:root {
  --paper: #f3f1ec;
  --paper-deep: #e9e5dd;
  --ink: #18191b;
  --muted: #65666b;
  --line: rgba(24, 25, 27, 0.14);
  --blue: #4f78c8;
  --blue-dark: #315da9;
  --blue-soft: #dbe7fb;
  --white: #fff;
  --radius-lg: 32px;
  --radius-md: 22px;
  --shadow: 0 26px 70px rgba(30, 34, 45, 0.12);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

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

button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1240px, calc(100% - 48px));
  height: 76px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 83%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(24, 25, 27, 0.18);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.38);
  color: var(--ink);
  font-size: 15px;
  font-weight: 750;
  letter-spacing: -0.04em;
  line-height: 1;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

nav { display: flex; gap: 28px; }

nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 560;
  text-decoration: none;
}

nav a:hover { color: var(--ink); }

.section-shell {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.hero {
  padding: clamp(72px, 9vw, 132px) 0 92px;
  text-align: center;
}

.eyebrow,
.section-kicker,
.metric-label {
  margin: 0 0 18px;
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 1040px;
  margin: 0 auto;
  font-size: clamp(43px, 6vw, 82px);
  font-weight: 560;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.hero h1 span {
  display: block;
  margin-bottom: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.08em;
  font-style: italic;
  font-weight: 500;
  letter-spacing: -0.06em;
}

.hero-deck {
  max-width: 720px;
  margin: 34px auto 28px;
  color: #4e5056;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(20px, 2.3vw, 28px);
  line-height: 1.35;
}

.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 27px;
  margin-top: 30px;
  font-size: 16px;
  font-weight: 650;
}

.authors a {
  text-decoration-color: rgba(24, 25, 27, 0.3);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.authors a:hover,
.authors a:focus-visible {
  color: var(--blue-dark);
  text-decoration-color: currentColor;
}

.authors sup, .affiliations sup { color: var(--blue-dark); }

.affiliations {
  margin: 10px auto 0;
  color: var(--muted);
  font-size: 13px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 32px 0 54px;
}

.action {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  gap: 9px;
  padding: 0 19px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 670;
  text-decoration: none;
}

.action svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.action-primary { background: var(--ink); color: var(--white); }
.action-primary:hover { background: var(--blue-dark); }
.action-secondary:hover { border-color: rgba(24, 25, 27, 0.34); background: rgba(255, 255, 255, 0.46); }

.action-muted { color: #68696e; cursor: default; }
.action small { color: #86878b; font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; }

.hero-media {
  position: relative;
  aspect-ratio: 16 / 8.5;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #cbd4e1;
  box-shadow: var(--shadow);
  text-align: left;
}

.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-shade {
  position: absolute;
  inset: auto 0 0;
  height: 36%;
  background: linear-gradient(transparent, rgba(7, 11, 17, 0.58));
}

.media-label {
  position: absolute;
  left: 28px;
  bottom: 23px;
  margin: 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 13px;
}

.media-label span {
  display: block;
  color: #fff;
  font-size: 17px;
  font-weight: 680;
}

.video-toggle {
  position: absolute;
  right: 22px;
  bottom: 22px;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.48);
  border-radius: 50%;
  background: rgba(9, 12, 17, 0.38);
  color: #fff;
  backdrop-filter: blur(14px);
  cursor: pointer;
}

.video-toggle svg {
  width: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.video-toggle .play-icon { display: none; fill: currentColor; stroke: none; }
.video-toggle.is-paused .pause-icon { display: none; }
.video-toggle.is-paused .play-icon { display: block; }

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 34px;
  border-block: 1px solid var(--line);
}

.stat-strip div {
  display: flex;
  min-height: 118px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px;
}

.stat-strip div + div { border-left: 1px solid var(--line); }
.stat-strip strong { font-family: Georgia, serif; font-size: 40px; font-weight: 400; }
.stat-strip span { max-width: 90px; color: var(--muted); font-size: 12px; line-height: 1.25; text-align: left; text-transform: uppercase; }

.idea, .method, .results, .deployment, .abstract { padding: 112px 0; }

.idea-grid, .abstract-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(48px, 9vw, 120px);
  margin-bottom: 64px;
}

h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(38px, 5vw, 66px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.03;
}

.idea-grid p, .abstract-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.idea-grid .lead {
  margin-bottom: 22px;
  color: var(--ink);
  font-size: 25px;
  font-weight: 560;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.image-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.46);
}

.image-frame img { width: 100%; height: auto; }
.teaser-frame img { padding: 26px 26px 10px; }

figcaption {
  padding: 14px 24px 20px;
  color: var(--muted);
  font-size: 12px;
}

