:root{
  --paper:#fbfaf7;
  --ink:#1c1c1a;
  --ink-soft:#6e6e68;
  --line:#e1dfd6;
  --line-strong:#c9c6ba;
  --accent:#1f4e8c;
  --hover:#f3f2ed;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;
  font-size:17px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--ink);color:var(--paper);}

a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--line-strong);}
a:hover{color:var(--ink);border-color:var(--ink);}
a:focus-visible,button:focus-visible{outline:2px solid var(--ink);outline-offset:2px;}

h1,h2,h3{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-weight:600;margin:0;letter-spacing:-0.01em;line-height:1.2;}

.wrap{max-width:900px;margin:0 auto;padding:0 36px;}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:10;
  background:rgba(251,250,247,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
nav .wrap{display:flex;justify-content:space-between;align-items:center;height:58px;position:relative;}
nav .brand{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:14px;letter-spacing:0.08em;color:var(--ink-soft);text-transform:uppercase;border-bottom:none;}
nav .brand:hover{color:var(--ink);border-bottom:none;}
.brand-group{display:flex;align-items:center;gap:14px;}
.nav-updated{
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:12px;color:var(--ink-soft);
  white-space:nowrap;border-left:1px solid var(--line);padding-left:14px;
}
nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;}
nav a{border:none;font-size:14.5px;color:var(--ink-soft);font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;padding-bottom:2px;position:relative;letter-spacing:0.01em;}
nav a::after{content:"";position:absolute;left:0;right:100%;bottom:-3px;height:1px;background:var(--ink);transition:right 0.2s ease;}
nav a:hover{color:var(--ink);}
nav a:hover::after{right:0;}
nav a[aria-current="page"]{color:var(--ink);}
nav a[aria-current="page"]::after{right:0;}

.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:32px;height:32px;background:none;border:none;cursor:pointer;padding:0;
}
.nav-toggle span{display:block;width:100%;height:1.5px;background:var(--ink);border-radius:1px;transition:transform 0.2s ease, opacity 0.2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- hero ---------- */
header.hero{
  position:relative;
  padding:38px 0 30px;
  border-bottom:1px solid var(--line);
  background:var(--paper);
}
.hero-row{display:flex;gap:32px;align-items:flex-start;position:relative;z-index:1;}
.hero-about-wrap{margin-top:30px;}
.avatar{
  flex:0 0 auto;
  width:112px;height:112px;border-radius:50%;
  padding:0;
  background:none;
  border:1px solid var(--line-strong);
}
.avatar-inner{
  width:100%;height:100%;border-radius:50%;
  background:var(--paper);
  display:flex;align-items:center;justify-content:center;
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:34px;font-weight:600;
  color:var(--ink);
  overflow:hidden;
}
.avatar-inner img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:50%;
  display:block;
}
.eyebrow{
  display:inline-block;
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:15px;font-weight:500;color:var(--ink-soft);
  letter-spacing:0;text-transform:none;margin-bottom:14px;
}
h1.name{
  font-size:40px;margin-bottom:10px;letter-spacing:-0.01em;
  color:var(--ink);
}
.role-affiliation{color:var(--ink-soft);font-size:16.5px;margin:0 0 6px;}
.role-tagline{
  color:var(--ink-soft);font-size:17.5px;margin:0 0 22px;font-style:italic;
}
.contact-row{display:flex;flex-wrap:wrap;gap:20px;font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:15px;}
.contact-pending{color:var(--ink-soft);opacity:0.5;border-bottom:1px dashed var(--line-strong);cursor:default;}

/* ---------- sections ---------- */
section{padding:26px 0;border-bottom:1px solid var(--line);}
section:last-of-type{border-bottom:none;}
.section-head{
  display:flex;align-items:baseline;gap:14px;margin-bottom:14px;
  border-bottom:1px solid var(--line);padding-bottom:7px;
}
.icon-badge{display:none;}
.section-head h2{font-size:20px;font-weight:600;letter-spacing:-0.005em;}
.section-head .note{margin-left:4px;}

