:root {
  --paper: #f4f5ef;
  --paper-2: #e9ebe3;
  --white: #ffffff;
  --ink: #101720;
  --muted: #606a72;
  --line: #ccd1cb;
  --blue: #2552bd;
  --blue-dark: #0d2a6c;
  --green: #24d07a;
  --green-dark: #087443;
  --orange: #f1a06d;
  --radius: 18px;
  --page: min(1360px, calc(100vw - 56px));
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-160%);
  background: var(--ink);
  color: var(--white);
  padding: 10px 16px;
  border-radius: 8px;
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 100;
  width: var(--page);
  height: 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 0 12px 0 18px;
  border: 1px solid rgba(16, 23, 32, 0.14);
  border-radius: 16px;
  background: rgba(248, 249, 245, 0.88);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 40px rgba(15, 25, 34, 0.08);
  transform: translateX(-50%);
  transition: top 220ms ease, box-shadow 220ms ease;
}

.site-header.scrolled { top: 8px; box-shadow: 0 14px 50px rgba(15, 25, 34, 0.14); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand > span:last-child > span { color: var(--green-dark); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 35px;
  height: 35px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--green);
  font: 800 17px/1 var(--sans);
}

.site-nav { display: flex; justify-content: center; gap: clamp(14px, 2.1vw, 34px); }
.site-nav a {
  position: relative;
  color: #414b54;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -5px;
  height: 2px;
  background: var(--green-dark);
  transition: right 180ms ease;
}
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.nav-toggle { display: none; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 158px max(28px, calc((100vw - 1360px) / 2)) 72px;
  min-height: 100vh;
}

.hero-glow {
  position: absolute;
  z-index: -1;
  top: -16vw;
  right: -18vw;
  width: 66vw;
  height: 66vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(36, 208, 122, 0.18) 0, rgba(36, 208, 122, 0.04) 45%, transparent 69%);
  filter: blur(10px);
}

.hero-copy { max-width: 1120px; }
.eyebrow, .section-index, .mini-label {
  margin: 0 0 20px;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: 11px; }
.eyebrow span { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px rgba(36, 208, 122, 0.15); }

.hero h1 {
  max-width: 1100px;
  margin: 0;
  font-size: clamp(48px, 7.1vw, 104px);
  line-height: 0.96;
  letter-spacing: -0.058em;
}
.hero h1 em, .section-heading h2 em { color: var(--blue); font-family: var(--serif); font-weight: 400; }

.hero-intro {
  max-width: 760px;
  margin: 38px 0 0;
  color: #424c54;
  font-size: clamp(18px, 1.8vw, 24px);
  line-height: 1.5;
}
.hero-intro strong { color: var(--ink); }

.hero-actions, .citation-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 50px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: 12px;
  font: 750 14px/1 var(--sans);
  cursor: pointer;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--ink); color: var(--white); }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { background: transparent; color: var(--ink); }
.button-secondary:hover { background: var(--white); }

.release-note {
  display: flex;
  gap: 12px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.release-note span { color: var(--green-dark); font-weight: 800; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 72px 0 28px;
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  list-style: none;
}
.hero-stats li { padding: 25px 22px; border-left: 1px solid var(--line); }
.hero-stats li:last-child { border-right: 1px solid var(--line); }
.hero-stats strong { display: block; font-size: clamp(30px, 3.4vw, 52px); line-height: 1; letter-spacing: -0.04em; }
.hero-stats span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }

.figure-shell {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.65);
  box-shadow: 0 24px 80px rgba(30, 45, 55, 0.08);
}
.figure-shell.dark { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.16); box-shadow: none; }
.figure-label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 1px 2px 12px;
  color: var(--muted);
  font: 700 11px/1 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.figure-label span { color: var(--green-dark); }
.figure-shell.dark .figure-label { color: #9ba8b7; }
.figure-shell.dark .figure-label span { color: var(--green); }
.figure-shell > p { margin: 11px 3px 1px; color: var(--muted); font-size: 13px; }

