:root {
  --surface: #f8f9fa;
  --surface-low: #f3f4f5;
  --surface-card: #ffffff;
  --surface-high: #e7e8e9;
  --primary: #00081e;
  --primary-2: #0a1f44;
  --ink: #191c1d;
  --muted: #44464e;
  --secondary: #5f5e5e;
  --outline: #c5c6cf;
  --outline-strong: #75777f;
  --accent: #e9c176;
  --positive: #527252;
  --negative: #9c5240;
  --amber: #b8915a;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  /* Manrope covers Cyrillic; Hanken has Latin only in self-hosted subsets */
  font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
  line-height: 1.5;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.16em; }
.article-cta a, .hero-cta { border: 0; background: var(--primary); color: #fff; padding: 14px 22px; font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
.article-shell { max-width: 1280px; margin: 0 auto; padding: 0 64px; }
.article-hero { padding: 72px 0 48px; border-bottom: 1px solid var(--outline); display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(360px, .72fr); gap: 56px; align-items: end; }
.eyebrow { font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--outline-strong); margin: 0 0 18px; }
.breadcrumb a {
  color: var(--outline-strong);
  text-decoration: none;
  transition: color 0.2s ease;
  cursor: pointer;
}
.breadcrumb a:hover {
  color: var(--primary);
  text-decoration: underline;
}
/* Same stack as /services/ font-display-lg — do NOT force PT Serif (looks like Times) */
h1, h2, h3 { color: var(--primary); font-family: 'Libre Caslon Text', serif; font-weight: 400; }
/* In-article headings only; hero/index h1 sizes come from Tailwind (match /services/) */
.article-body h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; margin: 0 0 24px; letter-spacing: -0.02em; }
.article-body h2, .index-card h2 { font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.25; }
.article-body h2 { margin: 72px 0 24px; }
.article-body h3 { font-size: 1.625rem; line-height: 1.3; margin: 40px 0 16px; }
.article-hero h1, .index-hero h1 { margin: 0 0 1.5rem; }
.lead {
  font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif;
  color: var(--secondary);
  font-size: 18px;
  line-height: 28px;
  font-weight: 400;
  max-width: 840px;
  margin: 0 0 28px;
}
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; }
.tag { border: 1px solid var(--outline); background: var(--surface-low); padding: 6px 10px; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.hero-media { border: 1px solid var(--outline); background: var(--surface-high); aspect-ratio: 4 / 5; overflow: hidden; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); opacity: .92; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 64px; align-items: start; }
.article-body { max-width: 880px; min-width: 0; padding: 48px 0 96px; overflow-wrap: break-word; }
.article-body p { margin: 0 0 22px; color: #26292b; font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif; font-size: 18px; line-height: 1.55; }
.article-body strong { color: var(--primary); font-weight: 700; }
.article-body ul, .article-body ol { margin: 18px 0 28px; padding-left: 24px; }
.article-body li { margin: 10px 0; padding-left: 4px; }
.toc { position: sticky; top: 112px; min-width: 0; padding-top: 56px; font-size: 14px; color: var(--secondary); }
.toc-title { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--primary); margin-bottom: 14px; }
.toc a { display: block; padding: 10px 0; text-decoration: none; border-bottom: 1px solid var(--outline); }
.callout { border-left: 3px solid var(--primary); background: var(--surface-low); padding: 24px 28px; margin: 36px 0; color: var(--primary); }
.callout p:last-child { margin-bottom: 0; }

.article-summary {
  border: 1px solid var(--outline-variant, #e9ecef);
  background: var(--surface-low, #f8f9fa);
  padding: 24px 28px;
  margin: 28px 0 36px;
}
.article-summary-label {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--outline, #75777f);
  margin: 0 0 12px;
}
.article-summary p { margin: 0 0 10px; color: var(--secondary, #44464e); line-height: 1.6; }
.article-summary-note { font-size: 13px; color: var(--outline, #75777f); margin-bottom: 0 !important; }

.article-service-link { margin: 40px 0 0; }
.article-service-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--outline, #75777f);
  margin-bottom: 12px;