.method {
  width: min(1280px, calc(100% - 32px));
  padding-inline: clamp(22px, 4vw, 52px);
  border-radius: 46px;
  background: #16181c;
  color: #f5f5f3;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  align-items: end;
  gap: 70px;
  margin-bottom: 56px;
}

.section-heading > p {
  margin: 0;
  color: #a8a9ae;
}

.method .section-kicker { color: #9db9ef; }
.method-figure { border-color: rgba(255, 255, 255, 0.14); background: #f8f8f7; }
.method-figure img { padding: 12px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 54px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.13);
}

.feature-grid article { min-height: 292px; padding: 30px; background: #1f2227; }
.feature-index { color: #9db9ef; font-family: Georgia, serif; font-style: italic; }
.feature-grid h3 { margin: 60px 0 14px; font-size: 21px; letter-spacing: -0.025em; }
.feature-grid p { margin: 0; color: #acaeb4; font-size: 15px; }

.results-heading > p, .deployment .section-heading > p { color: var(--muted); }

.evidence-tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
}

.evidence-tabs button {
  min-height: 42px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}

.evidence-tabs button[aria-selected="true"] { background: var(--ink); color: #fff; }

.evidence-panel {
  display: grid;
  grid-template-columns: minmax(290px, 0.66fr) minmax(0, 1.34fr);
  min-height: 480px;
  margin-top: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.5);
}

.evidence-panel[hidden] { display: none; }

.metric-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(28px, 5vw, 60px); }
.metric-copy .metric-label { margin-bottom: 12px; }
.metric-value { margin: 0 0 22px; font-family: Georgia, serif; font-size: clamp(48px, 6vw, 78px); letter-spacing: -0.06em; line-height: 1; }
.metric-value span { font-size: 0.42em; }
.metric-value i { color: #9a9ba0; font-size: 0.5em; font-weight: 400; }
.metric-copy h3 { margin: -10px 0 18px; font-size: 15px; letter-spacing: -0.015em; }
.metric-copy > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }

.training-panel { grid-template-columns: minmax(290px, 0.64fr) minmax(0, 1.36fr); }

.training-comparison {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 4vw, 54px);
  background: linear-gradient(145deg, #edf3fc, #e3ebf8);
}

.comparison-header,
.training-row {
  display: grid;
  grid-template-columns: minmax(190px, 1.5fr) minmax(82px, 0.5fr) minmax(82px, 0.5fr);
  align-items: center;
  gap: 18px;
}

.comparison-header {
  padding: 0 22px 10px;
  color: #717989;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.comparison-header span:not(:first-child) { text-align: right; }

.training-row {
  min-height: 82px;
  padding: 15px 22px;
  border-top: 1px solid rgba(49, 93, 169, 0.15);
}

.training-row.is-highlighted {
  margin: 0 -4px 8px;
  padding-inline: 26px;
  border: 0;
  border-radius: 18px;
  background: var(--blue-dark);
  color: #fff;
  box-shadow: 0 16px 34px rgba(49, 93, 169, 0.18);
}

.training-row > div { display: flex; flex-direction: column; }
.training-row > div > strong { font-size: 15px; }
.training-row > div > span { margin-top: 3px; color: #737b89; font-size: 11px; }
.training-row.is-highlighted > div > span { color: rgba(255, 255, 255, 0.68); }
.training-row > strong { font-family: Georgia, serif; font-size: 22px; font-weight: 400; text-align: right; }
.training-row.is-highlighted > strong { font-size: 27px; }

.training-insights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 16px;
}

.training-insights p {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid rgba(49, 93, 169, 0.13);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.48);
  color: #666e7d;
  font-size: 11px;
  line-height: 1.45;
}

.training-insights span { display: block; margin-bottom: 4px; color: var(--blue-dark); font-size: 10px; font-weight: 760; letter-spacing: 0.06em; text-transform: uppercase; }

.comparison-list { display: flex; flex-direction: column; justify-content: center; gap: 29px; padding: clamp(32px, 6vw, 78px); background: #dce6f7; }
.comparison-list div { position: relative; display: grid; grid-template-columns: 1fr auto; gap: 14px; padding-bottom: 11px; }
.comparison-list div::after { position: absolute; right: 0; bottom: 0; left: 0; height: 4px; border-radius: 4px; background: rgba(49, 93, 169, 0.13); content: ""; }
.comparison-list i { position: absolute; bottom: 0; left: 0; z-index: 1; width: var(--width); height: 4px; border-radius: 4px; background: var(--blue-dark); }
.comparison-list span { font-size: 14px; font-weight: 630; }
.comparison-list strong { font-family: Georgia, serif; font-size: 22px; font-weight: 400; }
.comparison-list > p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }

