@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --ink:#171a1c;
  --ink-soft:#565d63;
  --ink-faint:#8b9096;
  --paper:#ffffff;
  --paper-soft:#f4f5f3;
  --accent:#2c5f5a;
  --accent-soft:#e3edec;
  --line:#e1e1dc;
  --line-strong:#c9c9c2;
  --sidebar-w:230px;
  --maxw:800px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', -apple-system, sans-serif;
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
a:focus-visible, button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
img{max-width:100%;display:block;}

.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  letter-spacing:0.06em;
  color:var(--accent);
  text-transform:uppercase;
  margin:0 0 10px;
}
.eyebrow::before{content:"[ ";}
.eyebrow::after{content:" ]";}

/* ---- shell / sidebar ---- */
.shell{display:grid; grid-template-columns:var(--sidebar-w) 1fr; min-height:100vh;}
.sidebar{
  border-right:1px solid var(--line);
  background:var(--paper-soft);
  padding:30px 26px;
  position:sticky; top:0; height:100vh;
  display:flex; flex-direction:column;
}
.brand{display:flex; align-items:center; gap:10px; color:var(--ink); margin-bottom:6px;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:32px; height:32px; border-radius:6px;
  background:var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-family:'IBM Plex Mono', monospace; font-size:12px; font-weight:500;
}
.brand-name{
  font-weight:600; font-size:16px;
  line-height:1.25; margin:14px 0 28px;
}
.sidebar nav ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:2px;}
.sidebar nav a{
  color:var(--ink-soft); font-size:14px; font-weight:500;
  padding:8px 10px; margin:0 -10px; border-radius:5px;
  display:block; border-left:2px solid transparent;
}
.sidebar nav a:hover{color:var(--ink); text-decoration:none; background:var(--paper);}
.sidebar nav a.active{color:var(--accent); border-left-color:var(--accent); background:var(--accent-soft);}
.sidebar-contact{
  margin-top:auto; padding-top:20px; border-top:1px solid var(--line);
  font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--ink-faint);
  display:flex; flex-direction:column; gap:6px;
}
.sidebar-contact a{color:var(--ink-soft);}

.main{min-width:0;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px;}

/* ---- hero ---- */
.hero{padding:56px 0 44px; border-bottom:1px solid var(--line);}
.hero-grid{display:grid; grid-template-columns:1.4fr 0.9fr; gap:40px; align-items:center;}
h1{font-size:36px; font-weight:600; margin:0 0 6px; letter-spacing:-0.01em;}
.role{font-size:16px; color:var(--ink-soft); margin:0 0 18px;}
.role strong{color:var(--ink); font-weight:500;}
.bio{font-size:16px; color:var(--ink); max-width:52ch; margin:0 0 20px;}
.btnrow{display:flex; gap:12px; flex-wrap:wrap;}
.btn{
  display:inline-block; font-size:14px; font-weight:500;
  padding:11px 20px; border-radius:6px; border:1px solid var(--ink);
  color:var(--ink);
}
.btn:hover{background:var(--ink); color:#fff; text-decoration:none;}
.btn.primary{background:var(--accent); border-color:var(--accent); color:#fff;}
.btn.primary:hover{background:#234b47; border-color:#234b47;}

.photo-frame{
  border-radius:50%; overflow:hidden; width:190px; height:190px;
  border:1px solid var(--line-strong); justify-self:end;
}
.photo-frame img{
  width:100%; height:100%;
  object-fit:cover; object-position:center 25%;
  display:block;
}

/* ---- sections ---- */
section.block{padding:48px 0; border-bottom:1px solid var(--line);}
section.block:last-of-type{border-bottom:none;}
h2{font-size:22px; font-weight:600; margin:0 0 6px;}
.lede{color:var(--ink-soft); max-width:64ch; margin:0 0 28px;}

.pillars{display:flex; flex-direction:column;}
.pillar{padding:16px 0; border-top:1px solid var(--line); display:grid; grid-template-columns:150px 1fr; gap:16px;}
.pillar:first-of-type{border-top:none;}
.pillar h3{font-size:14px; font-weight:600; margin:0; text-transform:uppercase; letter-spacing:0.02em; font-family:'IBM Plex Mono', monospace;}
.pillar p{font-size:14px; color:var(--ink-soft); margin:0; line-height:1.6;}

.entry{padding:18px 0; border-top:1px solid var(--line);}
.entry:first-of-type{border-top:none;}
.entry-meta{
  font-family:'IBM Plex Mono', monospace; font-size:12px;
  color:var(--accent); margin:0 0 6px;
}
.entry h3{font-size:16px; font-weight:600; margin:0 0 6px; line-height:1.4;}
.entry p{margin:0; font-size:14px; color:var(--ink-soft); line-height:1.6;}
.entry a.doi{font-size:13px; font-family:'IBM Plex Mono', monospace;}

.cv-item{display:grid; grid-template-columns:150px 1fr; gap:16px; padding:16px 0; border-top:1px solid var(--line);}
.cv-item:first-of-type{border-top:none;}
.cv-item .when{font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--ink-faint); padding-top:2px;}
.cv-item h3{font-size:15px; font-weight:600; margin:0 0 4px;}
.cv-item .org{font-size:14px; color:var(--accent); margin:0 0 6px;}
.cv-item p, .cv-item ul{font-size:14px; color:var(--ink-soft); margin:0; line-height:1.6;}
.cv-item ul{padding-left:18px;}

.taglist{display:flex; flex-wrap:wrap; gap:8px;}
.tag{
  font-family:'IBM Plex Mono', monospace; font-size:12px;
  background:var(--paper-soft); border:1px solid var(--line);
  border-radius:5px; padding:5px 10px; color:var(--ink-soft);
}

.contact-grid{display:flex; flex-direction:column;}
.contact-card{padding:16px 0; border-top:1px solid var(--line); display:grid; grid-template-columns:150px 1fr; gap:16px; align-items:baseline;}
.contact-card:first-of-type{border-top:none;}
.contact-card .label{font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--ink-faint);}
.contact-card .value{font-size:16px; font-weight:500;}

footer{padding:36px 0; color:var(--ink-faint); font-size:13px;}
footer .wrap{display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}
footer a{color:var(--ink-soft);}

@media (max-width:820px){
  .shell{grid-template-columns:1fr;}
  .sidebar{
    position:static; height:auto; flex-direction:row; align-items:center;
    flex-wrap:wrap; border-right:none; border-bottom:1px solid var(--line);
    padding:18px 24px;
  }
  .brand-name{display:none;}
  .sidebar nav ul{flex-direction:row; flex-wrap:wrap; margin-left:16px;}
  .sidebar-contact{display:none;}
  .wrap{padding:0 24px;}
  .hero-grid{grid-template-columns:1fr;}
  .photo-frame{justify-self:start; width:150px; height:150px; order:-1;}
  .pillar, .cv-item, .contact-card{grid-template-columns:1fr; gap:4px;}
  h1{font-size:30px;}
}