}
.article-service-card {
  display: inline-block;
  border: 1px solid var(--primary, #00081e);
  padding: 16px 24px;
  color: var(--primary, #00081e);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}
.article-service-card:hover { background: var(--surface-low, #f3f4f6); }

.article-tool {
  margin: 40px 0;
  padding: 24px 28px;
  border: 1px solid var(--outline, #c5c6cf);
  border-left: 4px solid var(--accent, #e9c176);
  background: #fff;
}
.article-tool-label {
  margin: 0 0 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--outline-strong, #75777f);
}
.article-tool-hook { margin: 0 0 14px; font-size: 1.1rem; font-weight: 600; color: var(--primary, #00081e); }
.article-tool-metrics { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; padding: 0; list-style: none; }
.article-tool-metrics li {
  padding: 4px 10px;
  border: 1px solid var(--outline-variant, #e9ecef);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink, #191c1d);
}
.article-tool [data-portal-compact] { margin: 0; padding: 0; list-style: none; }
.article-tool [data-portal-compact] a {
  display: block;
  padding: 14px 18px;
  background: var(--primary, #00081e);
  color: #fff;
  text-decoration: none;
  transition: background 0.2s;
}
.article-tool [data-portal-compact] a:hover { background: var(--primary-2, #0a1f44); }
.article-tool [data-portal-compact] a span { color: inherit; }
.article-tool [data-portal-compact] a > span:first-child { font-weight: 600; }
.article-tool [data-portal-compact] a > span:last-child { display: block; margin-top: 4px; font-size: 13px; opacity: 0.85; }
.article-tool-note { margin: 12px 0 0; font-size: 13px; line-height: 1.5; color: var(--muted, #44464e); }
.article-body .article-tool p.article-tool-label { margin: 0 0 8px; font-family: 'JetBrains Mono', monospace; font-size: 11px; line-height: 1.4; color: var(--outline-strong, #75777f); }
.article-body .article-tool p.article-tool-hook { margin: 0 0 14px; font-size: 1.1rem; font-weight: 600; color: var(--primary, #00081e); }
.article-body .article-tool p.article-tool-note { margin: 12px 0 0; font-size: 13px; line-height: 1.5; color: var(--muted, #44464e); }
.article-body .article-tool ul { margin: 0 0 18px; padding-left: 0; }
.article-body .article-tool li { margin: 0; padding-left: 0; }
.article-body .article-tool .article-tool-metrics li { padding: 4px 10px; }
.article-body .article-tool [data-portal-compact] { margin: 0; }

.article-faq { margin: 48px 0 0; padding-top: 32px; border-top: 1px solid var(--outline-variant, #e9ecef); }
.article-faq h2 { font-size: 1.35rem; margin-bottom: 20px; }
.article-faq-list { display: flex; flex-direction: column; gap: 12px; }
.article-faq-item {
  border: 1px solid var(--outline-variant, #e9ecef);
  background: #fff;
  padding: 16px 20px;
}
.article-faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--primary, #00081e);
  list-style: none;
}
.article-faq-item summary::-webkit-details-marker { display: none; }
.article-faq-item p { margin: 12px 0 0; font-size: 14px; line-height: 1.55; color: var(--secondary, #44464e); }
.verification-note { border: 1px solid var(--outline); background: #fff; padding: 14px 18px; margin: 0 0 28px; font-size: 14px; line-height: 1.5; color: var(--muted); }
.verification-note strong { color: var(--primary); }
.source-ref {
  font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
  border-left: 2px solid var(--outline-strong);
  padding: 2px 0 2px 14px;
  margin: 20px 0;
}
.source-ref a { color: var(--primary-2); font-weight: 600; font-family: 'JetBrains Mono', monospace; font-size: 13px; }
.illustrative { display: inline-block; border: 1px solid var(--outline); padding: 2px 6px; font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--outline-strong); vertical-align: middle; }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 34px 0; }
.metric { border: 1px solid var(--outline); background: var(--surface-card); padding: 22px; }
.metric .num { display: block; font-family: 'Libre Caslon Text', serif; color: var(--primary); font-size: 34px; line-height: 1; margin-bottom: 8px; }
.metric .label { font-family: 'JetBrains Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--outline-strong); }
.diagram-card { margin: 48px 0; border: 1px solid var(--outline); background: #fff; padding: 24px; overflow-x: auto; }
