/* TAIL-Safe — academic project page */
:root{
  --bg:#fafaf7;
  --paper:#ffffff;
  --ink:#1b1d22;
  --ink-soft:#3b3f48;
  --muted:#6b7180;
  --rule:#e7e6df;
  --accent:#0b3d91;          /* deep navy */
  --accent-soft:#1d4e9b;
  --highlight:#fff3c4;        /* paper-margin highlight */
  --code-bg:#f4f3ee;
  --max:980px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Source Serif 4","Source Serif Pro",Georgia,Cambria,"Times New Roman",Times,serif;
  font-size:18px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
.sans{font-family:"Inter","Helvetica Neue",Arial,sans-serif}

a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(11,61,145,.25)}
a:hover{color:var(--accent-soft);border-bottom-color:var(--accent-soft)}
img,video{max-width:100%;display:block}

.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* ---------- Header / title block ---------- */
.titleblock{
  padding:64px 0 32px;
  text-align:center;
  border-bottom:1px solid var(--rule);
  background:var(--paper);
}
.venue{
  font-family:"Inter",sans-serif;font-size:.78rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--accent);font-weight:600;
  margin-bottom:18px;
}
.titleblock h1{
  font-family:"Source Serif 4",Georgia,serif;
  font-weight:600;font-size:clamp(1.7rem,3.4vw,2.6rem);line-height:1.2;
  margin:0 0 14px;letter-spacing:-.005em;color:var(--ink);
}
.titleblock h1 .sub{
  display:block;font-size:.68em;font-weight:500;color:var(--ink-soft);margin-top:8px;
}
.authors{font-size:1.05rem;margin:18px 0 4px;color:var(--ink)}
.authors .a{font-weight:600}
.authors sup{color:var(--muted);font-weight:400}
.affil{color:var(--muted);font-size:.95rem;margin:0 0 6px}
.contact{color:var(--muted);font-size:.88rem;font-family:"Inter",sans-serif}

.btnrow{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:26px;
  font-family:"Inter",sans-serif;
}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--ink);color:#fff;border:1px solid var(--ink);
  padding:9px 18px;border-radius:4px;font-weight:500;font-size:.92rem;
  border-bottom-color:var(--ink);
}
.btn:hover{background:#000;color:#fff;border-color:#000;border-bottom-color:#000}
.btn.outline{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn.outline:hover{background:var(--ink);color:#fff}
.btn .ico{font-size:1rem;line-height:1}

/* ---------- Sections ---------- */
section{padding:56px 0;border-bottom:1px solid var(--rule)}
section:last-of-type{border-bottom:none}
h2{
  font-family:"Source Serif 4",Georgia,serif;
  font-weight:600;font-size:1.6rem;letter-spacing:-.005em;
  margin:0 0 6px;color:var(--ink);
}
h2::before{
  content:"";display:inline-block;width:34px;height:2px;background:var(--accent);
  vertical-align:middle;margin-right:14px;transform:translateY(-5px);
}
.section-kicker{
  font-family:"Inter",sans-serif;font-size:.74rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--accent);font-weight:600;margin:0 0 6px 48px;
}
section p{margin:0 0 16px}
section p.lede{color:var(--ink-soft);font-size:1.05rem;margin-top:14px}

em.term{font-style:normal;background:var(--highlight);padding:0 3px;border-radius:2px}

/* ---------- Teaser ---------- */
.teaser{margin:0;padding:0}
.teaser img{margin:0 auto;background:#fff;border:1px solid var(--rule);border-radius:6px;max-width:760px;width:100%}
.teaser figcaption{
  font-family:"Inter",sans-serif;font-size:.9rem;color:var(--muted);
  text-align:center;margin-top:14px;max-width:720px;margin-left:auto;margin-right:auto;line-height:1.55;
}
.teaser figcaption strong{color:var(--ink-soft)}

/* ---------- Method ---------- */
.method-prose p{font-size:1.02rem}
.method-prose p strong{color:var(--ink)}
.figpair{display:grid;gap:22px;grid-template-columns:1fr 1fr;margin-top:28px;align-items:start}
.figpair figure{margin:0;background:var(--paper);border:1px solid var(--rule);border-radius:6px;padding:14px;display:flex;flex-direction:column}
.figpair figure .imgwrap{display:flex;align-items:center;justify-content:center;background:#fff;border-radius:4px;min-height:200px;max-height:280px;overflow:hidden;padding:8px}
.figpair figure .imgwrap img{max-height:260px;width:auto;max-width:100%;object-fit:contain;background:transparent}
.figpair figcaption{
  font-family:"Inter",sans-serif;font-size:.85rem;color:var(--muted);
  margin-top:12px;line-height:1.55;
}
.figpair figcaption strong{color:var(--ink-soft)}