.bio p{color:var(--ink);font-size:17px;text-align:justify;hyphens:auto;}
.interests{margin-top:20px;font-size:14.5px;color:var(--ink-soft);}
.interests span{color:var(--ink-soft);}
.interests span+span::before{content:"  \00b7  ";color:var(--line-strong);}

/* journal reviewer list */
.journal-list{font-size:16px;color:var(--ink-soft);line-height:1.6;}
.journal-list span{color:var(--ink-soft);}
.journal-list span+span::before{content:", ";color:var(--ink-soft);}

/* publications */
.pub-legend{
  font-size:13px;font-weight:400;color:var(--ink-soft);letter-spacing:0;
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;
}
.pub{
  padding:14px 0;
  transition:background 0.15s ease;
}
.pub:hover{background:var(--hover);}
.pub-title{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:15.5px;font-weight:600;line-height:1.3;margin-bottom:2px;color:var(--ink);}
.pub-meta{font-size:14px;color:var(--ink-soft);line-height:1.35;}
.pub-meta strong{text-decoration:underline;text-underline-offset:2px;color:var(--ink);}
.pub-meta em{font-style:italic;font-weight:600;color:var(--accent);}
.in-press{font-style:italic;font-weight:500;color:var(--ink-soft);}
.pub-num{
  display:inline-block;font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:15.5px;font-weight:500;
  color:var(--ink-soft);margin-right:9px;vertical-align:middle;
}
.pub-tag{
  display:inline-block;font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:10px;font-weight:500;
  border:1px solid var(--line-strong);border-radius:3px;padding:1px 6px;margin-right:8px;vertical-align:middle;
  color:var(--ink-soft);
}
.tag-journal,.tag-conference,.tag-preprint{color:var(--ink-soft);}

/* education */
.edu-grid{display:flex;flex-direction:column;}
.edu-item{padding:7px 0;border-bottom:1px solid var(--line);transition:background 0.15s ease;}
.edu-item:last-child{border-bottom:none;}
.edu-item:hover{background:var(--hover);}
.edu-degree{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:17px;font-weight:600;margin-bottom:3px;color:var(--ink);}
.edu-meta{font-size:15px;color:var(--ink-soft);}
.edu-dates{
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:14px;font-weight:400;
  color:var(--ink-soft);margin-left:8px;
}

/* awards */
.award-grid{display:flex;flex-direction:column;}
.award-item{
  display:flex;gap:16px;align-items:baseline;padding:7px 0;border-bottom:1px solid var(--line);
  transition:background 0.15s ease;
}
.award-item:last-child{border-bottom:none;}
.award-item:hover{background:var(--hover);}
.award-year{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:15px;color:var(--ink-soft);flex:0 0 auto;width:44px;}
.award-name{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-weight:600;font-size:17px;color:var(--ink);}
.award-org{font-size:15px;color:var(--ink-soft);}

/* research grants & projects */
.grant-grid{display:flex;flex-direction:column;}
.grant-item{padding:9px 0;border-bottom:1px solid var(--line);transition:background 0.15s ease;}
.grant-item:last-child{border-bottom:none;}
.grant-item:hover{background:var(--hover);}
.grant-title{
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;
  font-size:17px;font-weight:600;margin-bottom:3px;color:var(--ink);
}
.grant-role{
  display:inline-block;font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;
  font-size:12px;font-weight:600;
  border:1px solid var(--line-strong);border-radius:3px;padding:1px 7px;margin-right:9px;vertical-align:middle;
  color:var(--ink-soft);text-transform:uppercase;letter-spacing:0.03em;
}
.grant-dates{
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:14px;font-weight:400;
  color:var(--ink-soft);margin-left:8px;
}
.grant-meta{font-size:15px;color:var(--ink-soft);}

