:root {
  --ink: #1c2430;
  --muted: #5b6573;
  --line: #e4e7ec;
  --paper: #f6f7f9;
  --card: #ffffff;
  --accent: #1f4d63;
  --accent-soft: #e8f1f4;
  --good: #1b7f4a;
  --stage: #12181f;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 36px 22px 72px;
}

header { text-align: center; }

.badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

h1.title {
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.subtitle {
  color: var(--muted);
  font-size: 18px;
  margin: 0 auto 22px;
  max-width: 720px;
}

.authors { margin: 0 0 8px; line-height: 1.85; }
.authors .author-line { display: block; }
.authors a { font-weight: 600; }
.equal { color: var(--muted); font-size: 14px; margin: 0; }

.affils {
  color: var(--muted);
  font-size: 14.5px;
  margin: 10px auto 22px;
  max-width: 760px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 8px 0 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: #fff;
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 600;
  font-size: 15px;
}

.btn:hover {
  background: var(--ink);
  color: #fff;
  text-decoration: none;
}

.teaser {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  display: block;
}

.caption {
  color: var(--muted);
  font-size: 14.5px;
  margin: 10px 0 0;
}

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 22px;
  align-items: start;
}

#dataset .lead,
#method .lead {
  max-width: none;
}

.copy p {
  margin: 0 0 14px;
}

.shot {
  margin: 16px 0 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}

.split .shot { margin: 0; }

.shot img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  background: #fff;
}

.shot figcaption {
  color: var(--muted);
  font-size: 14.5px;
  margin: 10px 2px 2px;
  line-height: 1.5;
}

.stats.compact {
  grid-template-columns: 1fr 1fr;
  margin: 0;
}

.shot + .grid { margin-top: 14px; }

.num {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  vertical-align: 1px;
}

section { margin-top: 48px; }

h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.lead {
  margin: 0 0 16px;
  max-width: 760px;
}

.abstract {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
}

.kws { margin-top: 12px; color: var(--muted); font-size: 14.5px; }

.videos {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

.video-card h3 {
  margin: 12px 0 4px;
  font-size: 16.5px;
}

.video-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
}

.stage {
  height: 460px;
  background: var(--stage);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.stage video {
  max-width: 100%;
  max-height: 100%;
  background: var(--stage);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 14px;
}

.stat {
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 16px 10px;
  text-align: center;
}

.stat b {
  display: block;
  font-size: 24px;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat span { color: var(--muted); font-size: 13px; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 16px 14px;
}

.card h3 { margin: 0 0 6px; font-size: 16.5px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  margin-top: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

th, td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

th { background: #f4f6f8; font-weight: 650; }
td:first-child, th:first-child { text-align: left; }
tr.ours td { font-weight: 700; background: #f3faf6; }
.best { color: var(--good); }
.note { color: var(--muted); font-size: 14.5px; margin: 8px 0 0; }

pre {
  background: #111827;
  color: #e5e7eb;
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.5;
}

footer {
  margin-top: 48px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

@media (max-width: 860px) {
  .videos, .grid, .split { grid-template-columns: 1fr; }
  .stage { height: auto; }
  .stage video { width: 100%; max-height: 70vh; }
  .stats { grid-template-columns: 1fr 1fr; }
}