:root {
  --text: #1f2328;
  --body: #3d444d;
  --muted: #6e7781;
  --line: #e3e6ea;
  --soft: #f6f8fa;
  --navy: #1b2f63;
  --navy-2: #2a4a94;
  --navy-soft: #eef2fb;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: #fff; color: var(--text);
  font-family: var(--sans); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--navy-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ---------- hero ---------- */
.hero {
  text-align: center; padding: 72px 20px 36px;
  background: linear-gradient(180deg, var(--navy-soft) 0%, #fff 100%);
}
.venue {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 14px; letter-spacing: .02em; color: var(--navy);
  background: #fff; border: 1px solid #d5ddf0; border-radius: 999px; padding: 5px 14px 5px 8px;
}
.venue img { height: 20px; }
.flag { font-size: 16px; }
.hero h1 {
  font-size: clamp(28px, 4.2vw, 44px); line-height: 1.2; letter-spacing: -0.02em;
  font-weight: 800; margin: 22px auto 22px; max-width: 920px;
}
.hero h1 .name { color: var(--navy); }
.authors { margin: 0; font-size: 19px; font-weight: 600; }
.authors span + span::before { content: "·"; margin: 0 14px; color: var(--muted); font-weight: 400; }
.affil {
  margin: 8px 0 0; color: var(--body); font-size: 15px;
  display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 6px;
}
.affil img { height: 22px; margin-right: 2px; }
.affil img:nth-of-type(2) { margin-left: 8px; }

.buttons { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  background: #1f2328; color: #fff; border-radius: 999px;
  padding: 9px 18px; font-size: 14px; font-weight: 600;
  transition: background .15s, transform .15s;
}
.btn:hover { background: var(--navy); text-decoration: none; transform: translateY(-1px); }
.btn svg { width: 16px; height: 16px; }
.btn small { font-weight: 500; opacity: .7; font-size: 12px; }
.btn.disabled { background: #fff; color: var(--muted); border: 1px solid var(--line); cursor: default; }
.btn.disabled:hover { transform: none; }

/* ---------- layout ---------- */
main { max-width: 960px; margin: 0 auto; padding: 0 20px; }
section { padding: 36px 0 12px; }
h2 {
  font-size: 28px; font-weight: 800; letter-spacing: -0.01em; text-align: center;
  margin: 0 0 22px;
}
h2::after { content: ""; display: block; width: 36px; height: 3px; background: var(--navy); border-radius: 2px; margin: 10px auto 0; }
h3.sub { font-size: 19px; font-weight: 700; margin: 36px 0 12px; display: flex; align-items: center; gap: 10px; }
.tag { font-size: 11px; font-weight: 600; color: var(--navy); background: var(--navy-soft); border-radius: 6px; padding: 2px 8px; text-transform: uppercase; letter-spacing: .05em; }
.unit { font-size: 13px; font-weight: 500; color: var(--muted); font-family: var(--mono); }
p { color: var(--body); }
#abstract p { text-align: justify; }

.teaser { padding-top: 28px; }
.teaser img, .figure img {
  display: block; width: 100%; border-radius: 14px;
  border: 1px solid var(--line); box-shadow: 0 10px 30px -18px rgba(27, 47, 99, .35);
}
.figure { margin: 0 0 24px; }

/* ---------- method steps ---------- */
.steps { display: grid; gap: 14px; }
.step {
  position: relative; padding: 18px 22px 8px 64px;
  border: 1px solid var(--line); border-radius: 14px; background: #fff;
}
.step .num {
  position: absolute; left: 20px; top: 18px;
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--navy); color: #fff; font-weight: 700; font-size: 14px;
}
.step h3 { margin: 2px 0 6px; font-size: 17px; }
.step p { margin: 0 0 10px; }
.step .eq { overflow-x: auto; }