.image-button { display: block; width: 100%; padding: 0; overflow: hidden; border: 0; border-radius: 11px; background: var(--white); cursor: zoom-in; }
.image-button img { width: 100%; height: auto; transition: transform 350ms ease; }
.image-button:hover img { transform: scale(1.008); }

.paper-strip {
  display: grid;
  grid-template-columns: .3fr 1.2fr 1fr;
  gap: 42px;
  align-items: start;
  padding: 62px max(28px, calc((100vw - 1360px) / 2));
  background: var(--ink);
  color: var(--white);
}
.paper-kicker { margin: 3px 0 0; color: var(--green); font-weight: 800; letter-spacing: .08em; }
.paper-strip h2 { margin: 0; font-size: clamp(24px, 3vw, 43px); line-height: 1.12; letter-spacing: -.035em; }
.authors { margin: 3px 0 0; color: #aab2ba; font-size: 14px; line-height: 1.8; }

.section { padding: 120px max(28px, calc((100vw - 1360px) / 2)); }
.section-heading { display: grid; grid-template-columns: .34fr 1.66fr; gap: 42px; align-items: start; margin-bottom: 70px; }
.section-heading h2 { max-width: 1050px; margin: 0; font-size: clamp(38px, 5vw, 72px); line-height: 1.04; letter-spacing: -.048em; }
.section-heading.inverse h2 { color: var(--white); }
.section-heading.inverse h2 em { color: var(--green); }
.section-heading.inverse .section-index { color: var(--green); }

.overview-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 100px; }
.overview-copy p { color: var(--muted); font-size: 17px; }
.overview-copy .lead { margin-top: 0; color: var(--ink); font-size: clamp(22px, 2.3vw, 32px); line-height: 1.35; letter-spacing: -.02em; }
.principles { border-top: 1px solid var(--line); }
.principles article { display: grid; grid-template-columns: 54px 1fr 1.25fr; gap: 20px; align-items: baseline; padding: 25px 0; border-bottom: 1px solid var(--line); }
.principles article > span { color: var(--blue); font: 700 12px/1 var(--mono); }
.principles h3 { margin: 0; font-size: 18px; }
.principles p { margin: 0; color: var(--muted); font-size: 14px; }

.dataset, .results { background: var(--ink); color: var(--white); }
.equation { display: flex; align-items: center; justify-content: space-between; padding: 30px; border: 1px solid rgba(255,255,255,.17); border-radius: var(--radius); }
.equation div { display: flex; flex-direction: column; }
.equation strong { color: var(--white); font-size: clamp(34px, 4vw, 58px); line-height: 1; }
.equation span { color: #8f9aa6; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.equation b { color: #63707f; font-size: 25px; }
.equation .equation-total { padding: 18px 24px; border-radius: 12px; background: var(--green); }
.equation .equation-total strong, .equation .equation-total span { color: var(--ink); }

.emotion-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 70px; padding: 0; list-style: none; }
.emotion-row li { padding: 7px 13px; border: 1px solid #394450; border-radius: 999px; color: #c0c7ce; font-size: 12px; }
.emotion-row li:first-child { background: var(--green); color: var(--ink); border-color: var(--green); }

.dataset-layout { display: grid; grid-template-columns: 1.18fr .82fr; gap: 70px; align-items: center; }
.dataset-details h3 { margin: 0 0 18px; max-width: 520px; font-size: clamp(28px, 3vw, 43px); line-height: 1.12; letter-spacing: -.035em; }
.dataset-details > p { color: #9eabb7; }
.spec-list { margin: 35px 0 0; border-top: 1px solid #34404b; }
.spec-list div { display: grid; grid-template-columns: 95px 1fr; gap: 20px; padding: 17px 0; border-bottom: 1px solid #34404b; }
.spec-list dt { color: var(--green); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.spec-list dd { margin: 0; color: #d0d6db; font-size: 14px; }