/* research: current focus (collapsible) */
.focus-intro{
  font-size:17px;color:var(--ink-soft);margin:0 0 4px;
}
details.focus-item{
  border:1px solid var(--line-strong);
  border-radius:8px;
  margin-bottom:12px;
  background:var(--paper);
  transition:box-shadow 0.15s ease, border-color 0.15s ease;
  overflow:hidden;
}
details.focus-item:last-child{margin-bottom:0;}
details.focus-item:hover{
  border-color:var(--ink-soft);
  box-shadow:0 2px 10px rgba(28,28,26,0.06);
}
details.focus-item[open]{
  border-color:var(--ink-soft);
}
details.focus-item summary{
  cursor:pointer;
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:17px;font-weight:600;
  color:var(--ink);
  padding:14px 16px;
  transition:background 0.15s ease;
}
details.focus-item summary::-webkit-details-marker{display:none;}
details.focus-item summary::marker{content:"";}
details.focus-item summary:hover{background:var(--hover);}
details.focus-item summary::after{
  content:"\25B8";
  flex:0 0 auto;
  font-size:15px;
  color:var(--ink-soft);
  width:16px;text-align:center;
  transition:transform 0.2s ease;
}
details.focus-item[open] summary::after{transform:rotate(90deg);}
details.focus-item .focus-body{
  margin:0;
  padding:0 16px 16px;
  font-size:17px;color:var(--ink-soft);
  text-align:justify;hyphens:auto;
}

/* misc */
.misc-item{
  padding:7px 0;border-bottom:1px solid var(--line);font-size:17px;color:var(--ink-soft);
}
.misc-item:last-child{border-bottom:none;}

/* talks / conferences timeline */
.timeline{position:relative;padding-left:22px;}
.timeline::before{content:"";position:absolute;left:4px;top:4px;bottom:4px;width:1px;background:var(--line-strong);}
.talk{position:relative;padding-bottom:12px;}
.talk:last-child{padding-bottom:0;}
.talk::before{
  content:"";position:absolute;left:-24px;top:4px;width:9px;height:9px;
  border-radius:50%;background:var(--paper);border:1.5px solid var(--ink-soft);
  box-sizing:border-box;
}
.talk-date{
  display:inline;font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:15px;font-weight:400;
  color:var(--ink-soft);
}
.talk-title{font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-weight:600;margin:2px 0;font-size:17px;color:var(--ink);}
.talk-place{font-size:15px;color:var(--ink-soft);}
.talk-tag{
  display:inline-block;font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:12px;font-weight:600;
  border:1px solid var(--line-strong);border-radius:3px;padding:1px 7px;margin-right:8px;vertical-align:middle;
  color:var(--ink-soft);text-transform:uppercase;letter-spacing:0.03em;
}

/* footer */
footer{padding:28px 0 40px;color:var(--ink-soft);font-size:15px;}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

.note{
  font-family:Arial, Helvetica, 'Helvetica Neue', -apple-system, 'Segoe UI', sans-serif;font-size:13.5px;font-weight:500;color:var(--ink-soft);
  border-bottom:1px dashed var(--line-strong);
}

/* ---------- subpage banner (for non-home pages) ---------- */
.page-banner{
  padding:52px 0 36px;
  border-bottom:1px solid var(--line);
  background:var(--paper);
}
.page-banner .eyebrow{margin-bottom:12px;}
.page-banner h1{font-size:34px;letter-spacing:-0.01em;color:var(--ink);}
.page-banner p{color:var(--ink-soft);font-size:16.5px;margin-top:8px;}

@media (max-width:680px){
  .nav-toggle{display:flex;}
  .nav-updated{display:none;}
  nav ul{
    display:none;position:absolute;left:0;right:0;top:100%;
    flex-direction:column;gap:0;
    background:var(--paper);border-bottom:1px solid var(--line);
    padding:8px 28px 16px;
  }
  nav ul.open{display:flex;}
  nav ul li{width:100%;}
  nav a{display:block;padding:10px 0;}
  nav a::after{display:none;}
}

@media (max-width:600px){
  .hero-row{flex-direction:column;gap:18px;}
  h1.name{font-size:30px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;}
}