:root{
  --paper: #F5F3EE;
  --paper-raised: #FBFAF7;
  --ink: #20241F;
  --ink-soft: #565F52;
  --ink-faint: #8A9182;
  --accent: #7A3E2B;
  --accent2: #35563D;
  --line: #DAD5C6;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Source Sans 3", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sidebar-w: 300px;
}

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

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--ink); color:var(--paper); padding:.6em 1em; z-index:100;
}
.skip-link:focus{ left:1em; top:1em; }

.mono{ font-family: var(--mono); }

a{ color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover, a:focus-visible{ border-bottom-color: currentColor; }
:focus-visible{ outline: 2px solid var(--accent2); outline-offset: 3px; }

.page{
  display:grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height:100vh;
}

/* Sidebar */
.sidebar{
  border-right: 1px solid var(--line);
  padding: 2.4rem 2rem;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  position: sticky;
  top:0;
  height:100vh;
}

.label{ color: var(--ink-faint); font-size: .78rem; letter-spacing:.06em; margin:0 0 .9rem; text-transform: uppercase; }

.avatar{
  width: 200px;
  height: 240px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid #000;
  display: block;
  margin: 0 auto 1.4rem;
}

.name{
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-weight: 500;
  font-size: 2.3rem;
  line-height: 1.05;
  margin: 0 0 1rem;
  letter-spacing: -.01em;
}

.tagline{ color: var(--ink-soft); font-size: .95rem; margin:0; }

.nav{ display:flex; flex-direction:column; gap: .5rem; margin: 2.6rem 0; }
.nav a{
  color: var(--ink);
  border:none;
  display:flex; align-items:baseline; gap:.6rem;
  font-size: .98rem;
  padding: .15rem 0;
}
.nav a:hover{ color: var(--accent); }
.nav .num{ color: var(--ink-faint); font-size: .78rem; }

.margin-note{
  font-size: .78rem;
  color: var(--ink-faint);
  line-height: 1.55;
  border-left: 2px solid var(--line);
  padding-left: .8rem;
  margin: 0 0 1.4rem;
}

.social{ list-style:none; padding:0; margin:0; display:flex; flex-wrap:wrap; gap: .5rem 1rem; }
.social a{ font-family: var(--mono); font-size: .82rem; color: var(--ink-soft); }
.social a:hover{ color: var(--accent); }

.nav-toggle{ display:none; }

/* Main */
main{ padding: 2.4rem 3rem 4rem; max-width: 880px; }

.hero{ padding: 1.4rem 0 3rem; border-bottom: 1px solid var(--line); margin-bottom: 3rem; }
.eyebrow{ color: var(--ink-faint); font-size: .78rem; margin: 0 0 1.1rem; }
.hero-line{
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  margin: 0 0 1.2rem;
  max-width: 18ch;
}
.hero-sub{ color: var(--ink-soft); max-width: 52ch; font-size: 1.02rem; }

.block{ padding-bottom: 3.2rem; margin-bottom: 3.2rem; border-bottom: 1px solid var(--line); scroll-margin-top: 2rem; }
.block:last-of-type{ border-bottom:none; }

.block h3{
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.5rem;
  display:flex; align-items:baseline; gap:.7rem;
  margin: 0 0 1.6rem;
}
.block h3 .num{ color: var(--accent); font-size: .85rem; }

.block-body p{ margin: 0 0 1rem; color: var(--ink); max-width: 62ch; }
.lead{ color: var(--ink-soft) !important; }

.fact-strip{
  display:flex; gap: 2.4rem; flex-wrap:wrap;
  margin-top: 1.6rem; padding-top: 1.4rem; border-top: 1px dashed var(--line);
  font-size: .85rem;
}
.fact-label{ display:block; color: var(--ink-faint); font-size:.72rem; text-transform:uppercase; letter-spacing:.05em; margin-bottom:.3rem; }

/* Research: small cards in a row, expanding panel spans full width below */
.research-block{ margin-top: 1.6rem; }
.research-row{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-bottom: 22px; }
.research-card-wrap{ position: relative; }

.research-card{
  display:block;
  width: 100%;
  height: 100%;
  text-align: left;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 1.3rem 1.2rem;
  margin: 0;
  cursor: pointer;
  font-family: inherit;
  position: relative;
  z-index: 1;
  transition: border-color .2s ease;
}
.research-card:hover h4{ color: var(--accent); }
.research-card[aria-expanded="true"]{
  border-color: var(--accent);
  border-bottom-color: transparent;
  z-index: 2;
}

