:root {
  color-scheme: light;
  --paper: #f7f4ed;
  --surface: #fffdfa;
  --surface-2: #f0eee8;
  --ink: #161616;
  --muted: #5f625f;
  --line: #d9d4c8;
  --red: #bc3f32;
  --teal: #177b78;
  --gold: #b87912;
  --green: #2f7d44;
  --shadow: 0 18px 45px rgba(26, 24, 20, 0.11);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(247, 244, 237, 0.96), rgba(247, 244, 237, 1) 36rem),
    var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

img,
video {
  display: block;
  max-width: 100%;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(217, 212, 200, 0.8);
  background: rgba(247, 244, 237, 0.88);
  backdrop-filter: blur(18px);
}

.topbar-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  gap: 20px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.research-navbar {
  display: flex;
  align-items: center;
  gap: 4px;
}

.research-home,
.research-trigger {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #41443f;
  padding: 0 12px;
  font: inherit;
  font-size: 14px;
  font-weight: 520;
  text-decoration: none;
  cursor: pointer;
}

.research-home:hover,
.research-trigger:hover,
.research-dropdown:focus-within .research-trigger,
.research-dropdown:hover .research-trigger {
  background: var(--surface-2);
  color: var(--ink);
}

.research-trigger::after {
  content: "";
  width: 7px;
  height: 7px;
  margin-left: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.research-dropdown {
  position: relative;
}

.research-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 250px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 250, 0.98);
  box-shadow: 0 18px 38px rgba(35, 30, 21, 0.13);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 150ms ease, transform 150ms ease, visibility 150ms ease;
}

.research-menu a {
  display: block;
  border-radius: 6px;
  color: #343631;
  padding: 9px 11px;
  font-size: 14px;
  font-weight: 560;
  text-decoration: none;
}

.research-menu a:hover {
  background: var(--surface-2);
}

.research-menu span {
  color: #9b332a;
  font-weight: 560;
}

.research-dropdown:hover .research-menu,
.research-dropdown:focus-within .research-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  padding: 7px 10px;
  border-radius: 999px;
}

.nav a:hover {
  color: var(--ink);
  background: var(--surface-2);
}

.hero {
  width: min(1260px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 24px;
}

.hero h1 {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 0 14px;
  border-bottom: 1px solid rgba(95, 98, 95, 0.16);
  text-align: center;
  color: #252821;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(54px, 7.4vw, 92px);
  font-weight: 500;
  line-height: 0.96;
  letter-spacing: 0;
}

.subtitle {
  max-width: 880px;
  margin: 18px auto 0;
  text-align: center;
  color: #444842;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(21px, 2.45vw, 31px);
  font-weight: 420;
  line-height: 1.26;
}

.meta {
  margin: 26px auto 0;
  max-width: 980px;
  text-align: center;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.55;
}

.authors {
  margin: 16px auto 0;
  max-width: 980px;
  text-align: center;
  color: #4d514b;
  font-size: clamp(15px, 1.18vw, 17px);
  line-height: 1.8;
}

.authors p {
  margin: 0;
}

.authors a {
  color: #3e433e;
  font-weight: 430;
  text-decoration-color: rgba(23, 123, 120, 0.25);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.authors a:hover {
  color: #177b78;
  text-decoration-color: rgba(23, 123, 120, 0.55);
}

.authors span {
  color: rgba(95, 98, 95, 0.54);
  margin: 0 8px;
}

.authors .affiliations {
  margin-top: 7px;
  color: #6b6e68;
  font-size: clamp(13px, 1vw, 15px);
}

.actions {
  margin: 18px auto 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  appearance: none;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--surface);
  padding: 12px 18px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 730;
}

.button.secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}

.hero-video {
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #0f1110;
  box-shadow: var(--shadow);
}

.hero-video video {
  width: 100%;
  background: #0f1110;
}

.caption {
  color: var(--muted);
  font-size: 14px;
}

.hero-video .caption,
.figure .caption {
  padding: 12px 14px 14px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}

main {
  padding-bottom: 80px;
}

.section {
  width: min(var(--max), calc(100% - 32px));
  margin: 72px auto 0;
}

.section-header {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(260px, 0.44fr);
  gap: 40px;
  align-items: end;
  margin-bottom: 26px;
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--red);
  font-weight: 780;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.12em;
}

h2 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(31px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: 0;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat,
.method-step,
.video-cell,
.scenario-panel,
.insight,
.citation-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(35, 30, 21, 0.06);
}

.stat {
  padding: 18px;
}

.stat strong {
  display: block;
  color: var(--ink);
  font-size: 31px;
  line-height: 1;
  margin-bottom: 7px;
}

.stat span {
  color: var(--muted);
  font-size: 14px;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.method-step {
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.step-index {
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 24px;
}

.method-step h3,
.insight h3,
.scenario-copy h3 {
  margin: 0 0 9px;
  font-size: 18px;
  line-height: 1.2;
}

.method-step p,
.insight p,
.scenario-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.figure {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
}

.figure img {
  width: 100%;
  background: white;
}

.comparison-shell {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.comparison-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 360px);
  gap: 18px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #fbfaf5;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab,
.scenario-select {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  min-height: 40px;
  padding: 0 14px;
  font: inherit;
  font-size: 14px;
}

.tab {
  cursor: pointer;
  font-weight: 720;
}

.tab[aria-selected="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--surface);
}

.scenario-select {
  width: 100%;
  border-radius: 6px;
}

.scenario-panel {
  margin: 16px;
  padding: 16px;
  box-shadow: none;
}

.scenario-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
  margin-bottom: 15px;
}

.scenario-kicker {
  margin: 0 0 5px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scenario-title {
  margin: 0;
  font-size: 22px;
  line-height: 1.15;
}

.score-pill {
  white-space: nowrap;
  border: 1px solid rgba(47, 125, 68, 0.32);
  background: rgba(47, 125, 68, 0.08);
  color: #206134;
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 780;
  font-size: 13px;
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.video-cell {
  overflow: hidden;
  box-shadow: none;
}

.video-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: #fbfaf5;
  font-size: 13px;
  font-weight: 780;
}

.video-label span:last-child {
  color: var(--muted);
  font-weight: 650;
}

.video-cell video {
  width: 100%;
  aspect-ratio: 11 / 3;
  background: #111;
}

.compare-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.insight {
  padding: 18px;
}

.insight .metric {
  color: var(--red);
  font-size: 29px;
  font-weight: 820;
  line-height: 1.08;
  margin-bottom: 14px;
  white-space: nowrap;
}

.scenario-strip {
  display: grid;
  grid-template-columns: minmax(260px, 0.38fr) minmax(0, 1fr);
  gap: 26px;
  align-items: center;
}

.scenario-copy {
  padding-right: 10px;
}

.asset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.citation-box {
  padding: 18px;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  color: #2d2d2b;
}

.footer {
  width: min(var(--max), calc(100% - 32px));
  margin: 64px auto 0;
  padding: 28px 0 45px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.public-only,
.submission-only {
  display: none;
}

body[data-version="public"] .public-only,
body[data-version="submission"] .submission-only {
  display: revert;
}

body[data-version="submission"] .hide-in-submission {
  display: none;
}

@media (max-width: 860px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 0;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 42px;
  }

  .section-header,
  .comparison-controls,
  .scenario-strip {
    grid-template-columns: 1fr;
  }

  .overview-grid,
  .method-steps,
  .gallery-grid,
  .asset-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .scenario-head {
    flex-direction: column;
  }

  .score-pill {
    white-space: normal;
  }
}