.asset-ribbon { margin-top: 80px; padding-top: 25px; border-top: 1px solid #34404b; }
.asset-ribbon > p { margin: 0 0 18px; color: #7f8b97; font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.asset-ribbon ul { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin: 0; padding: 0; list-style: none; }
.asset-ribbon li { padding: 16px; border-radius: 11px; background: #18212a; color: #d2d9df; font-size: 12px; }
.asset-ribbon li span { display: block; margin-bottom: 6px; color: var(--green); font: 750 14px/1 var(--mono); }

.benchmark-intro { max-width: 820px; margin: -28px 0 50px 34%; color: var(--muted); font-size: 18px; }
.track-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.track-card { min-height: 410px; display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.5); transition: background 200ms ease, transform 200ms ease; }
.track-card:hover { background: var(--white); transform: translateY(-3px); }
.track-top { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font: 700 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.track-top span { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 50%; color: var(--blue); }
.track-card h3 { max-width: 500px; margin: 45px 0 10px; font-size: clamp(25px, 3vw, 38px); line-height: 1.12; letter-spacing: -.03em; }
.track-card > p { max-width: 560px; margin: 0; color: var(--muted); }
.task-specs { display: grid; gap: 0; margin: auto 0 0; padding-top: 30px; }
.task-specs > div { display: grid; grid-template-columns: 86px 1fr; gap: 16px; padding: 11px 0; border-top: 1px solid var(--line); }
.task-specs dt { color: var(--blue); font: 800 10px/1.6 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.task-specs dd { margin: 0; color: #505b64; font-size: 12px; }

.qualitative { margin-top: 90px; padding: 32px; border-radius: 24px; background: var(--blue-dark); color: var(--white); }
.qualitative-header { display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: end; margin-bottom: 30px; }
.qualitative-header .mini-label { margin-bottom: 8px; color: var(--green); }
.qualitative-header h3 { max-width: 720px; margin: 0; font-size: clamp(30px, 3.6vw, 50px); line-height: 1.05; letter-spacing: -.04em; }
.qualitative-header > p { margin: 0; color: #b8c5d9; font-size: 14px; }
.qualitative-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; align-items: start; }
.qualitative-card { min-width: 0; margin: 0; padding: 14px; border: 1px solid rgba(255,255,255,.15); border-radius: 17px; background: #101c3a; }
.qualitative-audio, .qualitative-matting { grid-column: span 5; }
.qualitative-body, .qualitative-hand { grid-column: span 7; }
.qualitative-card .image-button { background: var(--white); }
.qualitative-card img { width: 100%; height: auto; object-fit: contain; }
.qualitative-card figcaption { padding: 18px 7px 5px; }
.qualitative-card figcaption > span { color: var(--green); font: 800 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.qualitative-card h4 { margin: 9px 0 8px; color: var(--white); font-size: 20px; line-height: 1.18; }
.qualitative-card figcaption p { margin: 0; color: #aebbd0; font-size: 12px; }

