:root {
  --ink: #191d21;
  --muted: #5b646b;
  --paper: #f7f8f6;
  --white: #ffffff;
  --coral: #dc5f4d;
  --teal: #116f74;
  --line: #d8dcda;
  --charcoal: #20272b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}
a { color: inherit; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 0 34px;
  color: var(--white);
  background: rgba(25, 29, 33, .9);
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  backdrop-filter: blur(8px);
}
.wordmark { font-size: 1rem; font-weight: 800; text-decoration: none; }
nav { display: flex; gap: 26px; }
nav a { color: #e9ecea; font-size: .84rem; font-weight: 650; text-decoration: none; }
nav a:hover { color: var(--white); }

.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--charcoal);
}
.hero-media {
  width: 100%;
  aspect-ratio: 2041 / 710;
  background: var(--white);
}
.hero-media img {
  width: 100%;
  height: auto;
}
.hero-content {
  position: relative;
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
  padding: 58px 0 72px;
}
.venue, .eyebrow {
  margin: 0 0 16px;
  color: var(--coral);
  font-size: .76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .13em;
}
.hero .venue { color: #ffad9f; }
h1 {
  max-width: 980px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.8rem, 7vw, 6.3rem);
  font-weight: 500;
  line-height: .98;
  letter-spacing: 0;
  text-wrap: balance;
}
.subtitle { margin: 18px 0 0; color: #dfe5e3; font-size: clamp(1.05rem, 2vw, 1.42rem); }
.authors { max-width: 940px; margin: 28px 0 0; color: #cbd1cf; font-size: .88rem; line-height: 1.65; }
.authors strong { color: var(--white); }
.hero-links { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }
.hero-links a {
  min-height: 42px;
  padding: 11px 18px;
  border: 1px solid rgba(255,255,255,.55);
  color: var(--white);
  font-size: .84rem;
  font-weight: 750;
  text-decoration: none;
}
.hero-links .primary-link { background: var(--coral); border-color: var(--coral); }
.hero-links a:hover { background: var(--white); border-color: var(--white); color: var(--ink); }
.next-section {
  position: absolute;
  z-index: 3;
  right: 34px;
  bottom: 28px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255,255,255,.55);
  color: var(--white);
  font-size: 1.15rem;
  text-decoration: none;
}

.section-pad { padding: 92px 28px; }
.section-inner { width: min(1160px, 100%); margin: 0 auto; }
h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.15rem, 4.4vw, 4.35rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: 0;
  text-wrap: balance;
}
h3 { margin: 0; font-size: 1.02rem; letter-spacing: 0; }
p { line-height: 1.65; }

.idea { background: var(--white); }
.idea-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); gap: 80px; align-items: end; }
.lead-copy { border-left: 3px solid var(--teal); padding-left: 28px; color: var(--muted); font-size: 1.04rem; }
.lead-copy p:first-child { margin-top: 0; }
.lead-copy p:last-child { margin-bottom: 0; }

.method { background: var(--paper); }
.method h2 { max-width: 850px; }
.framework-figure { margin: 54px 0 0; }
.framework-media {
  width: 100%;
  aspect-ratio: 2035 / 930;
  background: var(--white);
  outline: 1px solid var(--line);
}
.framework-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
figcaption { margin-top: 14px; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.method-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 54px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}
.method-steps li { min-height: 235px; padding: 24px 24px 0 0; border-right: 1px solid var(--line); }
.method-steps li + li { padding-left: 24px; }
.method-steps li:last-child { border-right: 0; }
.step-number { display: block; margin-bottom: 32px; color: var(--coral); font-size: .74rem; font-weight: 800; }
.method-steps p { margin-bottom: 0; color: var(--muted); font-size: .9rem; }

.data-band { background: var(--teal); color: var(--white); }
.data-band .eyebrow { color: #a8dcd6; }
.data-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 85px; align-items: center; }
.data-copy p:last-child { max-width: 560px; color: #d9e9e7; }
.data-stats { display: grid; grid-template-columns: 1fr 1fr; margin: 0; border-top: 1px solid rgba(255,255,255,.35); border-left: 1px solid rgba(255,255,255,.35); }
.data-stats div { min-height: 142px; padding: 26px; border-right: 1px solid rgba(255,255,255,.35); border-bottom: 1px solid rgba(255,255,255,.35); }
.data-stats dt { font-family: Georgia, "Times New Roman", serif; font-size: clamp(2rem, 4vw, 3.5rem); }
.data-stats dd { margin: 8px 0 0; color: #c4dedb; font-size: .82rem; }
.data-evidence { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 56px; }
.data-evidence figure { margin: 0; }
.data-evidence img { width: 100%; height: auto; border: 1px solid rgba(255,255,255,.3); }
.data-evidence figcaption { color: #d9e9e7; }

