:root {
  --ink: #172a3a;
  --muted: #61717a;
  --paper: #f5f1e8;
  --cream: #fffaf0;
  --coral: #d66b4d;
  --blue: #2f6f95;
  --yellow: #e9bd55;
  --line: #d8d2c7;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: 'Trebuchet MS', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.5; }
a { color: inherit; }
.site-header { align-items: center; display: flex; justify-content: space-between; margin: 0 auto; max-width: 1240px; padding: 28px 36px; }
.wordmark { font-family: var(--serif); font-size: 1.25rem; text-decoration: none; }
.wordmark span { color: var(--coral); font-style: italic; }
.site-header nav { display: flex; gap: 28px; }
.site-header nav a { color: var(--muted); font-size: .78rem; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.site-header nav a:hover, .text-link:hover, .site-footer a:hover { color: var(--coral); }
.hero { align-items: end; background: var(--cream); border-top: 1px solid var(--line); display: grid; gap: 40px; grid-template-columns: 1.4fr .6fr; margin: 0 auto; max-width: 1240px; min-height: 520px; padding: 86px 80px 74px; position: relative; }
.hero:after { background: var(--yellow); content: ''; height: 14px; position: absolute; right: 80px; top: 0; width: 130px; }
.kicker { color: var(--coral); font-size: .7rem; font-weight: 700; letter-spacing: .15em; margin: 0 0 20px; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; line-height: .98; }
h1 { font-size: clamp(3.6rem, 8vw, 7.5rem); letter-spacing: -.03em; margin-bottom: 26px; max-width: 720px; }
.lede { color: var(--muted); font-size: 1.12rem; max-width: 530px; }
.text-link { color: var(--blue); display: inline-block; font-weight: 700; margin-top: 20px; text-underline-offset: 5px; }
.hero-stat { border-left: 1px solid var(--line); display: flex; flex-direction: column; padding: 20px 0 16px 42px; }
.stat-label, .stat-unit, .stat-note { color: var(--muted); }
.stat-label { font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; }
.hero-stat strong { color: var(--coral); font-family: var(--serif); font-size: clamp(3rem, 6vw, 5.5rem); font-weight: 400; line-height: 1; margin: 18px 0 4px; }
.stat-unit { font-family: var(--serif); font-size: 1.2rem; }
.stat-note { font-size: .75rem; margin-top: auto; }
.signal-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0 auto; max-width: 1240px; }
.signal-strip div { align-items: center; background: var(--ink); border-right: 1px solid #496070; color: var(--cream); display: flex; gap: 16px; min-height: 112px; padding: 20px 28px; }
.signal-strip div:nth-child(2) { background: var(--coral); border-color: #e18a70; }
.signal-strip div:nth-child(3) { background: var(--blue); border-color: #5d8fac; }
.signal-strip div:last-child { border: 0; }
.signal-strip span { font-family: var(--serif); font-size: 1.65rem; white-space: nowrap; }
.signal-strip small { color: #dbe3e4; font-size: .68rem; line-height: 1.3; text-transform: uppercase; }
.section { margin: 0 auto; max-width: 1240px; padding: 110px 36px; }
.section-heading { max-width: 680px; }
h2 { font-size: clamp(2.6rem, 5vw, 4.8rem); margin-bottom: 18px; }
.section-heading > p:last-child { color: var(--muted); max-width: 470px; }
.chart-grid { display: grid; gap: 24px; grid-template-columns: repeat(2, 1fr); margin-top: 60px; }
.chart-card { background: var(--cream); border-top: 5px solid var(--blue); padding: 24px; }
.chart-card-wide { grid-column: span 2; }
.chart-card:nth-child(2n) { border-color: var(--coral); }
.chart-meta { color: var(--muted); display: flex; font-size: .68rem; justify-content: space-between; letter-spacing: .1em; text-transform: uppercase; }
.chart-card h3 { font-family: var(--serif); font-size: 1.8rem; font-weight: 400; margin: 14px 0 22px; }
.chart-card img { background: white; display: block; height: auto; max-width: 100%; width: 100%; }
.chart-card p { color: var(--muted); font-size: .9rem; margin: 18px 0 0; }
.methods-band { background: var(--ink); color: var(--cream); margin: 0 auto; max-width: 1240px; padding: 100px 80px 70px; }
.methods-band .kicker { color: var(--yellow); }
.method-columns { border-top: 1px solid #496070; display: grid; gap: 34px; grid-template-columns: repeat(3, 1fr); margin-top: 60px; padding-top: 30px; }
.method-columns h3 { color: var(--yellow); font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; }
.method-columns p { color: #cbd6d8; font-size: .92rem; max-width: 270px; }
.controls { align-items: center; border-top: 1px solid #496070; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 58px; padding-top: 24px; }
.controls > span:first-child { color: #cbd6d8; font-size: .75rem; margin-right: 8px; text-transform: uppercase; }
.unit-toggle { background: transparent; border: 1px solid #899da3; color: var(--cream); cursor: pointer; font: inherit; font-size: .8rem; min-width: 44px; padding: 7px 10px; }
.unit-toggle[aria-pressed='true'] { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
.control-result { color: var(--yellow); font-family: var(--serif); font-size: 1.1rem; margin-left: 14px; }
.site-footer { display: flex; font-size: .72rem; gap: 26px; justify-content: space-between; margin: 0 auto; max-width: 1240px; padding: 28px 36px 42px; }
.site-footer span:nth-child(2) { color: var(--muted); }
.site-footer a { color: var(--blue); font-weight: 700; }
@media (max-width: 760px) {
  .site-header { align-items: start; padding: 22px 20px; }
  .site-header nav { gap: 12px; }
  .site-header nav a { font-size: .62rem; }
  .hero { display: block; min-height: auto; padding: 74px 24px 58px; }
  .hero:after { right: 24px; width: 80px; }
  h1 { font-size: 4.2rem; }
  .hero-stat { border-left: 0; border-top: 1px solid var(--line); margin-top: 60px; padding: 24px 0 0; }
  .signal-strip { grid-template-columns: repeat(2, 1fr); }
  .signal-strip div { border-bottom: 1px solid #496070; min-height: 92px; padding: 16px; }
  .signal-strip div:nth-child(2) { border-color: #e18a70; }
  .signal-strip span { font-size: 1.25rem; }
  .section { padding: 76px 20px; }
  .chart-grid { display: block; margin-top: 38px; }
  .chart-card, .chart-card-wide { margin-bottom: 20px; }
  .methods-band { padding: 76px 24px 48px; }
  .method-columns { display: block; margin-top: 42px; }
  .method-columns > div { border-bottom: 1px solid #496070; padding: 0 0 20px; }
  .method-columns > div + div { padding-top: 20px; }
  .control-result { flex-basis: 100%; margin: 10px 0 0; }
  .site-footer { display: block; padding: 24px 20px 34px; }
  .site-footer span, .site-footer a { display: block; margin-bottom: 10px; }
}