.results-protocol { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-top: -24px; padding: 20px 24px; border: 1px solid #35404a; border-radius: 14px; background: #151e27; }
.results-protocol p { max-width: 620px; margin: 0; color: #c8d0d7; }
.results-protocol ul { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; margin: 0; padding: 0; list-style: none; }
.results-protocol li { padding: 7px 10px; border-radius: 999px; background: #202c36; color: #9facb8; font: 700 10px/1 var(--mono); }
.results-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 16px; }
.result-card { min-width: 0; padding: 28px; border: 1px solid #35404a; border-radius: var(--radius); background: #151e27; box-shadow: 0 20px 60px rgba(0,0,0,.12); }
.result-card-wide { grid-column: 1 / -1; }
.result-card > header { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.result-card > header > span { display: grid; place-items: center; flex: 0 0 46px; height: 46px; border: 1px solid #40505d; border-radius: 13px; color: var(--green); font: 800 11px/1 var(--mono); letter-spacing: .04em; }
.result-card > header p { margin: 0 0 3px; color: #768491; font: 700 9px/1.3 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.result-card h3 { margin: 0; color: var(--white); font-size: clamp(20px, 2.2vw, 30px); line-height: 1.1; letter-spacing: -.025em; }
.table-shell { overflow-x: auto; border: 1px solid #303d48; border-radius: 13px; background: #101820; }
.result-table { width: 100%; min-width: 500px; border-collapse: collapse; font-size: 12px; }
.result-card-wide .result-table { min-width: 760px; }
.result-table th, .result-table td { padding: 12px 13px; border-bottom: 1px solid #27333d; text-align: left; vertical-align: top; }
.result-table thead th { background: #1d2933; color: #9ba8b4; font: 800 9px/1.4 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.result-table tbody th { color: #e1e7eb; font-weight: 700; }
.result-table tbody td { color: #aeb8c1; }
.result-table tbody tr:last-child > * { border-bottom: 0; }
.result-table tbody tr:hover > * { background: rgba(36,208,122,.045); }
.result-table strong { color: var(--green); font-weight: 800; }
.result-table .best-row > * { background: rgba(36,208,122,.07); }
.result-table-dense td { line-height: 1.7; }
.result-note { margin: 18px 2px 0; color: #8f9ca7; font-size: 12px; }
.analysis-heading { max-width: 900px; margin: 110px 0 0 34%; padding-top: 34px; border-top: 1px solid #34404b; }
.analysis-heading h3 { margin: 0; font-size: clamp(31px, 3.6vw, 52px); line-height: 1.08; letter-spacing: -.04em; }
.cross-task { display: grid; grid-template-columns: .36fr .64fr; gap: 64px; align-items: center; margin-top: 56px; }
.cross-task-copy h3 { margin: 0 0 20px; font-size: clamp(30px, 3.3vw, 47px); line-height: 1.1; }
.cross-task-copy > p { color: #9eabb6; }
.cross-task-copy ul { margin: 28px 0 0; padding: 0; list-style: none; border-top: 1px solid #34404b; }
.cross-task-copy li { display: flex; justify-content: space-between; gap: 18px; padding: 12px 0; border-bottom: 1px solid #34404b; color: #ccd3d9; font-size: 13px; }
.cross-task-copy li span { color: var(--green); font-weight: 750; }

.diagnostic-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 430px)); justify-content: center; gap: 22px; max-width: 940px; margin: 70px auto 0; }
.diagnostic-grid figure { margin: 0; padding: 18px; border: 1px solid #35404a; border-radius: var(--radius); background: #151e27; }
.diagnostic-grid img { width: 100%; max-height: 340px; object-fit: contain; border-radius: 10px; background: #fff; }
.diagnostic-grid figcaption { padding: 16px 5px 2px; color: #9eabb6; font-size: 13px; }
.diagnostic-grid strong { color: var(--white); }

