:root{
  --bg:#0b0d12;
  --bg2:#0f1422;

  --card:#ffffff;
  --cardTint: rgba(255,255,255,0.94);

  --text:#0f1115;
  --muted:#5c6674;

  --border:#e3e6ea;

  /* less “blue link”, more muted teal-green */
  --link:#0b6b5b;
  --linkHover:#064c3f;

  --accent:#0b6b5b;
  --accentSoft: rgba(11,107,91,0.14);

  --shadow: 0 12px 44px rgba(0,0,0,0.14);
  --shadowTight: 0 10px 26px rgba(0,0,0,0.14);

  --max:980px;
  --radius:18px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color:var(--text);
  line-height:1.6;
  font-size:17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;

  background:
    radial-gradient(900px 520px at 18% -10%, rgba(126,231,135,0.10), transparent 55%),
    radial-gradient(900px 520px at 92% 6%, rgba(138,180,255,0.10), transparent 55%),
    radial-gradient(700px 420px at 55% 40%, rgba(255,255,255,0.05), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
}

/* Links */
a{
  color:var(--link);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  text-decoration-color: rgba(11,107,91,0.35);
  transition: color 0.16s ease, text-decoration-color 0.16s ease, background 0.16s ease;
}
a:hover{
  color:var(--linkHover);
  text-decoration-color: rgba(6,76,63,0.55);
}
a:focus-visible{
  outline: 3px solid rgba(126,231,135,0.55);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Layout */
.wrap{max-width:var(--max); margin:0 auto; padding:28px 18px 74px;}
.container{max-width:var(--max); margin:0 auto; padding:0 18px;}

/* Sticky header */
header{
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.52);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
header *{color: inherit;}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:10px 0;
}

.brand{
  display:flex;
  flex-direction:column;
}
.brand-name{
  font-size: 1.45rem;
  font-weight: 720;
  letter-spacing: -0.2px;
  color: #ffffff;
}
.brand-affiliation{
  margin-top: 4px;
  font-size: 0.95rem;
  font-weight: 520;
  color: rgba(255,255,255,0.78);
  line-height: 1.35;
}

/* Header nav */
header nav{
  display:flex;
  align-items:center;
  gap:6px;
  flex-wrap:wrap;
}
header nav a{
  position:relative;
  color:#ffffff;
  font-weight: 650;
  font-size: 0.95rem;
  letter-spacing: 0.2px;
  text-decoration:none;
  padding: 7px 10px;
  border-radius: 999px;
  transition: background 0.18s ease, transform 0.18s ease;
}
header nav a:hover{
  background: rgba(255,255,255,0.08);
  transform: translateY(-1px);
}
header nav a.active{
  background: rgba(126,231,135,0.14);
  border: 1px solid rgba(126,231,135,0.18);
}

/* Hero */
.hero{
  display:grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 24px;
  align-items:start;
}
@media (max-width: 900px){
  .hero{grid-template-columns: 1fr;}
}

/* Headings */
h1{
  font-size: 2.35rem;
  font-weight: 760;
  letter-spacing: -0.7px;
  margin: 0 0 10px 0;
}
h2{
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.section{
  padding-top: 28px;
  scroll-margin-top: 86px;
}
.section h2{
  margin: 0 0 10px 0;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.68);
}
.section h3{
  margin: 0 0 10px 0;
  font-size: 18px;
  letter-spacing: -0.2px;
}

/* Cards */
.card{
  background: var(--cardTint);
  border: 1px solid rgba(227,230,234,0.92);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}
.lead{
  color: var(--muted);
  font-size: 16px;
  margin: 0;
}
.meta{
  color: var(--muted);
  font-size: 13px;
}
.hr{
  margin: 26px 0 0 0;
  border:none;
  border-top: 1px solid rgba(227,230,234,0.95);
}

/* Images */
img{
  display:block;
  border:1px solid rgba(227,230,234,0.95);
  border-radius: 14px;
}
.profile-pic{
  width: 100%;
  max-width: 360px;
  height: auto;
  display:block;
  margin: 0 auto 14px auto;
}

/* Pills */
.pills{display:flex; flex-wrap:wrap; gap:10px; margin-top:14px;}
.pill{
  display:inline-flex;
  gap:8px;
  align-items:center;
  padding:8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(15,17,21,0.10);
  background: rgba(15,17,21,0.03);
  color: rgba(15,17,21,0.72);
  font-size: 13px;
  font-weight: 650;
}

