:root{
  --bg:#eef2f6;--paper:#fff;--paper2:#f7f9fc;--ink:#162130;--muted:#697789;
  --line:#dbe3ee;--navy:#10243c;--navy2:#193754;--blue:#2f6ea5;
  --sky:#7db3dd;--sun:#d8b64b;--green:#2f7d5b;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);
  background:linear-gradient(180deg,#f7f9fb,#edf1f5 42%,#eef2f6);
  font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
.wrap{width:min(1000px,calc(100% - 30px));margin:auto}
.top{
  position:sticky;top:0;z-index:20;background:rgba(247,249,251,.9);
  backdrop-filter:blur(16px);border-bottom:1px solid rgba(16,36,60,.08)
}
.topin{min-height:62px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:950}
.brandmark{width:32px;height:32px;border-radius:8px;overflow:hidden;display:grid;grid-template-rows:1fr 1fr 1fr;border:1px solid #d8e0e9;background:#fff}
.brandmark span:nth-child(1),.brandmark span:nth-child(3){background:var(--sky)}
.brandmark span:nth-child(2){display:flex;align-items:center;justify-content:center}
.brandmark i{width:9px;height:9px;border-radius:50%;background:var(--sun)}
.brand-name{font-size:14px;letter-spacing:.06em}
.back{font-size:12px;font-weight:800;color:#5d6d7e;text-decoration:none}
.back:hover{text-decoration:underline}

.hero{padding:38px 0 18px}
.breadcrumbs{font-size:11px;color:#728093;margin-bottom:12px}
.breadcrumbs a{text-decoration:none}.breadcrumbs a:hover{text-decoration:underline}
.hero-card{
  color:#fff;border-radius:28px;padding:38px 40px;
  background:radial-gradient(circle at 90% 12%,rgba(125,179,221,.22),transparent 28%),linear-gradient(135deg,var(--navy),var(--navy2));
  box-shadow:0 22px 54px rgba(16,36,60,.12)
}
.kicker{font-size:11px;font-weight:900;letter-spacing:.09em;text-transform:uppercase;color:#abd1ea}
h1{margin:12px 0 12px;font-size:clamp(38px,6vw,64px);line-height:1;letter-spacing:-.055em;max-width:850px}
.hero-lead{margin:0;max-width:760px;color:#d6e1eb;font-size:17px;line-height:1.55}

.answer{
  margin-top:18px;background:var(--paper);border:1px solid var(--line);border-radius:22px;
  padding:24px;box-shadow:0 10px 30px rgba(16,36,60,.045)
}
.answer-label{font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:#6d7d90}
.answer-value{margin-top:6px;font-size:clamp(38px,7vw,64px);font-weight:950;letter-spacing:-.055em;color:#11263f;font-variant-numeric:tabular-nums}
.answer-unit{font-size:14px;font-weight:800;color:#657487;margin-top:6px}
.answer-text{margin:14px 0 0;color:#465568;line-height:1.65;font-size:15px}

.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:12px 0 0}
.metric{background:var(--paper);border:1px solid var(--line);border-radius:17px;padding:17px}
.metric-label{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:#7a8797;font-weight:850}
.metric-value{margin-top:6px;font-size:24px;font-weight:950;letter-spacing:-.035em;font-variant-numeric:tabular-nums}
.metric-note{margin-top:4px;font-size:10.5px;color:#7c8896;line-height:1.35}

.livebox{
  margin:14px 0;background:#10243c;color:#fff;border-radius:20px;padding:22px;
  display:flex;align-items:end;justify-content:space-between;gap:20px;flex-wrap:wrap
}
.livebox-label{font-size:11px;color:#acd0e9;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.live-counter{font-size:clamp(36px,7vw,58px);font-weight:950;letter-spacing:-.05em;font-variant-numeric:tabular-nums}
.live-note{max-width:330px;color:#c4d1dc;font-size:11px;line-height:1.5}

