:root{
  --ink:#16181b;
  --muted:#63676e;
  --paper:#faf9f6;
  --line:#e2dfd8;
  --accent:#138643;
  --mono: 'JetBrains Mono', monospace;
  --display: 'Space Grotesk', sans-serif;
  --body: 'IBM Plex Sans', sans-serif;
}

*{box-sizing:border-box;}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--ink); text-decoration-color:var(--accent); text-underline-offset:3px;}
a:hover{color:var(--accent);}

sup{font-size:.6em;}

/* ---------- HERO ---------- */
.hero{
  position:relative;
  padding:6rem 1.5rem 4rem;
  max-width:880px;
  margin:0 auto;
}

.viewport-frame{position:absolute; inset:1.25rem; pointer-events:none;}
.corner{position:absolute; width:22px; height:22px; border:2px solid var(--accent); opacity:.55;}
.corner.tl{top:0; left:0; border-right:none; border-bottom:none;}
.corner.tr{top:0; right:0; border-left:none; border-bottom:none;}
.corner.bl{bottom:0; left:0; border-right:none; border-top:none;}
.corner.br{bottom:0; right:0; border-left:none; border-top:none;}

.hero-inner{position:relative; z-index:1;}

h1{
  font-family:var(--display);
  font-weight:600;
  font-size:clamp(1.9rem, 4vw, 2.9rem);
  line-height:1.15;
  margin:0 0 1.25rem;
  letter-spacing:-.01em;
}
.accent-text{color:var(--accent);}

.subtitle{
  font-size:1.05rem;
  color:var(--muted);
  max-width:56ch;
  margin:0 0 2rem;
}

.authors{margin:0 0 .25rem; font-size:.95rem;}
.authors sup{margin-left:1px;}
.authors sup a{
  color:var(--accent);
  text-decoration:none;
  font-weight:600;
}
.authors sup a:hover{text-decoration:underline;}
.affiliations{margin:0 0 2rem; font-size:.85rem; color:var(--muted); font-family:var(--mono);}
.affiliations sup{margin-right:2px;}

.award-badge{
  display:flex;
  align-items:center;
  gap:.5rem;
  margin:0 0 2rem;
  font-size:.9rem;
  color:var(--ink);
}
.award-badge i{color:var(--accent);}
.award-badge a{border-bottom:1px solid var(--accent);}

.cta-row{display:flex; flex-wrap:wrap; gap:.75rem;}
.btn{
  font-family:var(--mono);
  font-size:.8rem;
  letter-spacing:.02em;
  padding:.6rem 1.1rem;
  border:1px solid var(--ink);
  border-radius:2px;
  text-decoration:none;
  color:var(--ink);
}
.btn:hover{background:var(--ink); color:var(--paper);}
.btn-primary{background:var(--accent); border-color:var(--accent); color:var(--paper);}
.btn-primary:hover{background:var(--ink); border-color:var(--ink);}

/* ---------- SECTIONS ---------- */
main{max-width:880px; margin:0 auto; padding:0 1.5rem;}

.rule{border:none; border-top:1px solid var(--line); margin:0;}

.section{padding:3rem 0;}

.eyebrow{
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--accent);
  margin:0 0 1rem;
  display:flex; align-items:center; gap:.4rem;
}

.reticle{font-size:1em;}
.reticle.small{font-size:.9em; color:var(--accent); flex:none; margin-top:.15em;}

h2{
  font-family:var(--display);
  font-size:1.4rem;
  margin:0 0 1.25rem;
}

.abstract-text{max-width:70ch; color:var(--ink);}

/* paper card */
.paper-card{
  display:grid;
  grid-template-columns:96px 1fr;
  gap:1.5rem;
  border:1px solid var(--line);
  padding:1.5rem;
  border-radius:4px;
  margin-top:1.5rem;
  width:100%;
  background:#fff;
}
.paper-thumb{
  background:
    linear-gradient(135deg, var(--line) 25%, transparent 25%) -6px 0,
    linear-gradient(225deg, var(--line) 25%, transparent 25%) -6px 0;
  background-size:12px 12px;
  border-radius:3px;
  min-height:96px;
}
.paper-body h3{font-family:var(--display); font-size:1.05rem; margin:0 0 .5rem;}
.paper-authors{margin:0 0 .25rem; font-size:.9rem; color:var(--muted);}
.paper-venue{font-family:var(--mono); font-size:.75rem; color:var(--accent); margin:0 0 .75rem;}
.paper-desc{margin:0 0 1rem; font-size:.92rem;}
.link-row{display:flex; gap:.75rem;}
.link-chip{
  font-family:var(--mono);
  font-size:.8rem;
  border:1px solid var(--ink);
  padding:.3rem .7rem;
  border-radius:2px;
  text-decoration:none;
  color:var(--ink);
}
button.link-chip{background:none; cursor:pointer;}
.link-chip:hover{background:var(--ink); color:var(--paper);}
.link-chip[aria-expanded="true"]{background:var(--ink); color:var(--paper);}

/* cite modal */
.modal-backdrop{
  position:fixed;
  inset:0;
  background:rgba(22,24,27,.55);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:1.5rem;
  z-index:100;
}
.modal-backdrop[hidden]{display:none;}
.modal-box{
  position:relative;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:6px;
  max-width:440px;
  width:100%;
  padding:2rem 1.75rem 1.75rem;
  box-shadow:0 12px 32px rgba(0,0,0,.18);
}
.modal-box h3{
  font-family:var(--display);
  font-size:1.1rem;
  margin:0 0 .75rem;
}
.modal-box p{
  margin:0;
  font-size:.92rem;
  color:var(--muted);
}
.modal-close{
  position:absolute;
  top:.6rem;
  right:.75rem;
  background:none;
  border:none;
  font-size:1.4rem;
  line-height:1;
  color:var(--muted);
  cursor:pointer;
  padding:.25rem;
}
.modal-close:hover{color:var(--ink);}

/* asset list */
.asset-list{list-style:none; margin:0; padding:0; display:grid; gap:1.5rem;}
.asset-list li{display:flex; gap:.75rem; align-items:flex-start;}
.asset-list strong{display:block; margin-bottom:.25rem;}
.download{
  display:inline-block;
  margin-top:.5rem;
  font-family:var(--mono);
  font-size:.8rem;
  border-bottom:1px solid var(--accent);
}

/* bibtex */
.bibtex{
  background:#111214;
  color:#e7e5df;
  font-family:var(--mono);
  font-size:.8rem;
  line-height:1.6;
  padding:1.25rem 1.5rem;
  border-radius:4px;
  overflow-x:auto;
}

/* ---------- FOOTER ---------- */
.footer{
  max-width:880px;
  margin:0 auto;
  padding:2rem 1.5rem 4rem;
  font-size:.8rem;
  color:var(--muted);
  font-family:var(--mono);
}

@media (max-width:600px){
  .paper-card{grid-template-columns:1fr;}
  .paper-thumb{display:none;}
}