.access { padding-top: 100px; }
.access .section-heading { margin-bottom: 42px; }
.access-status { display: grid; grid-template-columns: .34fr 1.66fr; gap: 42px; align-items: start; margin-bottom: 18px; padding: 22px 26px; border: 1px solid rgba(8, 116, 67, .22); border-radius: 14px; background: rgba(36, 208, 122, .08); }
.access-status > span { color: var(--green-dark); font: 800 11px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.access-status p { max-width: 900px; margin: 0; color: #3f5a4b; }
.access-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 16px; align-items: stretch; }
.access-panel, .download-card, .contact-card, .responsible-use { border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.access-panel { padding: 42px; }
.access-panel h3, .download-card h3, .contact-card h3, .responsible-use h3 { margin: 0; font-size: clamp(25px, 2.5vw, 36px); line-height: 1.12; letter-spacing: -.035em; }
.access-steps { counter-reset: access-step; display: grid; gap: 0; margin: 32px 0 0; padding: 0; list-style: none; }
.access-steps li { counter-increment: access-step; display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.access-steps li::before { content: counter(access-step, decimal-leading-zero); color: var(--green-dark); font: 800 12px/1.7 var(--mono); }
.access-steps strong { color: var(--ink); }
.access-steps code { color: var(--ink); font: 11px/1.5 var(--mono); }
.access-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.access-actions .button { min-height: 46px; font-size: 12px; }
.form-note { margin: 18px 0 0; color: var(--muted); font-size: 12px; }
.access-sidebar { display: grid; grid-template-rows: auto 1fr; gap: 16px; }
.download-card, .contact-card { padding: 34px; }
.download-card pre { margin: 24px 0 16px; padding: 20px; overflow-x: auto; border-radius: 11px; background: var(--ink); color: #dfe8e2; }
.download-card code { font: 11px/1.75 var(--mono); }
.download-card > p:last-child { margin: 0; color: var(--muted); font-size: 13px; }
.contact-list { display: grid; gap: 0; margin: 24px 0 0; }
.contact-list > div { padding: 18px 0; border-top: 1px solid var(--line); }
.contact-list dt { color: var(--muted); font: 800 10px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.contact-list dd { margin: 8px 0 0; font-size: 14px; }
.contact-list a, .access-panel a:not(.button) { color: var(--green-dark); }
.contact-list span { color: var(--muted); }
.responsible-use { display: grid; grid-template-columns: .78fr 1.22fr; gap: 60px; margin-top: 16px; padding: 42px; }
.responsible-use > div:first-child > p:last-child { color: var(--muted); }
.license-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 30px; margin: 0; padding: 0; list-style: none; }
.license-points li { position: relative; padding: 13px 0 13px 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.license-points li::before { content: ""; position: absolute; top: 21px; left: 0; width: 6px; height: 6px; border-radius: 50%; background: var(--green-dark); }
.ethics-note { margin: 18px 0 0; color: var(--muted); font-size: 11px; }

.citation { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: center; background: var(--green); }
.citation :focus-visible { outline-color: var(--ink); }
.citation-copy .section-index { color: var(--green-dark); }
.citation-copy h2 { margin: 0; font-size: clamp(40px, 5vw, 70px); line-height: 1; letter-spacing: -.05em; }
.citation-copy > p:not(.section-index) { max-width: 530px; color: #24513a; }
.citation .button-secondary { background: rgba(255,255,255,.25); }
.bibtex { min-width: 0; padding: 20px; border-radius: 18px; background: var(--ink); color: #dfe8e2; }
.bibtex > div { display: flex; justify-content: space-between; padding: 0 5px 14px; color: #77838d; font: 700 10px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.bibtex pre { margin: 0; padding: 22px; overflow-x: auto; border-radius: 11px; background: #0b1117; }
.bibtex code { font: 12px/1.75 var(--mono); }

footer { display: grid; grid-template-columns: 1fr 1.6fr 1fr; gap: 40px; align-items: center; padding: 40px max(28px, calc((100vw - 1360px) / 2)); background: var(--ink); color: var(--white); }
.footer-brand .brand-mark { background: var(--green); color: var(--ink); }
footer > p { color: #89949e; font-size: 12px; text-align: center; }
footer > div { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 20px; }
footer > div a { color: #b3bdc6; font-size: 12px; text-decoration: none; }

