:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f6f8fc;
  --surface-muted: #fbfcff;
  --text: #172033;
  --muted: #55627d;
  --line: #dfe5f1;
  --primary: #4c6ef5;
  --primary-deep: #27344d;
  --primary-soft: #eef2ff;
  --shadow: 0 10px 28px rgba(22, 32, 51, 0.08);
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: min(1080px, calc(100vw - 2rem));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.page-glow {
  display: none;
}

.site-header {
  position: relative;
  border-bottom: 1px solid #edf1f7;
  background: #fff;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  font-family: "Outfit", "Plus Jakarta Sans", sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--primary);
}

.hero {
  padding: 3.1rem 0 1.7rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 1.4rem;
}

.hero-copy {
  max-width: 980px;
  text-align: center;
}

.eyebrow,
.section-kicker,
.info-card-label {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow {
  font-size: 1.6rem;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Outfit", "Plus Jakarta Sans", sans-serif;
  letter-spacing: -0.045em;
  line-height: 1.12;
}

h1 {
  max-width: 50ch;
  margin: 0 auto;
  font-size: clamp(2.45rem, 3vw, 4.35rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.9rem, 3vw, 2.7rem);
  font-weight: 700;
}

h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.hero-summary,
.section-copy,
.hero-note,
.affiliations,
.info-card p,
.media-card p,
.resource-card p,
.abstract-card p,
.timeline-step p,
.hero-media figcaption,
.footer-inner {
  color: var(--muted);
}

.hero-summary {
  max-width: 900px;
  margin: 1.2rem auto 1rem;
  font-size: 1.05rem;
}

.author-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem 1rem;
  margin: 0.95rem 0 0.45rem;
}

.author-row span {
  color: var(--primary);
  font-size: 1.02rem;
  font-weight: 600;
}

.affiliations {
  margin: 0 0 1.25rem;
  font-size: 1rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.2rem;
  border-radius: 14px;
  background: var(--primary-deep);
  color: #ffffff;
  box-shadow: 0 7px 18px rgba(39, 52, 77, 0.16);
  font-size: 0.98rem;
  font-weight: 700;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(39, 52, 77, 0.22);
  background: #1d2740;
}

.button-primary {
  background: #1f2a44;
}

.hero-note {
  margin: 1.2rem 0 0;
  font-size: 1.2rem;
}

.hero-media {
  width: min(960px, 100%);
  padding: 0.75rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid #d7e3ff;
  background: var(--primary-soft);
  box-shadow: 0 8px 24px rgba(22, 32, 51, 0.06);
}

.hero-media img,
.hero-media video {
  width: 100%;
  border-radius: 12px;
  background: #ffffff;
}

.hero-media figcaption {
  padding: 0.9rem 0.4rem 0.15rem;
  text-align: center;
  font-size: 0.94rem;
}

.section {
  padding: 1.6rem 0 2.4rem;
}

.section-alt {
  background: transparent;
}

.section-stack {
  display: grid;
  gap: 1.25rem;
}

.section-heading {
  display: grid;
  gap: 0.55rem;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.abstract-card {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.45rem 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

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

.info-card {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.info-card p:last-child {
  margin-bottom: 0;
}

.method-grid,
.resource-grid,
.citation-grid {
  display: grid;
  gap: 1.3rem;
}

.method-grid {
  grid-template-columns: 1fr;
}

.method-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.timeline-step {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.timeline-step + .timeline-step {
  border-top: 1px solid var(--line);
}

.timeline-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
  height: 3rem;
  margin-bottom: 0.85rem;
  padding: 0 0.85rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
}

.results-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.results-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.results-table th,
.results-table td {
  padding: 0.8rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: center;
  vertical-align: top;
}

.results-table th {
  background: #f8faff;
  color: var(--text);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  text-transform: none;
  white-space: nowrap;
  text-align: center;
  vertical-align: middle;
}

.results-table th sub {
  font-size: 0.72em;
  vertical-align: sub;
}

.results-table .rowspan-head,
.results-table .group-head,
.results-table .metric-head {
  text-align: center;
  vertical-align: middle;
}

.results-table thead .rowspan-head {
  text-align: left;
}

.results-table tbody td:nth-child(-n + 4) {
  text-align: left;
}

.results-table tbody td:nth-child(n + 5) {
  text-align: center;
}

.results-table tbody tr:hover {
  background: #fbfcff;
}

.results-highlight {
  background: var(--primary-soft);
}

.results-highlight td:first-child {
  font-weight: 800;
}

.results-divider td {
  border-top: 2px solid #bfcbe6;
}

.results-note {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.qual-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.qual-card {
  padding: 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.qual-card video {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: #eef2ff;
  max-height: 520px;
  object-fit: contain;
}

.qual-card h3 {
  margin-top: 0.9rem;
  font-size: 1.05rem;
}

.qual-card p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.resource-grid,
.citation-grid {
  grid-template-columns: 1fr;
}

.resource-card,
.resource-list,
.citation-card {
  max-width: 980px;
  margin: 0 auto;
  width: 100%;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.resource-card {
  text-align: center;
}

.resource-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.resource-list a {
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  text-align: center;
  font-weight: 700;
}

.resource-list a:hover,
.resource-list a:focus-visible {
  border-color: #c8d4ee;
  color: var(--primary);
}

.citation-card {
  background: #fbfcff;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

code,
pre {
  font-family: "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
  font-size: 0.93rem;
  line-height: 1.7;
}

.site-footer {
  padding: 0.4rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: center;
  gap: 2rem;
  font-size: 0.92rem;
  text-align: center;
}

.reveal {
  animation: fade-up 580ms ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .highlights-grid,
  .method-panel,
  .resource-list {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.3rem;
  }
}

@media (max-width: 560px) {
  .header-inner,
  .site-nav {
    flex-direction: column;
    align-items: center;
  }

  .hero {
    padding-top: 2.4rem;
  }

  h1 {
    max-width: none;
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .author-row {
    gap: 0.4rem 0.8rem;
  }
}