:root{
  --bg:#ffffff;
  --fg:#1f2328;
  --muted:#5b6570;
  --accent:#0b5cad;
  --accent-soft:#e8f0fa;
  --border:#e6e8eb;
  --card:#fbfcfd;
  --maxw:960px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0f1216; --fg:#e6e8eb; --muted:#9aa4af; --accent:#5aa2e6;
    --accent-soft:#16222f; --border:#242a31; --card:#141a20;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.65; font-size:17px;
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px}

/* Nav */
header.nav{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-inner{display:flex; align-items:center; justify-content:space-between; height:60px}
.brand{font-weight:700; letter-spacing:.2px; color:var(--fg)}
.brand:hover{text-decoration:none}
nav ul{display:flex; gap:22px; list-style:none; margin:0; padding:0}
nav a{color:var(--muted); font-size:15px; font-weight:500}
nav a:hover{color:var(--accent); text-decoration:none}
nav a.active{color:var(--accent)}
nav a.active::after{content:""; display:block; height:2px; background:var(--accent); border-radius:2px; margin-top:3px}
.menu-toggle{display:none; background:none; border:0; color:var(--fg); font-size:22px; cursor:pointer}
@media (max-width:640px){
  nav ul{display:none; position:absolute; top:60px; left:0; right:0; flex-direction:column;
    gap:0; background:var(--bg); border-bottom:1px solid var(--border)}
  nav ul.open{display:flex}
  nav li{padding:0 24px}
  nav a{display:block; padding:12px 0; border-bottom:1px solid var(--border)}
  nav a.active::after{display:none}
  .menu-toggle{display:block}
}

/* Hero (home) */
.hero{display:grid; grid-template-columns:220px 1fr; gap:40px; align-items:start; padding:56px 0 40px}
@media (max-width:640px){ .hero{grid-template-columns:1fr; text-align:center; padding:36px 0 24px; gap:24px} }
.photo{
  width:220px; height:220px; border-radius:14px; object-fit:cover;
  border:1px solid var(--border); background:var(--accent-soft);
  display:flex; align-items:center; justify-content:center; color:var(--muted); font-size:14px;
}
@media (max-width:640px){ .photo{margin:0 auto} }
.hero h1{margin:0 0 6px; font-size:34px; letter-spacing:-.5px}
.title{color:var(--fg); font-weight:600; margin:0}
.affil{color:var(--muted); margin:2px 0 0}
.socials{display:flex; gap:14px; margin-top:18px; flex-wrap:wrap}
@media (max-width:640px){ .socials{justify-content:center} }
.socials a{
  display:inline-flex; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:9px; border:1px solid var(--border);
  color:var(--muted); background:var(--card);
}
.socials a:hover{color:var(--accent); border-color:var(--accent); text-decoration:none}
.socials svg{width:20px; height:20px}

/* Page content */
.page{padding:44px 0 20px}
.page h1{font-size:30px; margin:0 0 8px; letter-spacing:-.4px}
.page .lead{color:var(--muted); margin:0 0 26px; font-size:18px}
section{padding:8px 0}
section h2{font-size:22px; margin:26px 0 16px; display:flex; align-items:center; gap:10px}
section h2::before{content:""; width:6px; height:22px; border-radius:3px; background:var(--accent)}
p{margin:0 0 14px}
.tags{display:flex; flex-wrap:wrap; gap:8px; margin-top:8px}
.tag{font-size:13px; background:var(--accent-soft); color:var(--accent);
  padding:4px 11px; border-radius:999px; border:1px solid var(--border)}

/* Publications grouped by year */
.year-group{margin-top:6px}
.year-label{
  font-size:22px; font-weight:700; color:var(--accent);
  margin:30px 0 4px; padding-bottom:8px; border-bottom:2px solid var(--border);
  display:flex; align-items:baseline; gap:10px;
}
.year-label .count{font-size:13px; font-weight:500; color:var(--muted)}
ul.pub-year{list-style:none; margin:0; padding:0}
ul.pub-year li{padding:13px 0; border-bottom:1px solid var(--border)}
ul.pub-year li:last-child{border-bottom:0}
.pub-title{font-weight:600; color:var(--fg)}
.pub-meta sup, .pub-title sup{color:var(--accent); font-weight:700; padding-left:1px}
.pub-meta{color:var(--muted); font-size:15px}
.pub-venue{font-style:italic}

/* Cards */
.cards{display:grid; grid-template-columns:1fr 1fr; gap:16px}
@media (max-width:640px){ .cards{grid-template-columns:1fr} }
.card{border:1px solid var(--border); border-radius:12px; padding:18px 20px; background:var(--card)}
.card h3{margin:0 0 6px; font-size:18px}
.card p{font-size:15px; color:var(--muted); margin:0 0 10px}
.card .links a{font-size:14px; margin-right:14px}

/* Contact */
.contact-grid{display:grid; grid-template-columns:auto 1fr; gap:8px 18px; font-size:16px}
.contact-grid dt{color:var(--muted)}
.contact-grid dd{margin:0}

footer{padding:30px 0 50px; color:var(--muted); font-size:14px; text-align:center; border-top:1px solid var(--border); margin-top:30px}