/* Shared design system for the research and courses pages.
   Same tokens, fonts and colours as index.html; no video hero. */
:root{
  --bg:#0b0b0c;
  --bg-soft:#101013;
  --ink:#ececeb;
  --ink-dim:#b3b3af;
  --rule:#26262a;
  --accent:#9ec6bd;
  --accent-dim:#6f938c;
  --measure:68ch;
  --pad:clamp(1.25rem,5vw,5rem);
  --gap:clamp(1.5rem,3.5vw,3.25rem);
  --nav-h:56px;
  --font:"Space Grotesk","Helvetica Neue",Arial,system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 1rem);}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-weight:300;
  font-size:clamp(1rem,.94rem + .3vw,1.0625rem);
  line-height:1.65;
  letter-spacing:.005em;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:500;line-height:1.16;letter-spacing:-.015em;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--accent);text-decoration:none;}
a:hover{color:var(--ink);}
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
}
img{max-width:100%;height:auto;}
svg{max-width:100%;height:auto;}

.skip{
  position:absolute;left:-9999px;top:0;z-index:60;
  background:var(--bg);color:var(--ink);
  padding:.75rem 1rem;border:1px solid var(--accent);
}
.skip:focus{left:1rem;top:1rem;}

.wrap{
  max-width:1200px;
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
}
.measure{max-width:var(--measure);}

/* ---------- fixed top navigation ---------- */
.topnav{
  position:fixed;top:0;left:0;right:0;z-index:40;
  height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(11,11,12,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.topnav .wrap{
  width:100%;
  display:flex;align-items:center;
  gap:clamp(.7rem,1.8vw,1.6rem);
  overflow-x:auto;
  -ms-overflow-style:none;
  scrollbar-width:none;
}
.topnav .wrap::-webkit-scrollbar{display:none;}
.nav-mark{
  color:var(--ink);
  font-size:.9375rem;
  font-weight:500;
  white-space:nowrap;
  margin-right:auto;
}
.topnav a.nav-link{
  color:var(--ink-dim);
  font-size:.875rem;
  letter-spacing:.02em;
  white-space:nowrap;
  padding:.35rem 0;
}
.topnav a.nav-link:hover{color:var(--accent);}
@media (max-width:1100px){.nav-mark{display:none;}}

/* ---------- plain page header ---------- */
.page-head{
  border-bottom:1px solid var(--rule);
  padding-top:calc(var(--nav-h) + clamp(3rem,8vw,6rem));
  padding-bottom:clamp(2.5rem,6vw,4.5rem);
  background:linear-gradient(180deg,#0e0e11 0%,var(--bg) 100%);
}
.kicker{
  color:var(--ink-dim);
  font-size:.8125rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-bottom:clamp(.9rem,2vw,1.4rem);
}
h1{
  font-size:clamp(2rem,1.3rem + 2.8vw,3.5rem);
  color:#fff;
  max-width:20ch;
  text-wrap:balance;
}
.lede{
  margin-top:clamp(.9rem,2vw,1.35rem);
  color:var(--ink-dim);
  font-size:clamp(1.05rem,.98rem + .35vw,1.25rem);
  max-width:56ch;
}

/* ---------- body ---------- */
.band{padding-block:clamp(2.5rem,6vw,4.5rem);}
main p{max-width:var(--measure);}
main p + p{margin-top:1rem;}
.sec{border-top:1px solid var(--rule);padding-top:clamp(1.5rem,3vw,2.25rem);margin-top:clamp(2.5rem,6vw,4rem);}
.sec:first-of-type{border-top:0;margin-top:0;padding-top:0;}
h2{font-size:clamp(1.3rem,1.1rem + .9vw,1.85rem);margin-bottom:1rem;max-width:34ch;}
h3{font-size:clamp(1.05rem,.98rem + .45vw,1.3rem);margin:2rem 0 .85rem;}
main ul.bullets{list-style:disc;padding-left:1.25rem;max-width:var(--measure);}
main ul.bullets li{margin:.45rem 0;color:var(--ink-dim);}
main ul.bullets li strong{color:var(--ink);font-weight:500;}
main ol.bullets{list-style:decimal;padding-left:1.25rem;max-width:var(--measure);}
strong{font-weight:600;color:var(--ink);}
em{font-style:italic;}
code{font-family:var(--mono);font-size:.9em;background:#16161a;padding:.1em .35em;border:1px solid var(--rule);}