/* Bridges the gap between the selected card and the panel below,
   so it reads as one continuous shape. A real element (not a
   pseudo-element on the button) so it isn't clipped by the button. */
.research-connector{
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  margin-top: -1px;
  height: calc(22px + 2px);
  background: transparent;
  border-left: 1px solid transparent;
  border-right: 1px solid transparent;
  z-index: 3;
  pointer-events: none;
}
.research-card[aria-expanded="true"] + .research-connector{
  background: var(--paper-raised);
  border-color: var(--accent);
}

.research-toggle-head{
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom: .6rem;
}
.card-tag{ color: var(--accent2); font-size: .72rem; }
.research-arrow{
  color: var(--accent);
  font-size: 1rem;
  transition: transform .25s ease;
}
.research-card[aria-expanded="true"] .research-arrow{ transform: rotate(90deg); }

.research-card h4{ font-family: var(--serif); font-weight: 500; font-size: 1.08rem; margin: 0 0 .5rem; transition: color .15s ease; }
.research-card p{ font-size: .92rem; color: var(--ink-soft); margin:0; }

.research-detail{
  max-height: 0;
  overflow: hidden;
  margin-top: 0;
  transition: max-height .35s ease;
  background: var(--paper-raised);
  border: 0 solid var(--accent);
}
.research-detail.open{
  border-width: 1px;
}
.research-detail-inner{
  padding: 1.4rem 1.5rem 1.8rem;
}
.research-detail-inner p{ font-size: .95rem; color: var(--ink); max-width: none; margin: 0 0 1rem; }
.research-detail-inner figure{
  margin: 1.4rem 0;
  max-width: 640px;
}
.research-detail-inner figure img{
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  background: var(--paper);
}
.research-detail-inner figure.oval img{
  border: none;
  background: none;
  clip-path: ellipse(50% 50% at 50% 50%);
}
.research-detail-inner figcaption{
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--ink-faint);
  margin-top: .6rem;
  /* max-width: 80ch; */
}

/* Publications */
.pub-list{ list-style:none; margin: 1.6rem 0 0; padding:0; counter-reset: none; }
.pub{
  display:grid; grid-template-columns: 3rem 1fr; gap: .4rem 1rem;
  padding: 1.1rem 0; border-top: 1px solid var(--line);
}
.pub:first-child{ border-top: 1px solid var(--line); }
.pub-index{ color: var(--accent); font-size: .92rem; }
.pub-title{ font-family: var(--serif); font-size: 1.08rem; margin: 0 0 .35rem; font-weight: 500; }
.pub-meta{ color: var(--ink-soft); font-size: .9rem; margin: 0 0 .5rem; }
.pub-links{ font-size: .78rem; display:flex; gap: .9rem; margin:0; }

/* CV */
.cv-download{ display:inline-block; font-size: .88rem; border-bottom: 1px solid currentColor; }
.timeline{ margin-top: 1.8rem; display:flex; flex-direction:column; gap: 1.8rem; }
.timeline-label{ color: var(--accent2); font-size: .78rem; text-transform:uppercase; letter-spacing:.05em; margin: 0 0 .8rem; }
.timeline-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap: .6rem; }
.timeline-list li{ display:grid; grid-template-columns: 7rem 1fr; gap: 1rem; font-size: .95rem; }
.t-year{ color: var(--ink-faint); font-size: .82rem; }

/* Contact */
.contact-email a{ font-family: var(--serif); font-size: 1.3rem; }
.social-inline{ margin-top: 1.4rem; }

.footer{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:.5rem;
  font-size: .76rem; color: var(--ink-faint); padding-top: 1rem;
}

/* Responsive */
@media (max-width: 860px){
  .page{ grid-template-columns: 1fr; }
  .sidebar{
    position: relative; height:auto; border-right:none; border-bottom: 1px solid var(--line);
    padding: 1.4rem 1.4rem;
  }
  .sidebar-bottom{ display:none; }
  .avatar{ width: 84px; height: 108px; }
  .nav{ display:none; margin: 1.2rem 0 0; }
  .nav.open{ display:flex; }
  .nav-toggle{
    display:block; position:absolute; top: 1.5rem; right: 1.4rem;
    background:none; border: 1px solid var(--line); color: var(--ink);
    padding: .4rem .8rem; font-size: .78rem; cursor:pointer;
  }
  .name{ font-size: 1.8rem; }
  main{ padding: 2rem 1.4rem 3rem; }
  .research-row{ grid-template-columns: 1fr; }
  .research-card{ padding: 1.1rem 1.2rem; }
  .pub{ grid-template-columns: 2.2rem 1fr; }
  .timeline-list li{ grid-template-columns: 5.5rem 1fr; }
}