.lightbox { width: min(96vw, 1600px); max-width: none; max-height: 94vh; padding: 48px 16px 16px; border: 0; border-radius: 18px; background: #111820; }
.lightbox::backdrop { background: rgba(4, 8, 12, .86); backdrop-filter: blur(8px); }
.lightbox img { width: 100%; max-height: calc(94vh - 64px); object-fit: contain; border-radius: 9px; }
.lightbox button { position: absolute; top: 14px; right: 18px; border: 0; background: transparent; color: var(--white); font: 700 12px/1 var(--sans); cursor: pointer; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 620ms ease, transform 620ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  :root { --page: calc(100vw - 28px); }
  .site-header { grid-template-columns: auto 1fr auto; top: 10px; height: 58px; }
  .header-cta { display: none; }
  .nav-toggle { display: flex; flex-direction: column; justify-content: center; justify-self: end; gap: 6px; width: 38px; height: 38px; padding: 8px; border: 0; background: transparent; }
  .nav-toggle span:not(.sr-only) { display: block; width: 22px; height: 2px; background: var(--ink); transition: transform 180ms ease; }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: absolute; top: 66px; right: 0; left: 0; display: none; flex-direction: column; gap: 0; padding: 9px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); box-shadow: 0 20px 50px rgba(15,25,34,.16); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px; }
  .site-nav a::after { display: none; }
  .hero { padding-top: 128px; }
  .paper-strip, .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .paper-strip { gap: 20px; }
  .overview-grid, .dataset-layout, .cross-task, .citation { grid-template-columns: 1fr; gap: 54px; }
  .principles article { grid-template-columns: 42px 1fr; }
  .principles p { grid-column: 2; }
  .asset-ribbon ul { grid-template-columns: repeat(5, 1fr); }
  .benchmark-intro, .analysis-heading { margin-left: 0; }
  .qualitative-header { grid-template-columns: 1fr; gap: 18px; }
  .results-grid { grid-template-columns: 1fr; }
  .result-card-wide { grid-column: auto; }
  .results-protocol { align-items: flex-start; flex-direction: column; }
  .results-protocol ul { justify-content: flex-start; }
  .access-status { grid-template-columns: 1fr; gap: 8px; }
  .access-layout, .responsible-use { grid-template-columns: 1fr; }
}

@media (max-width: 660px) {
  .hero { padding-left: 18px; padding-right: 18px; padding-bottom: 54px; }
  .hero h1 { font-size: clamp(43px, 13.4vw, 62px); }
  .hero-intro { font-size: 18px; }
  .hero-actions .button { width: 100%; }
  .release-note { display: block; }
  .release-note span { display: block; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats li:nth-child(3) { border-top: 1px solid var(--line); }
  .hero-stats li:nth-child(4) { border-top: 1px solid var(--line); border-right: 1px solid var(--line); }
  .hero-stats strong { font-size: 34px; }
  .paper-strip, .section, .citation { padding-left: 18px; padding-right: 18px; }
  .section { padding-top: 84px; padding-bottom: 84px; }
  .section-heading { margin-bottom: 45px; }
  .section-heading h2 { font-size: clamp(37px, 11vw, 51px); }
  .equation { display: grid; grid-template-columns: 1fr auto 1fr; gap: 15px; }
  .equation div { align-items: center; }
  .equation b:nth-of-type(2) { display: none; }
  .equation .equation-total { grid-column: 1 / -1; align-items: center; }
  .emotion-row { margin-bottom: 50px; }
  .dataset-details h3 { font-size: 31px; }
  .asset-ribbon ul { grid-template-columns: repeat(2, 1fr); }
  .track-grid { grid-template-columns: 1fr; }
  .track-card { min-height: 390px; padding: 23px; }
  .benchmark-intro { margin-top: -12px; font-size: 16px; }
  .qualitative { padding: 16px; }
  .qualitative-grid { grid-template-columns: 1fr; }
  .qualitative-audio, .qualitative-body, .qualitative-hand, .qualitative-matting { grid-column: auto; }
  .results-protocol { margin-top: -12px; padding: 18px; }
  .result-card { padding: 18px; }
  .analysis-heading { margin-top: 80px; }
  .cross-task { margin-top: 45px; }
  .diagnostic-grid { grid-template-columns: 1fr; }
  .access { padding-top: 70px; }
  .access-panel, .download-card, .contact-card, .responsible-use { padding: 26px; }
  .access-actions .button { width: 100%; }
  .responsible-use { gap: 28px; }
  .license-points { grid-template-columns: 1fr; }
  .citation { gap: 45px; }
  .citation-actions .button { width: 100%; }
  .bibtex { padding: 12px; }
  .bibtex pre { padding: 15px; }
  footer { grid-template-columns: 1fr; text-align: left; }
  footer > p { text-align: left; }
  footer > div { justify-content: flex-start; }
}