/* ---------- paper meta ---------- */
.byline{color:var(--ink);font-size:.9375rem;margin-top:.25rem;}
.byline .me{font-weight:600;}
.venue{color:var(--ink-dim);font-size:.9375rem;margin-top:.3rem;max-width:none;}
.venue .role{color:var(--accent);}
.paper-links{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;margin-top:.75rem;font-size:.9375rem;}

/* ---------- abstract, findings, callouts ---------- */
.abstract{
  border-left:2px solid var(--accent-dim);
  padding:.9rem 0 .9rem 1.25rem;
  margin-top:1.5rem;
  color:var(--ink-dim);
}
.abstract .lab{
  display:block;
  color:var(--accent);
  font-size:.75rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-bottom:.5rem;
}
.findings{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));
  gap:1.25rem clamp(1.25rem,2.5vw,2.5rem);
  margin-top:1.75rem;
}
.finding{border-top:1px solid var(--rule);padding-top:.75rem;}
.finding b{display:block;color:var(--ink);font-size:1.35rem;font-weight:500;letter-spacing:-.01em;}
.finding span{display:block;color:var(--ink-dim);font-size:.875rem;margin-top:.3rem;}
.note,.warn{
  border:1px solid var(--rule);
  border-left:2px solid var(--accent-dim);
  padding:1rem 1.25rem;
  margin-top:1.75rem;
  background:var(--bg-soft);
}
.warn{border-left-color:#c8a06a;}
.note .t,.warn .t{
  display:block;color:var(--ink);font-size:.9375rem;font-weight:500;margin-bottom:.5rem;
}
.note p,.warn p{color:var(--ink-dim);max-width:none;}

/* ---------- tables ---------- */
.tablewrap{overflow-x:auto;margin-top:1.25rem;}
table{border-collapse:collapse;width:100%;min-width:32rem;font-size:.9375rem;}
caption{text-align:left;color:var(--ink-dim);font-size:.875rem;padding-bottom:.5rem;}
th,td{text-align:left;padding:.6rem .9rem .6rem 0;border-bottom:1px solid var(--rule);}
th{color:var(--ink);font-weight:500;border-bottom-color:var(--accent-dim);}
td{color:var(--ink-dim);font-variant-numeric:tabular-nums;}
td strong{color:var(--ink);}

/* ---------- figures ---------- */
figure{margin:1.75rem 0 0;}
figure img{border:1px solid var(--rule);background:#141417;display:block;}
figcaption{color:var(--ink-dim);font-size:.875rem;margin-top:.6rem;max-width:var(--measure);}
.figrow{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1.5rem clamp(1.25rem,2.5vw,2rem);}
.figrow figure{margin-top:0;}
.figquad{display:grid;grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));gap:1.25rem;}
.figquad figure{margin-top:0;}
.workflow{margin-top:1.75rem;border:1px solid var(--rule);background:#101014;padding:1rem;}
.wf-cap{color:var(--ink-dim);font-size:.875rem;margin-top:.6rem;}

/* ---------- bibtex ---------- */
details.bib{margin-top:1.5rem;border-top:1px solid var(--rule);padding-top:.9rem;}
details.bib summary{cursor:pointer;color:var(--accent);font-size:.9375rem;}
details.bib pre{
  font-family:var(--mono);font-size:.8125rem;line-height:1.5;
  color:var(--ink-dim);background:var(--bg-soft);
  border:1px solid var(--rule);padding:1rem;overflow-x:auto;margin-top:.85rem;
}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--rule);margin-top:clamp(3rem,7vw,5rem);}
.foot-grid{
  padding-block:clamp(2.5rem,6vw,4rem);
  display:flex;flex-wrap:wrap;
  gap:1rem 2.5rem;
  align-items:baseline;
  justify-content:space-between;
}
.foot-links{display:flex;flex-wrap:wrap;gap:.75rem 1.75rem;}
.foot-note{color:var(--ink-dim);font-size:.9375rem;}