.diagram-card h3 { font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif; font-size: 18px; font-weight: 700; margin: 0 0 6px; }
.diagram-card p { color: var(--secondary); font-size: 15px; margin: 0 0 18px; }
.diagram-card svg { min-width: 760px; width: 100%; height: auto; display: block; shape-rendering: geometricPrecision; }
.diagram-card svg text { font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif; }
.diagram-note { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--outline); font-family: 'JetBrains Mono', monospace; font-size: 11px; line-height: 1.5; color: var(--outline-strong); }
.comparison { width: 100%; border-collapse: collapse; margin: 34px 0; font-size: 16px; }
.comparison th, .comparison td { border: 1px solid var(--outline); padding: 14px 16px; vertical-align: top; text-align: left; }
.comparison th { background: var(--primary); color: #fff; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.comparison tr:nth-child(even) td { background: var(--surface-low); }
.article-cta { margin: 64px 0 36px; padding: 40px; background: var(--primary); color: #fff; }
.article-cta h2 { color: #fff; margin: 0 0 16px; font-size: 38px; }
.article-cta p { color: rgba(255,255,255,.76); max-width: 760px; }
.article-cta a { background: #fff; color: var(--primary); margin-top: 10px; }
.sources { border-top: 1px solid var(--outline); padding-top: 32px; margin-top: 52px; font-size: 15px; color: var(--muted); }
.sources h2 { font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif; font-size: 18px; font-weight: 700; margin: 0 0 14px; }
.sources ol { padding-left: 20px; margin: 0; }
.sources li { margin: 8px 0; }
.related-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 28px 0 0; }
.related-card { border: 1px solid var(--outline); background: #fff; padding: 22px; text-decoration: none; }
.related-card span { display: block; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--outline-strong); margin-bottom: 10px; }
.related-card strong { font-family: 'Libre Caslon Text', serif; font-size: 24px; line-height: 1.15; color: var(--primary); font-weight: 400; }
.article-footer { border-top: 1px solid var(--outline); background: var(--surface-high); padding: 56px 64px; display: grid; grid-template-columns: 1fr auto; gap: 40px; }
.article-footer p { margin: 12px 0 0; color: var(--muted); max-width: 480px; }
.footer-label { font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--primary) !important; margin-top: 0 !important; }
.index-hero { padding: 88px 0 56px; border-bottom: 1px solid var(--outline); }
.index-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; padding: 56px 0 96px; }
.index-card { min-height: 320px; border: 1px solid var(--outline); background: #fff; text-decoration: none; display: flex; flex-direction: column; }
.index-card img { width: 100%; height: 160px !important; max-height: 160px; object-fit: cover; filter: grayscale(1); border-bottom: 1px solid var(--outline); display: block; }
.index-card-body { padding: 28px; display: flex; flex-direction: column; flex: 1; }
.index-card h2 { margin: 12px 0 16px; font-size: 1.875rem; line-height: 1.25; }
.index-card p { margin: 0; color: var(--secondary); font-family: 'Hanken Grotesk', 'Manrope', system-ui, sans-serif; }
.index-card .read { margin-top: auto; padding-top: 24px; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--primary); }
@media (max-width: 980px) {
  .article-shell { padding: 0 24px; }
  .article-hero, .article-layout { grid-template-columns: 1fr; }
  .hero-media { aspect-ratio: 16 / 9; }
  .toc { display: none; }
  .metric-grid, .related-grid, .index-grid { grid-template-columns: 1fr; }
  .article-footer { padding: 40px 24px; grid-template-columns: 1fr; }
}
@media print {
  @page { size: A4; margin: 16mm; }
  body { background: #fff; font-size: 12pt; line-height: 1.45; }
  header, .toc, .article-footer { display: none; }
  .article-shell { padding: 0; max-width: none; }
  .article-hero { display: block; padding: 0 0 16pt; }
  .hero-media { display: none; }
  h1 { font-size: 30pt; }
  h2 { font-size: 21pt; page-break-after: avoid; }
  h3 { page-break-after: avoid; }
  .article-body { max-width: none; padding: 0; }
  .diagram-card, .callout, .article-cta { page-break-inside: avoid; }
}