:root{
  --bg:#0d1117;
  --surface:#161b22;
  --surface-2:#1c232c;
  --line:#2a313c;
  --text:#e6edf3;
  --muted:#8b949e;
  --accent:#9b8cfa;
  --accent-ink:#1b1c33;
  --maxw:980px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter',-apple-system,Segoe UI,Helvetica,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
}
img{max-width:100%;display:block;}
a{color:var(--accent);}

/* Header / nav */
header{
  display:flex;justify-content:space-between;align-items:center;
  padding:22px 6%;border-bottom:1px solid var(--line);
  position:sticky;top:0;background:var(--bg);z-index:10;
}
.logo{font-family:'JetBrains Mono',monospace;font-size:1rem;color:var(--accent);text-decoration:none;}
nav{display:flex;align-items:center;}
nav a{
  margin-left:28px;color:var(--text);text-decoration:none;font-size:0.9rem;
}
nav a:hover, nav a.active{color:var(--accent);}
.nav-toggle{display:none;}

/* Hero */
.hero{max-width:var(--maxw);margin:0 auto;padding:90px 6% 50px;}
.hero .eyebrow{font-family:'JetBrains Mono',monospace;color:var(--accent);font-size:0.85rem;margin-bottom:22px;}
.hero h1{font-weight:600;font-size:2.6rem;line-height:1.2;margin-bottom:22px;letter-spacing:-0.01em;}
.hero h1 span{color:var(--accent);}
.hero p{font-size:1.05rem;color:var(--muted);max-width:640px;}
.hero .links{margin-top:34px;}

/* Page header (non-home pages) */
.page-head{max-width:var(--maxw);margin:0 auto;padding:70px 6% 30px;}
.page-head .eyebrow{font-family:'JetBrains Mono',monospace;color:var(--accent);font-size:0.85rem;margin-bottom:14px;}
.page-head h1{font-weight:600;font-size:2.1rem;margin-bottom:14px;}
.page-head p{color:var(--muted);max-width:640px;}

/* Buttons */
.btn{
  display:inline-block;margin-right:14px;margin-bottom:10px;padding:12px 26px;
  border-radius:6px;text-decoration:none;font-size:0.95rem;font-weight:500;
}
.btn.solid{background:var(--accent);color:var(--accent-ink);}
.btn.outline{border:1px solid var(--line);color:var(--text);}
.btn.solid:hover{opacity:0.9;}
.btn.outline:hover{border-color:var(--accent);color:var(--accent);}

/* Sections */
section{max-width:var(--maxw);margin:0 auto;padding:60px 6%;border-top:1px solid var(--line);}
section.first{border-top:none;}
section h2{font-weight:600;font-size:1.3rem;margin-bottom:24px;}
section h2 .num{font-family:'JetBrains Mono',monospace;color:var(--accent);font-size:0.9rem;margin-right:10px;}

/* Grids / cards */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.card{border:1px solid var(--line);border-radius:8px;padding:24px;background:var(--surface);}
.card .tag{font-family:'JetBrains Mono',monospace;font-size:0.75rem;color:var(--accent);margin-bottom:10px;display:block;}
.card h3{font-weight:500;font-size:1.05rem;margin-bottom:10px;}
.card p{color:var(--muted);font-size:0.92rem;}
.card ul{margin:10px 0 0 0;padding-left:1.1rem;color:var(--muted);font-size:0.92rem;}
.card li{margin-bottom:6px;}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.stat{border:1px solid var(--line);border-radius:8px;padding:20px;background:var(--surface);text-align:center;}
.stat .num{font-family:'JetBrains Mono',monospace;font-weight:500;font-size:1.7rem;color:var(--accent);}
.stat .label{font-size:0.8rem;color:var(--muted);margin-top:6px;}

/* Timeline (experience) */
.timeline{border-left:1px solid var(--line);padding-left:28px;}
.timeline .role{margin-bottom:36px;position:relative;}
.timeline .role::before{
  content:"";position:absolute;left:-33px;top:6px;width:9px;height:9px;border-radius:50%;
  background:var(--accent);
}
.timeline .role .when{font-family:'JetBrains Mono',monospace;font-size:0.78rem;color:var(--accent);margin-bottom:4px;}
.timeline .role h3{font-weight:500;font-size:1.05rem;margin-bottom:2px;}
.timeline .role .org{color:var(--muted);font-size:0.9rem;margin-bottom:10px;}
.timeline .role ul{padding-left:1.1rem;color:var(--muted);font-size:0.92rem;}
.timeline .role li{margin-bottom:6px;}

/* Skills */
.skill-group{margin-bottom:18px;}
.skill-group h4{font-size:0.85rem;color:var(--muted);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:10px;font-weight:500;}
.pills{display:flex;flex-wrap:wrap;gap:8px;}
.pill{
  font-family:'JetBrains Mono',monospace;font-size:0.78rem;color:var(--accent);
  border:1px solid var(--line);border-radius:20px;padding:6px 14px;background:var(--surface);
}

/* Publications table */
table.pubs{width:100%;border-collapse:collapse;font-size:0.92rem;}
table.pubs th{
  text-align:left;color:var(--muted);font-weight:500;font-size:0.8rem;text-transform:uppercase;
  letter-spacing:0.05em;padding:10px 12px;border-bottom:1px solid var(--line);
}
table.pubs td{padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top;}
table.pubs td.year{font-family:'JetBrains Mono',monospace;color:var(--accent);white-space:nowrap;}
table.pubs td.venue{color:var(--muted);}
table.pubs tr:hover td{background:var(--surface);}

.archive-list{font-size:0.92rem;color:var(--muted);}
.archive-list li{margin-bottom:10px;}
.archive-list a{color:var(--text);}
.archive-list .meta{color:var(--muted);font-size:0.85rem;}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.contact-card{border:1px solid var(--line);border-radius:8px;padding:24px;background:var(--surface);text-decoration:none;color:var(--text);display:flex;align-items:center;gap:14px;}
.contact-card:hover{border-color:var(--accent);}
.contact-card .icon{font-family:'JetBrains Mono',monospace;color:var(--accent);font-size:1.2rem;}
.contact-card .label{font-size:0.8rem;color:var(--muted);}
.contact-card .value{font-size:0.98rem;}

/* Footer */
footer{text-align:center;padding:40px 6%;color:var(--muted);font-size:0.85rem;font-family:'JetBrains Mono',monospace;border-top:1px solid var(--line);}
footer a{color:var(--muted);margin:0 8px;}
footer a:hover{color:var(--accent);}

/* Responsive */
@media (max-width: 720px){
  .grid, .stats, .contact-grid{grid-template-columns:1fr;}
  .hero h1, .page-head h1{font-size:1.9rem;}
  nav a{margin-left:16px;font-size:0.85rem;}
}