.fig-single{margin:28px auto 0;background:var(--paper);border:1px solid var(--rule);border-radius:6px;padding:16px;max-width:720px}
.fig-single .imgwrap{display:flex;align-items:center;justify-content:center;background:#fff;border-radius:4px;max-height:340px;overflow:hidden;padding:8px}
.fig-single .imgwrap img{max-height:320px;width:auto;max-width:100%;object-fit:contain}
.fig-single figcaption{
  font-family:"Inter",sans-serif;font-size:.86rem;color:var(--muted);
  text-align:center;margin-top:12px;max-width:680px;margin-left:auto;margin-right:auto;line-height:1.55;
}

/* ---------- Results (academic prose + headline numbers + table) ---------- */
.headline{
  display:grid;gap:0;grid-template-columns:repeat(3,1fr);
  border:1px solid var(--rule);border-radius:6px;background:var(--paper);
  margin:18px 0 28px;overflow:hidden;
}
.headline .h{
  padding:22px 22px;border-right:1px solid var(--rule);
}
.headline .h:last-child{border-right:none}
.headline .v{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;
  font-size:2rem;color:var(--accent);letter-spacing:-.01em;line-height:1;
}
.headline .k{
  font-family:"Inter",sans-serif;font-size:.85rem;color:var(--ink-soft);
  margin-top:8px;line-height:1.45;
}
@media (max-width:680px){.headline{grid-template-columns:1fr}.headline .h{border-right:none;border-bottom:1px solid var(--rule)}.headline .h:last-child{border-bottom:none}}

.results-prose h3{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;font-size:1.15rem;
  margin:28px 0 6px;color:var(--ink);
}
.results-prose p{font-size:1.02rem}

/* Booktabs-style table (academic) */
.tblwrap{margin:24px auto 8px;max-width:760px;overflow-x:auto}
table.tbl{
  width:100%;border-collapse:collapse;
  font-family:"Source Serif 4",Georgia,serif;font-size:.95rem;background:transparent;
  border:none;
}
table.tbl caption{
  caption-side:bottom;color:var(--muted);font-size:.84rem;text-align:left;
  margin-top:10px;line-height:1.55;font-family:"Inter",sans-serif;
}
table.tbl th, table.tbl td{
  padding:8px 14px;text-align:left;border:none;
}
table.tbl thead th{
  border-top:1.4px solid var(--ink);
  border-bottom:0.8px solid var(--ink);
  font-family:"Inter",sans-serif;font-weight:600;color:var(--ink);
  font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;
  padding-top:10px;padding-bottom:8px;
}
table.tbl tbody tr td{padding-top:7px;padding-bottom:7px}
table.tbl tbody tr:last-child td{border-bottom:1.4px solid var(--ink)}
table.tbl td.num,table.tbl th.num{text-align:right;font-variant-numeric:tabular-nums;padding-right:24px}
table.tbl tr.best td{font-weight:600;color:var(--ink)}
table.tbl tr.best td:first-child{position:relative}
table.tbl tr.divider td{border-top:0.8px solid var(--rule);padding-top:10px}

/* ---------- Videos ---------- */
.video-block{margin-top:28px}
.video-block h3{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;font-size:1.15rem;
  margin:0 0 6px;color:var(--ink);
}
.video-block .desc{color:var(--ink-soft);font-size:1rem;margin:0 0 16px;max-width:780px}

.video-row{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.vcard{background:var(--paper);border:1px solid var(--rule);border-radius:6px;overflow:hidden}
.vcard video{width:100%;background:#000;display:block;aspect-ratio:16/9;object-fit:contain}
.vcard .vmeta{padding:12px 14px}
.vcard .vmeta h4{
  font-family:"Source Serif 4",Georgia,serif;font-weight:600;font-size:1rem;
  margin:0 0 4px;color:var(--ink);
}
.vcard .vmeta p{
  font-family:"Inter",sans-serif;font-size:.86rem;color:var(--muted);margin:0;line-height:1.5;
}
.vcard.featured{grid-column:1/-1}
.vcard.featured video{max-height:520px}

/* ---------- BibTeX ---------- */
.bib{
  background:var(--code-bg);border:1px solid var(--rule);border-radius:6px;
  padding:18px 22px;font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.86rem;line-height:1.55;color:var(--ink);
  white-space:pre-wrap;word-wrap:break-word;position:relative;
}
.copybtn{
  position:absolute;top:10px;right:10px;background:var(--paper);
  border:1px solid var(--rule);color:var(--ink);
  padding:5px 12px;border-radius:4px;font-size:.78rem;cursor:pointer;
  font-family:"Inter",sans-serif;border-bottom-color:var(--rule);
}
.copybtn:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------- Footer ---------- */
footer{
  padding:36px 0 48px;text-align:center;color:var(--muted);
  font-family:"Inter",sans-serif;font-size:.86rem;border-top:1px solid var(--rule);
}
footer a{color:var(--accent)}

@media (max-width:720px){
  .titleblock{padding:48px 0 28px}
  section{padding:44px 0}
  .figpair{grid-template-columns:1fr}
  h2{font-size:1.35rem}
  h2::before{width:24px}
  .section-kicker{margin-left:38px}
}