:root {
  --ink: #111111;
  --muted: #5f625f;
  --line: #d9dad8;
  --soft: #f5f6f4;
  --accent: #315b4c;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #ffffff;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-underline-offset: 4px; }
a:hover { color: var(--accent); }
.wrap { width: min(var(--max), calc(100% - 64px)); margin-inline: auto; }

.site-header {
  min-height: 68px;
  padding: 0 max(32px, calc((100% - var(--max)) / 2));
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: rgba(255,255,255,.96);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-name { font-weight: 700; text-decoration: none; }
nav { display: flex; gap: 24px; font-size: .88rem; }
nav a { text-decoration: none; }

.hero { padding: 78px 0 62px; max-width: 900px; margin-left: max(32px, calc((100% - var(--max)) / 2)); }
.eyebrow, .section-label {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
}
h1, h2, h3 { margin-top: 0; line-height: 1.12; letter-spacing: -.025em; }
h1 { max-width: 850px; margin-bottom: 24px; font-family: Georgia, 'Times New Roman', serif; font-size: clamp(2.65rem, 4.8vw, 4.55rem); font-weight: 400; }
h2 { font-family: Georgia, 'Times New Roman', serif; font-size: clamp(1.75rem, 2.9vw, 2.7rem); font-weight: 400; }
h3 { font-size: 1rem; letter-spacing: -.01em; }
.standfirst { max-width: 800px; margin: 0 0 20px; font-size: clamp(1.18rem, 1.8vw, 1.55rem); line-height: 1.45; }
.summary { max-width: 760px; color: var(--muted); }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; margin-top: 26px; }
.actions a { font-size: .9rem; font-weight: 700; }
.actions .primary { display: inline-block; padding: 11px 17px; background: var(--ink); color: white; text-decoration: none; }
.actions .primary:hover { background: var(--accent); color: white; }

.fact-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-inline: max(32px, calc((100% - var(--max)) / 2));
}
.fact-strip div { min-height: 128px; padding: 25px 24px 24px 0; border-right: 1px solid var(--line); }
.fact-strip div:not(:first-child) { padding-left: 28px; }
.fact-strip div:last-child { border-right: 0; }
.fact-strip strong { display: block; margin-bottom: 6px; font-family: Georgia, 'Times New Roman', serif; font-size: 1.7rem; font-weight: 400; }
.fact-strip span { display: block; color: var(--muted); font-size: .84rem; line-height: 1.45; }

.section { padding-block: 68px; }
.section-break { border-top: 1px solid var(--line); }
.two-column { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 80px; }
.prose p:first-child, .intro { margin-top: 0; }
.prose p, .intro { max-width: 720px; }
.prose p:last-child { margin-bottom: 0; }
.intro { color: var(--muted); font-size: 1.08rem; }

.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; margin-top: 36px; }
.method-grid article { border-top: 2px solid var(--ink); padding-top: 18px; }
.method-grid article > span, .finding-number { color: var(--accent); font-size: .76rem; font-weight: 700; letter-spacing: .1em; }
.method-grid h3 { margin: 18px 0 10px; }
.method-grid p { margin: 0; color: var(--muted); font-size: .9rem; }
code { padding: 2px 5px; background: var(--soft); font-family: 'Courier New', monospace; font-size: .85em; }

.definition-table { margin-top: 48px; border-top: 1px solid var(--line); }
.definition-table div { display: grid; grid-template-columns: 1fr 2fr; gap: 30px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.definition-table span { color: var(--muted); }

.table-wrap { overflow-x: auto; margin-top: 34px; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
caption { margin-bottom: 14px; text-align: left; font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
th, td { padding: 15px 14px; border-bottom: 1px solid var(--line); text-align: right; vertical-align: top; }
th { border-top: 2px solid var(--ink); font-size: .8rem; }
th:first-child, td:first-child { padding-left: 0; text-align: left; }
small { color: var(--muted); }

.findings-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 52px; }
.findings-grid article { border-top: 1px solid var(--line); padding-top: 20px; }
.findings-grid h3 { margin: 14px 0 10px; }
.findings-grid p:last-child { color: var(--muted); }
.result-note { margin-top: 48px; padding: 24px 0 0; border-top: 2px solid var(--ink); }
.result-note dl { margin: 0; }
.result-note dl div { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.result-note dd { margin: 0; font-variant-numeric: tabular-nums; }

.audience-list { border-top: 1px solid var(--line); }
.audience-list article { display: grid; grid-template-columns: .8fr 2fr; gap: 40px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.audience-list p { margin: 0; color: var(--muted); }

.download-section { padding-block: 64px 76px; border-top: 1px solid var(--line); }
.download-section > div:first-child { max-width: 720px; }
.download-section h2 { margin-bottom: 16px; }
.download-section p:last-child { color: var(--muted); }

footer { padding: 48px 0 60px; background: var(--ink); color: white; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
footer strong { font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; }
footer p { margin: 8px 0 0; color: #c9cbc8; font-size: .85rem; }

@media (max-width: 860px) {
  .site-header { padding-inline: 22px; }
  nav { display: none; }
  .wrap { width: min(100% - 40px, var(--max)); }
  .hero { margin-inline: 20px; padding: 58px 0 48px; }
  .fact-strip { grid-template-columns: 1fr 1fr; padding-inline: 20px; }
  .fact-strip div { border-bottom: 1px solid var(--line); }
  .fact-strip div:nth-child(2) { border-right: 0; }
  .fact-strip div:nth-child(3), .fact-strip div:nth-child(4) { border-bottom: 0; }
  .two-column { grid-template-columns: 1fr; gap: 28px; }
  .method-grid { grid-template-columns: 1fr 1fr; }
  .findings-grid { grid-template-columns: 1fr; gap: 24px; }
  .download-section { display: block; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  h1 { font-size: 2.65rem; }
  .section { padding-block: 54px; }
  .fact-strip { grid-template-columns: 1fr; }
  .fact-strip div, .fact-strip div:not(:first-child) { min-height: 0; padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .fact-strip div:nth-child(3) { border-bottom: 1px solid var(--line); }
  .method-grid { grid-template-columns: 1fr; }
  .definition-table div, .result-note dl div, .audience-list article { grid-template-columns: 1fr; gap: 6px; }
  th, td { min-width: 130px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}