color: var(--navy);
  margin-top: 6px;
}

.byline {
  color: var(--muted);
  margin: 0 0 40px 0;
  font-family: "Inter", sans-serif;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---------- Nav bar ---------- */

.site-nav {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
  font-family: "Inter", sans-serif;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.site-nav a:hover {
  color: var(--navy);
  border-bottom-color: var(--navy);
}

/* ---------- Sections ---------- */

main.wrap {
  padding-top: 48px;
  padding-bottom: 96px;
}

section {
  margin-bottom: 64px;
  scroll-margin-top: 80px;
}

h2 {
  font-family: "Inter", sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--navy-dark);
  margin: 0 0 20px 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--navy-dark);
  letter-spacing: -0.01em;
}

h3 {
  font-family: "Inter", sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--navy-dark);
  margin: 32px 0 12px 0;
}

h4 {
  font-family: "Inter", sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy);
  margin: 22px 0 8px 0;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 16px 0;
}

ul,
ol {
  margin: 0 0 16px 0;
  padding-left: 24px;
}

ul li,
ol li {
  margin-bottom: 6px;
}

strong {
  color: var(--navy-dark);
  font-weight: 600;
}

em {
  color: #2d3142;
}

a {
  color: var(--navy);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--crimson);
}

/* ---------- Code ---------- */

code {
  font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
  color: #0f172a;
}

.formula {
  font-family: "JetBrains Mono", monospace;
  background: var(--code-bg);
  padding: 14px 18px;
  border-left: 3px solid var(--navy);
  border-radius: 0 4px 4px 0;
  margin: 18px 0;
  font-size: 15px;
}

/* ---------- Stat grid (dataset section) ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 24px 0;
  padding: 20px;
  background: #f8fafc;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.stat {
  text-align: center;
}

.stat-num {
  font-family: "Inter", sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--navy-dark);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.stat-lbl {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}

/* ---------- Tables ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-family: "Inter", sans-serif;
  font-size: 14px;
}

table caption {
  caption-side: top;
  text-align: left;
  padding: 8px 0;
  font-style: italic;
  color: var(--muted);
  font-size: 13px;
  font-family: "Charter", Georgia, serif;
}

th,
td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--navy-dark);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--navy-dark);
}

.results-table tbody tr:nth-child(even) {
  background: var(--table-alt);
}

.results-table tr.primary {
  background: #fef3c7 !important;
}

.results-table tr.primary td {
  font-weight: 500;
}

td.num,
th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.table-wrap {
  overflow-x: auto;
  margin: 18px 0;
}

/* ---------- Figures ---------- */

figure {
  margin: 24px 0;
  padding: 24px 20px 16px 20px;
  background: #f8fafc;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

figure svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  font-family: "Inter", sans-serif;
}

figcaption {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  font-style: italic;
  color: var(--muted);
  line-height: 1.5;
  font-family: "Charter", Georgia, serif;
}

figcaption strong {
  color: var(--navy-dark);
  font-style: normal;
}

/* ---------- References ---------- */

.references {
  padding-left: 28px;
}

.references li {
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.5;
}

.references em {
  color: var(--navy-dark);
}

/* ---------- Footer ---------- */

footer {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: "Inter", sans-serif;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

footer p {
  margin: 4px 0;
}

/* ---------- Responsive ---------- */

/* ---------- Print ---------- */

@media print {
  .site-nav,
  footer {
    display: none;
  }

  body {
    font-size: 11pt;
    line-height: 1.5;
    color: #000;
  }

  .wrap {
    max-width: 100%;
    padding: 0;
  }

  .site-header {
    border-bottom: 2px solid #000;
    padding-top: 0;
  }

  h2 {
    page-break-after: avoid;
    border-bottom-color: #000;
  }

  h3, h4 {
    page-break-after: avoid;
  }

  table, figure {
    page-break-inside: avoid;
  }

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

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #555;
    word-break: break-all;
  }

  .site-nav a[href]::after,
  .nav-wrap a[href]::after {
    content: none;
  }

  figure {
    background: #fff;
    border: 1px solid #ccc;
  }

  .results-table tr.primary {
    background: #eee !important;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header {
    padding-top: 48px;
  }

  .site-title {
    font-size: 28px;
  }

  .site-title .subtitle {
    font-size: 17px;
  }

  h2 {
    font-size: 22px;
  }

  h3 {
    font-size: 17px;
  }

  .nav-wrap {
    gap: 4px 16px;
    font-size: 11px;
  }
}