.deployment-figure { background: #fff; }
.deployment-figure img { padding: 18px; }

.abstract { border-top: 1px solid var(--line); }
.abstract-grid h2 { font-size: clamp(34px, 4vw, 54px); }

.citation { padding: 42px 0 112px; }
.citation-card {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 70px;
  padding: clamp(34px, 6vw, 76px);
  border-radius: var(--radius-lg);
  background: var(--blue-soft);
}

.citation-card h2 { font-size: clamp(38px, 5vw, 62px); }
.citation-card > div > p:last-child { color: #5b6170; }
.bibtex-wrap { position: relative; align-self: stretch; }
.bibtex-wrap pre { height: 100%; margin: 0; overflow-x: auto; padding: 54px 24px 24px; border-radius: 18px; background: rgba(255, 255, 255, 0.62); color: #303643; font: 12px/1.65 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; white-space: pre-wrap; }
.bibtex-wrap button { position: absolute; top: 12px; right: 12px; min-height: 32px; padding: 0 12px; border: 1px solid rgba(49, 93, 169, 0.2); border-radius: 999px; background: #fff; color: var(--blue-dark); font: inherit; font-size: 11px; font-weight: 700; cursor: pointer; }

footer {
  display: flex;
  width: min(1180px, calc(100% - 48px));
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin: 0 auto;
  padding: 48px 0 58px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.footer-brand { margin-bottom: 10px; }
footer p { margin: 0; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.75s ease, transform 0.75s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 820px) {
  .site-header { width: min(100% - 32px, 1180px); }
  nav { gap: 18px; }
  nav a:nth-child(2), nav a:nth-child(3) { display: none; }
  .section-shell { width: min(100% - 32px, 1180px); }
  .hero { padding-top: 62px; }
  .hero-media { aspect-ratio: 4 / 3; border-radius: 24px; }
  .hero-media video { object-position: center; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat-strip div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .stat-strip div:nth-child(4) { border-top: 1px solid var(--line); }
  .idea-grid, .abstract-grid, .section-heading, .citation-card, .evidence-panel { grid-template-columns: 1fr; }
  .idea-grid, .abstract-grid, .section-heading { gap: 34px; }
  .method { width: calc(100% - 20px); padding-inline: 18px; border-radius: 32px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 220px; }
  .feature-grid h3 { margin-top: 42px; }
  .training-panel { grid-template-columns: 1fr; }
  .training-comparison { min-height: 430px; }
  .citation-card { gap: 36px; }
  footer { width: calc(100% - 32px); align-items: flex-start; flex-direction: column; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .site-header { height: 64px; }
  .hero { padding-top: 48px; }
  .hero h1 { font-size: 42px; }
  .hero-deck { font-size: 19px; }
  .hero-actions { margin-bottom: 34px; }
  .hero-media { aspect-ratio: 3 / 4; }
  .media-label { left: 18px; bottom: 18px; max-width: 70%; }
  .video-toggle { right: 16px; bottom: 16px; }
  .stat-strip strong { font-size: 34px; }
  .idea, .method, .results, .deployment, .abstract { padding-top: 82px; padding-bottom: 82px; }
  .teaser-frame img, .deployment-figure img { padding: 8px 8px 0; }
  .evidence-tabs { display: grid; grid-template-columns: 1fr 1fr; width: 100%; }
  .evidence-tabs button { padding-inline: 8px; }
  .metric-copy { padding: 34px 26px; }
  .training-comparison { min-height: 0; padding: 26px 16px; }
  .comparison-header { grid-template-columns: 1fr 1fr; gap: 8px; padding-inline: 12px; }
  .comparison-header span:first-child { display: none; }
  .comparison-header span:nth-child(2) { text-align: left; }
  .training-row { grid-template-columns: 1fr 1fr; gap: 8px; min-height: 102px; padding-inline: 12px; }
  .training-row > div { grid-column: 1 / -1; }
  .training-row > strong:nth-child(2) { text-align: left; }
  .training-row.is-highlighted { padding-inline: 16px; }
  .training-row > div > span { font-size: 9px; }
  .training-row > strong { font-size: 17px; }
  .training-row.is-highlighted > strong { font-size: 20px; }
  .training-insights { grid-template-columns: 1fr; }
  .comparison-list { padding: 34px 26px; }
  .citation { padding-bottom: 80px; }
  .citation-card { padding: 28px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}