/* Buttons (this is the missing core piece) */
.btnrow{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:10px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;

  padding:8px 12px;
  border-radius: 999px;

  border: 1px solid rgba(15,17,21,0.12);
  background: rgba(15,17,21,0.04);
  color: rgba(15,17,21,0.90);

  text-decoration:none;
  font-size: 13px;
  font-weight: 680;

  box-shadow: 0 10px 20px rgba(0,0,0,0.06);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadowTight);
  background: rgba(15,17,21,0.06);
  text-decoration:none;
}

.btn:active{
  transform: translateY(0px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.10);
}

.btn:focus-visible{
  outline: 3px solid rgba(126,231,135,0.55);
  outline-offset: 2px;
}

.btn.small{
  padding:6px 10px;
  font-size: 13px;
  font-weight: 680;
}

.btn.primary{
  background: linear-gradient(180deg, rgba(11,107,91,0.96), rgba(11,107,91,0.86));
  border-color: rgba(11,107,91,0.78);
  color: #ffffff;
  box-shadow: 0 12px 22px rgba(11,107,91,0.22);
}
.btn.primary:hover{
  background: linear-gradient(180deg, rgba(11,107,91,1.0), rgba(11,107,91,0.88));
  border-color: rgba(11,107,91,0.90);
}

.btn.subtle{
  background: rgba(255,255,255,0.80);
  border-color: rgba(15,17,21,0.12);
}

.btn.social{
  background: rgba(11,107,91,0.06);
  border-color: rgba(11,107,91,0.18);
}
.btn.social:hover{
  background: rgba(11,107,91,0.10);
  border-color: rgba(11,107,91,0.26);
}

/* Abstract details styled as a button */
details.abs{
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(227,230,234,0.95);
}
details.abs > summary{
  list-style:none;
  cursor:pointer;

  display:inline-flex;
  align-items:center;
  justify-content:center;

  padding:6px 10px;
  border-radius: 999px;

  border: 1px solid rgba(15,17,21,0.12);
  background: rgba(15,17,21,0.04);
  color: rgba(15,17,21,0.88);

  font-size: 13px;
  font-weight: 680;

  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
details.abs > summary::-webkit-details-marker{display:none;}
details.abs > summary:hover{
  transform: translateY(-1px);
  background: rgba(15,17,21,0.06);
  box-shadow: 0 10px 18px rgba(0,0,0,0.08);
}
details.abs[open] > summary{
  background: var(--accentSoft);
  border-color: rgba(11,107,91,0.26);
}
details.abs > summary:focus-visible{
  outline: 3px solid rgba(126,231,135,0.55);
  outline-offset: 2px;
}

/* Grids and lists */
.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 900px){
  .grid{grid-template-columns:1fr;}
}
ul{margin:10px 0 0 18px; padding:0;}
li{margin:8px 0;}

/* Paper meta helpers */
.paper-coauthors{
  font-size: 15px;
  margin-top: 6px;
  margin-bottom: 4px;
  color: rgba(15,17,21,0.92);
}
.paper-status{
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 10px;
}

/* Definition lists */
.kv{margin:0;}
.kv dt{font-weight:800; margin-top:10px;}
.kv dd{margin:4px 0 0 0; color:var(--muted);}

.smallnote{color:var(--muted); font-size:13px; margin-top:10px;}

.footer{
  margin-top: 26px;
  color: rgba(255,255,255,0.68);
  font-size: 13px;
}

/* Motion accessibility */
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;}
  header nav a:hover,
  .btn:hover,
  details.abs > summary:hover{transform:none;}
}

/* ----------------------------
   Icon-only external links
   ---------------------------- */

.icon-links{
  display:flex;
  justify-content:center;
  gap:18px;
  margin-top:10px;
}

.iconbtn{
  width:56px;
  height:56px;
  border-radius:999px;
  background:#2f3135;
  color:#ffffff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  text-decoration:none;
  border:0;
  box-shadow: 0 12px 26px rgba(0,0,0,0.16);
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.iconbtn:hover{
  background:#24262a;
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(0,0,0,0.20);
  text-decoration:none;
}

.iconbtn:active{
  transform: translateY(0px);
  box-shadow: 0 10px 22px rgba(0,0,0,0.18);
}

.iconbtn:focus-visible{
  outline: 3px solid rgba(11,107,91,0.45);
  outline-offset: 3px;
}

.iconbtn svg{
  width:26px;
  height:26px;
  fill: currentColor;
  display:block;
}