/* ---------- dataset cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card {
  display: flex; flex-direction: column;
  border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: #fff;
}
.card h4 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0 0 12px; font-size: 14px; line-height: 1.55; }
.card dl { margin: 0 0 14px; font-size: 13px; }
.card dl div { display: flex; gap: 8px; padding: 4px 0; border-top: 1px dashed var(--line); }
.card dt { color: var(--muted); min-width: 68px; }
.card dd { margin: 0; color: var(--text); }
.hf {
  margin-top: auto; align-self: flex-start;
  font-size: 13px; font-weight: 600; color: var(--muted);
  border: 1px dashed #c9ced6; border-radius: 999px; padding: 4px 12px;
}
a.hf { color: var(--navy); border-style: solid; }
.note { font-size: 14px; color: var(--muted); text-align: center; margin-top: 14px; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; margin: 8px 0 6px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
th, td { padding: 8px 10px; text-align: center; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { background: var(--soft); font-weight: 600; color: var(--text); font-size: 13px; }
thead tr:first-child th[colspan] { border-left: 1px solid var(--line); }
.l { text-align: left; white-space: normal; }
tbody tr:last-child td { border-bottom: 0; }
tr.ours td, td.ours-c { background: var(--navy-soft); color: var(--navy); font-weight: 700; }
th.ours-h { color: var(--navy); }
tr.group td { border-top: 1px solid #cfd5dd; }
td[rowspan] { font-weight: 700; background: #fff; border-right: 1px solid var(--line); }
.caption { font-size: 13.5px; color: var(--muted); text-align: center; margin: 6px 0 0; }
.caption.left { text-align: left; margin: 0 0 6px; }
.setup { font-size: 15px; }

.highlights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 4px; }
.highlights div {
  text-align: center; padding: 14px 10px; border-radius: 12px;
  background: linear-gradient(180deg, var(--navy-soft), #fff); border: 1px solid #d5ddf0;
}
.highlights b { display: block; font-size: 30px; font-weight: 800; color: var(--navy); line-height: 1.1; }
.highlights span { font-size: 13px; color: var(--muted); }

/* ---------- footer ---------- */
footer { margin-top: 48px; padding: 28px 20px 40px; border-top: 1px solid var(--line); text-align: center; font-size: 14px; color: var(--muted); }
footer p { display: inline-flex; align-items: center; gap: 6px; margin: 0; color: var(--muted); }
footer img { height: 20px; }

/* ---------- mobile ---------- */
@media (max-width: 720px) {
  .hero { padding-top: 48px; }
  .cards { grid-template-columns: 1fr; }
  .highlights b { font-size: 24px; }
  .step { padding-left: 56px; }
  .step .num { left: 16px; }
}

/* paper figures and tables shown as images */
.figure.paper img { border-radius: 10px; box-shadow: none; padding: 14px; background: #fff; }
/* same text scale as Table 1: 1121px vs 3201px source width, plus padding */
.figure.paper.narrow { width: calc(35.0% + 28px); min-width: 260px; margin-left: auto; margin-right: auto; }

/* BibTeX */
.bibtex {
  margin: 0; min-height: 120px; padding: 18px 20px; overflow-x: auto;
  background: var(--soft); border: 1px solid var(--line); border-radius: 12px;
  font-family: var(--mono); font-size: 13px; line-height: 1.6; color: var(--text);
}

/* FINGER support-image grids */
.grids { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 14px; }
.grids a { display: block; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; transition: border-color .15s, box-shadow .15s; }
.grids a:hover { border-color: #c9d4ee; box-shadow: 0 8px 24px -16px rgba(27, 47, 99, .45); }
.grids img { display: block; width: 100%; }
@media (max-width: 720px) { .grids { grid-template-columns: 1fr; } }

/* inline SVG teaser (references the full-resolution Figure 1) */
.teaser-anim { display: block; width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--line); box-shadow: 0 10px 30px -18px rgba(27, 47, 99, .35); }

/* venue badge without logo; NeurIPS logo on the Paper button */
.venue { padding-left: 12px; }
.btn-logo { height: 18px; width: auto; display: block; }

/* larger venue badge */
.venue { font-size: 19px; gap: 10px; padding: 8px 20px; }
.venue .flag { font-size: 22px; }
/* logos on dark buttons sit on a small white chip */
.btn:not(.disabled) .btn-logo { background: #fff; border-radius: 5px; padding: 2px 3px; height: 20px; }