:root {
  --ink: #171717;
  --muted: #5d6470;
  --soft: #f5f6f8;
  --line: #dde1e8;
  --panel: #ffffff;
  --accent: #c7511f;
  --accent-soft: #f7e5dc;
  --button: #2d2d2d;
  --button-hover: #151515;
  --shadow: 0 14px 34px rgb(15 23 42 / 8%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fbfbfc;
  font-family: BlinkMacSystemFont, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, ui-sans-serif, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100vw - 36px));
  margin: 0 auto;
}

.narrow {
  width: min(900px, calc(100vw - 36px));
}

.hero {
  padding: 64px 0 28px;
  background:
    radial-gradient(circle at 22% 12%, rgb(199 81 31 / 10%), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f8f9fb 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  text-align: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(54px, 8.5vw, 92px);
  font-weight: 780;
  line-height: 0.96;
  letter-spacing: 0;
}

.subtitle {
  max-width: 980px;
  margin: 0 auto 18px;
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 680;
  line-height: 1.15;
}

.authors {
  max-width: 930px;
  margin: 0 auto 8px;
  color: #273244;
  font-size: 18px;
  font-weight: 620;
}

.affiliations {
  max-width: 960px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 15px;
}

.button-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--button);
  color: #fff;
  font-weight: 720;
  text-decoration: none;
  box-shadow: 0 3px 10px rgb(0 0 0 / 14%);
  transition: background 130ms ease, transform 130ms ease;
}

.button:hover {
  background: var(--button-hover);
  transform: translateY(-1px);
}

.icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
}

.icon svg {
  display: block;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.section {
  padding: 54px 0;
}

.video-section {
  padding-top: 34px;
}

.band {
  background: #fff;
  border-block: 1px solid var(--line);
}

.section-heading {
  max-width: 940px;
  margin: 0 auto 24px;
  text-align: center;
}

h2 {
  margin-bottom: 16px;
  text-align: center;
  font-size: clamp(29px, 4vw, 42px);
  font-weight: 760;
  line-height: 1.15;
}

h3 {
  margin-bottom: 8px;
  font-size: 21px;
  line-height: 1.25;
}

.section-lead {
  max-width: 900px;
  margin: 0 auto 24px;
  color: #374151;
  text-align: center;
}

.video-card,
.figure-card,
.release-card,
.metric {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.video-card {
  padding: 10px;
}

.video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  background: #111827;
}

.page-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-block: 1px solid var(--line);
  background: rgb(255 255 255 / 92%);
  backdrop-filter: blur(10px);
}

.page-nav .container {
  display: flex;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  padding: 10px 0;
}

.page-nav a {
  color: #334155;
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
}

.page-nav a:hover {
  color: var(--accent);
}

.method-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.4fr);
  gap: 24px;
  align-items: center;
}

.method-grid article {
  color: #303846;
}

.check-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin: 10px 0;
  padding-left: 24px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.1em;
  color: var(--accent);
  content: "✓";
  font-weight: 800;
}

.figure-card {
  margin: 0;
  padding: 12px;
}

.figure-card.large {
  padding: 14px;
}

.figure-card img {
  display: block;
  width: 100%;
  border-radius: 6px;
}

figcaption {
  margin: 10px 4px 0;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.metric {
  padding: 18px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  margin: 6px 0;
  color: #1f2937;
  font-size: 29px;
  line-height: 1.1;
}

.metric p {
  margin: 0;
  color: #4b5563;
}

.split-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.release-card {
  padding: 22px;
}

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

.release-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.text-link {
  color: var(--accent);
  font-weight: 740;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #111827;
  color: #f8fafc;
  font-size: 13px;
  line-height: 1.55;
}

.footer {
  padding: 24px 0;
  color: var(--muted);
  text-align: center;
}

.footer p {
  margin: 0;
}

@media (max-width: 840px) {
  .method-grid,
  .split-figures,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 48px;
  }

  .section {
    padding: 42px 0;
  }
}

@media (max-width: 560px) {
  .container,
  .narrow {
    width: min(100vw - 24px, 1120px);
  }

  .button {
    min-width: 128px;
  }

  .page-nav .container {
    gap: 14px;
  }
}