:root {
  --bg: #000000;
  --fg: #ffffff;
  --muted: #8a8a8a;
  --dim: #4a4a4a;
  --hair: #1c1c1c;
  --accent: #ffffff;
  --maxw: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
html, body { overflow-x: hidden; max-width: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.6;
  font-weight: 300;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--hair);
}
.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img { width: 26px; height: auto; display: block; }
.brand .wordmark {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  padding-left: 4px;
}
.nav-links {
  display: flex;
  gap: 34px;
  list-style: none;
}
.nav-links a {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.active { color: var(--fg); border-bottom-color: var(--fg); }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 120px 28px 90px;
  text-align: center;
}
.hero .mark { width: 400px; max-width: 82vw; height: auto; margin: 0 auto 40px; display: block; opacity: 0.97; }
.hero h1 {
  font-size: clamp(44px, 9vw, 96px);
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-left: 0.3em;
}
.hero--top {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 44px 28px 30px;
  text-align: center;
}
.hero--top .mark { width: 168px; margin: 0; flex: none; }
.hero--top .hero-title {
  font-size: clamp(16px, 5vw, 56px);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
}
.hero .lede {
  max-width: 620px;
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
  font-weight: 300;
}

/* ---------- Section framing ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 70px 28px;
  width: 100%;
}
.section--first { padding-top: 96px; }
.section--first .lede {
  max-width: 640px;
  margin: 0 auto 64px;
  text-align: center;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
  font-weight: 300;
}
.section-label {
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
  margin-bottom: 12px;
}
.section-title {
  text-align: center;
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.section-intro {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
  color: var(--muted);
  font-size: 16px;
}

/* ---------- Stat pairs (the centerpiece) ---------- */
.stat-pair {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 54px 0;
  border-top: 1px solid var(--hair);
}
.stat-pair:last-child { border-bottom: 1px solid var(--hair); }

/* Country blocks (front page) */
.country { border-top: 1px solid var(--hair); }
.country:last-of-type { border-bottom: 1px solid var(--hair); }
.country-name {
  text-align: center;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--fg);
  margin: 44px 0 -14px;
}
.country .stat-pair { border: none; }
.tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 3px 9px;
  border: 1px solid var(--hair);
  color: var(--dim);
  margin-top: 16px;
}
.tag--recent { color: var(--muted); border-color: var(--muted); }
.stat .source { margin-top: 12px; }

.stat {
  text-align: center;
  min-width: 0;
}
.stat .kicker {
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}
.stat .figure {
  font-size: clamp(42px, 6.6vw, 76px);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}
.stat.official .figure { color: var(--fg); }
.stat.reality .figure { color: var(--fg); }
.stat .unit {
  display: block;
  font-size: clamp(15px, 2vw, 19px);
  font-weight: 400;
  color: var(--fg);
  margin-top: 14px;
  letter-spacing: 0.02em;
}
.stat .caption {
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.5;
}
.stat .source {
  display: block;
  font-size: 11px;
  color: var(--dim);
  margin-top: 14px;
  letter-spacing: 0.04em;
}
.stat .source a { border-bottom: 1px solid var(--dim); }
.stat .source a:hover { color: var(--muted); border-color: var(--muted); }

.vs {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  white-space: nowrap;
  align-self: center;
  padding: 0 6px;
}
.vs::before, .vs::after {
  content: "";
  display: block;
  width: 1px;
  height: 26px;
  background: var(--hair);
  margin: 10px auto;
}

.stat-note {
  max-width: 720px;
  margin: 56px auto 0;
  text-align: center;
  color: var(--dim);
  font-size: 13px;
  line-height: 1.8;
}
.stat-note em { color: var(--muted); font-style: italic; }

/* ---------- Generic content (testimonials / papers) ---------- */
.page-head {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 90px 28px 20px;
  text-align: center;
}
.page-head h1 {
  font-size: clamp(30px, 6vw, 52px);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.page-head p {
  max-width: 600px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: 16px;
}

/* Testimonial cards */
.card-grid {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 28px 40px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.testimonial {
  border: 1px solid var(--hair);
  padding: 38px 40px;
  position: relative;
}
.testimonial .quote {
  font-size: 20px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--fg);
}
.testimonial .quote::before {
  content: "\201C";
  display: block;
  font-size: 56px;
  line-height: 0;
  color: var(--dim);
  margin-bottom: 26px;
}
.testimonial .attribution {
  margin-top: 26px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}
.placeholder-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--hair);
  padding: 4px 10px;
  margin-bottom: 22px;
}

/* Papers list */
.papers {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 28px 40px;
}
.paper {
  border-top: 1px solid var(--hair);
  padding: 34px 0;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 28px;
}
.paper:last-child { border-bottom: 1px solid var(--hair); }
.paper .year {
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.paper h3 {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.4;
  margin-bottom: 8px;
}
.paper .authors { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.paper .abstract { font-size: 15px; color: var(--muted); line-height: 1.7; }
.paper .paper-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg);
  border-bottom: 1px solid var(--dim);
  padding-bottom: 2px;
}
.paper .paper-link:hover { border-color: var(--fg); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--hair);
  padding: 40px 28px;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-inner .brand .wordmark { font-size: 20px; }
.brand--footer { align-items: center; gap: 14px; }
.brand--footer img { width: 46px; height: auto; }
.site-footer .note { font-size: 14px; color: var(--muted); max-width: 480px; line-height: 1.7; }
.footer-subnote {
  max-width: var(--maxw);
  margin: 22px auto 0;
  font-size: 12px;
  color: var(--dim);
  line-height: 1.6;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .nav { padding: 16px 20px; }
  .nav-links { gap: 20px; }
  .nav-links a { font-size: 11px; letter-spacing: 0.12em; }
  .brand .wordmark { font-size: 16px; letter-spacing: 0.2em; }
  .stat-pair { grid-template-columns: 1fr; gap: 6px; padding: 40px 0; }
  .vs { display: flex; align-items: center; justify-content: center; gap: 12px; margin: 6px 0; }
  .vs::before, .vs::after { width: 40px; height: 1px; margin: 0; }
  .paper { grid-template-columns: 1fr; gap: 8px; }
  .hero { padding: 80px 20px 60px; }
  .hero--top { gap: 16px; padding: 30px 16px 24px; }
  .hero--top .mark { width: 78px; }
  .hero--top .hero-title { font-size: clamp(14px, 5vw, 22px); letter-spacing: 0.1em; }
}