.article{
  margin:24px 0;background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:28px;
  box-shadow:0 10px 30px rgba(16,36,60,.035)
}
.article h2{font-size:26px;letter-spacing:-.035em;margin:0 0 12px}
.article h3{font-size:18px;letter-spacing:-.02em;margin:26px 0 8px}
.article p{font-size:15px;line-height:1.72;color:#405064;margin:0 0 14px}
.article strong{color:#223448}
.method{
  border-left:3px solid var(--sky);background:#f5f8fb;border-radius:0 13px 13px 0;
  padding:15px 17px;margin:18px 0;color:#45566a;font-size:13px;line-height:1.6
}
.source{
  background:#f8fafc;border:1px solid var(--line);border-radius:15px;padding:15px 16px;
  font-size:12px;line-height:1.55;color:#59697c
}
.source strong{color:#293a4d}

.faq{display:grid;gap:9px;margin-top:10px}
.faq-item{border:1px solid var(--line);border-radius:15px;padding:16px;background:#fff}
.faq-q{font-size:14px;font-weight:900;color:#25364a}
.faq-a{margin-top:7px;font-size:13px;line-height:1.55;color:#57677a}

.related{padding:5px 0 12px}
.related h2{font-size:22px;letter-spacing:-.03em}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.related-card{
  display:block;text-decoration:none;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:16px;transition:.15s transform,.15s box-shadow
}
.related-card:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(16,36,60,.06)}
.related-card small{display:block;color:#7c8998;font-size:10px;text-transform:uppercase;letter-spacing:.06em}
.related-card b{display:block;margin-top:6px;font-size:14px;line-height:1.3}

.footer{margin-top:30px;padding:24px 0 42px;border-top:1px solid var(--line);font-size:10.5px;color:#7a8796;line-height:1.6}
.footer strong{color:#526173}

@media(max-width:700px){
  .wrap{width:calc(100% - 20px)}
  .topin{min-height:56px}.brand-name{font-size:12px}.back{font-size:11px}
  .hero{padding:20px 0 10px}.hero-card{padding:26px 18px;border-radius:21px}
  h1{font-size:clamp(34px,10vw,46px)}.hero-lead{font-size:14px}
  .answer{padding:19px;border-radius:18px}.answer-value{font-size:clamp(36px,11vw,52px)}
  .metrics{grid-template-columns:1fr}
  .metric{padding:14px}
  .article{padding:20px 17px;border-radius:18px}.article h2{font-size:23px}
  .livebox{padding:19px 17px}.live-counter{font-size:clamp(34px,11vw,48px)}
  .related-grid{grid-template-columns:1fr}
}


/* V26 organized topic navigation */
.topic-nav{display:flex;gap:7px;flex-wrap:wrap;margin:15px 0 0}
.topic-nav a{font-size:11px;font-weight:800;text-decoration:none;color:#536579;background:#f6f8fb;border:1px solid var(--line);padding:8px 10px;border-radius:999px}
.topic-nav a:hover{color:#173452;border-color:#b9c9d8}
.hub-hero{padding:34px 0 18px}
.hub-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:14px 0 28px}
.hub-card{display:flex;align-items:center;justify-content:space-between;gap:18px;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px 19px}
.hub-card:hover{border-color:#bdcad7;box-shadow:0 10px 24px rgba(16,36,60,.04)}
.hub-card-copy{min-width:0}
.hub-card small{display:block;font-size:10px;color:#7c8898;text-transform:uppercase;letter-spacing:.06em}
.hub-card b{display:block;margin-top:5px;font-size:15px;line-height:1.25;color:#24364a}
.hub-card p{margin:4px 0 0;font-size:11px;line-height:1.35;color:#778495}
.hub-arrow{font-size:19px;color:#8fa0b1}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.category-card{display:block;text-decoration:none;border:1px solid var(--line);background:#fff;border-radius:19px;padding:19px}
.category-card:hover{border-color:#bdcad7}
.category-icon{font-size:24px}
.category-card h2{margin:10px 0 5px;font-size:18px;letter-spacing:-.02em}
.category-card p{margin:0;color:#748193;font-size:11.5px;line-height:1.45}
.category-card span{display:inline-block;margin-top:12px;font-size:11px;color:#2f6ea5;font-weight:850}
.popular-strip{display:flex;gap:8px;flex-wrap:wrap;margin-top:13px}
.popular-strip a{text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 12px;font-size:11px;font-weight:800;color:#44576b}
@media(max-width:700px){
  .hub-grid,.category-grid{grid-template-columns:1fr}
  .hub-card{padding:15px}
}