.demos { background: var(--paper); }
.demo-heading { display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; align-items: end; }
.demo-heading > p { margin: 0; color: var(--muted); }
.demo-heading a, .asset-note a { color: var(--teal); }
.demo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 52px; }
.demo-grid figure { margin: 0; overflow: hidden; background: var(--white); border: 1px solid var(--line); }
.demo-grid img { width: 100%; height: auto; background: var(--charcoal); }
.demo-grid figcaption { display: flex; justify-content: space-between; gap: 14px; margin: 0; padding: 14px 16px; color: var(--ink); font-weight: 650; }
.demo-grid figcaption span { color: var(--coral); font-size: .68rem; font-weight: 800; text-transform: uppercase; }
.asset-note { max-width: 840px; margin: 30px 0 0; color: var(--muted); font-size: .78rem; }

.results { background: var(--white); }
.results-heading { display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; align-items: end; }
.results-heading > p { margin: 0; color: var(--muted); }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 58px; border: 1px solid var(--line); }
.metric-grid article { min-height: 150px; padding: 28px; border-right: 1px solid var(--line); }
.metric-grid article:last-child { border-right: 0; }
.metric-grid strong { display: block; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2rem, 3.5vw, 3.2rem); font-weight: 500; white-space: nowrap; }
.metric-grid span { display: block; margin-top: 19px; color: var(--muted); font-size: .77rem; font-weight: 750; }
.result-table-wrap { margin-top: 42px; overflow-x: auto; }
table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: .9rem; }
th, td { padding: 18px; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; }
tbody tr:hover { background: #f2f5f3; }
.efficiency-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 54px; background: var(--line); }
.efficiency-row div { min-height: 142px; padding: 25px; background: var(--charcoal); color: var(--white); }
.efficiency-row span, .efficiency-row small { display: block; color: #acb7b7; font-size: .72rem; }
.efficiency-row strong { display: block; margin: 13px 0 10px; font-family: Georgia, "Times New Roman", serif; font-size: 2rem; font-weight: 500; }

.resources { background: #e9eeeb; }
.resources-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; }
.resource-list { border-top: 1px solid #abb5b1; }
.resource-list a { display: grid; grid-template-columns: 110px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid #abb5b1; text-decoration: none; }
.resource-list span { color: var(--teal); font-size: .76rem; font-weight: 800; text-transform: uppercase; }
.resource-list strong { font-size: .93rem; }
.resource-list a:hover strong { color: var(--coral); }
.release-note { grid-column: 2; max-width: 680px; margin: -40px 0 0; color: var(--muted); font-size: .82rem; }

footer { display: flex; justify-content: space-between; gap: 20px; padding: 30px 34px; background: var(--charcoal); color: #bfc6c4; font-size: .76rem; }
footer p { margin: 0; line-height: 1.4; }
footer a { color: var(--white); }

@media (max-width: 900px) {
  .hero-content { width: min(100% - 48px, 760px); padding: 54px 0 72px; }
  .idea-grid, .data-layout, .demo-heading, .results-heading, .resources-layout { grid-template-columns: 1fr; gap: 40px; }
  .demo-grid { grid-template-columns: 1fr 1fr; }
  .method-steps, .metric-grid, .efficiency-row { grid-template-columns: 1fr 1fr; }
  .method-steps li:nth-child(2) { border-right: 0; }
  .method-steps li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .metric-grid article:nth-child(2) { border-right: 0; }
  .metric-grid article:nth-child(n+3) { border-top: 1px solid var(--line); }
  .release-note { grid-column: 1; margin: 0; }
}

@media (max-width: 620px) {
  .site-header { padding: 0 18px; }
  nav { gap: 14px; }
  nav a { font-size: .75rem; }
  .hero-content { width: calc(100% - 36px); padding-bottom: 74px; }
  .authors { font-size: .78rem; }
  .next-section { right: 18px; bottom: 18px; }
  .section-pad { padding: 70px 18px; }
  .lead-copy { padding-left: 18px; }
  .method-steps, .metric-grid, .efficiency-row, .data-stats, .data-evidence, .demo-grid { grid-template-columns: 1fr; }
  .method-steps li, .method-steps li + li { min-height: auto; padding: 24px 0 30px; border-right: 0; border-top: 1px solid var(--line); }
  .method-steps { border-top: 0; }
  .step-number { margin-bottom: 18px; }
  .metric-grid article { min-height: 124px; border-right: 0; border-top: 1px solid var(--line); }
  .metric-grid article:first-child { border-top: 0; }
  .resource-list a { grid-template-columns: 82px 1fr; gap: 14px; }
  footer { flex-direction: column; padding: 26px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}