:root {
  --blue: #1f65a7;
  --blue-dark: #17436f;
  --blue-soft: #eaf3fb;
  --text: #17202a;
  --muted: #5f6b7a;
  --line: #e7edf3;
  --background: #ffffff;
  --soft: #f8fafc;
  --max-width: 1050px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--blue);
  color: #fff;
  padding: 10px 14px;
  z-index: 99;
}
.skip-link:focus { left: 10px; top: 10px; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.97);
  position: sticky;
  top: 0;
  z-index: 20;
}
.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.brand {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.02em;
}
.brand:hover { color: var(--blue); text-decoration: none; }
.nav-links {
  display: flex;
  gap: 22px;
  align-items: center;
}
.nav-links a {
  color: var(--muted);
  font-weight: 600;
  font-size: .95rem;
}
.nav-links a.active,
.nav-links a:hover {
  color: var(--blue);
  text-decoration: none;
}
.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 8px 13px;
  font-weight: 700;
  color: var(--text);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 72px;
}
.home-layout {
  display: grid;
  grid-template-columns: 265px minmax(0,1fr);
  gap: 56px;
  align-items: start;
}
.sidebar {
  text-align: center;
  position: sticky;
  top: 94px;
}
.profile-photo {
  width: 210px;
  height: 210px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 22px;
  border: 1px solid var(--line);
}
.name {
  margin: 0;
  font-size: 1.85rem;
  line-height: 1.15;
  letter-spacing: -.04em;
}
.position {
  margin: 10px 0 0;
  color: var(--muted);
  font-weight: 600;
}
.affiliation { margin: 4px 0 18px; color: var(--muted); }
.icon-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 18px 0 22px;
}
.icon-row a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  font-weight: 800;
  background: #fff;
}
.icon-row a:hover { background: var(--blue-soft); text-decoration: none; }
.button-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  border: 1px solid var(--blue);
  color: var(--blue);
  padding: 8px 13px;
  font-weight: 700;
  line-height: 1.2;
}
.button.primary { background: var(--blue); color: #fff; }
.button:hover { text-decoration: none; background: var(--blue-soft); }
.button.primary:hover { background: var(--blue-dark); }

.kicker {
  color: var(--blue);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .77rem;
  margin: 0 0 10px;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  line-height: 1.05;
  letter-spacing: -.06em;
  margin: 0 0 20px;
}
.lead {
  font-size: 1.12rem;
  color: #24303d;
}
.section { margin-top: 54px; }
.section:first-child { margin-top: 0; }
.section-title {
  font-size: 1.6rem;
  line-height: 1.25;
  letter-spacing: -.03em;
  margin: 0 0 16px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
}
.subsection-title {
  color: var(--blue-dark);
  font-size: 1.15rem;
  margin: 30px 0 12px;
  letter-spacing: -.02em;
}
.muted { color: var(--muted); }

.interest-list,
.clean-list {
  padding-left: 1.2rem;
}
.interest-list li,
.clean-list li { margin: .35rem 0; }

.paper-list {
  display: grid;
  gap: 18px;
}
.paper {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.paper:last-child { border-bottom: 0; }
.paper h3 {
  margin: 0 0 5px;
  font-size: 1.06rem;
  line-height: 1.35;
  letter-spacing: -.015em;
}
.paper .authors,
.paper .venue,
.paper .status { margin: 2px 0; }
.paper .venue { color: var(--blue-dark); font-weight: 650; }
.paper .status {
  display: inline-block;
  color: var(--muted);
  font-size: .94rem;
}
.paper .links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.paper .links a {
  border: 1px solid var(--line);
  background: var(--soft);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: .9rem;
  font-weight: 700;
}
.paper .links a:hover { background: var(--blue-soft); text-decoration: none; }

.page-title {
  max-width: 760px;
  margin-bottom: 42px;
}
.page-title h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.055em;
  margin: 0 0 12px;
}
.page-title p { color: var(--muted); font-size: 1.1rem; margin: 0; }

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 18px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  background: #fff;
}
.card h3 { margin-top: 0; margin-bottom: 8px; }
.card p:last-child { margin-bottom: 0; }
.timeline {
  display: grid;
  gap: 14px;
}
.timeline-item {
  display: grid;
  grid-template-columns: 155px minmax(0,1fr);
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.timeline-item:last-child { border-bottom: 0; }
.timeline-date { color: var(--blue-dark); font-weight: 800; }
.timeline-item p { margin: 0; }

.resource {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.resource:first-of-type { padding-top: 0; }
.resource h2 { margin-top: 0; }
.resource-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 13px;
}
.resource-actions a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 700;
  background: var(--soft);
}
.resource-actions a:hover { background: var(--blue-soft); text-decoration: none; }

.quote-list { display: grid; gap: 18px; }
blockquote {
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 3px solid var(--blue);
  color: #273442;
}
blockquote cite {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-style: normal;
  font-weight: 700;
}

.cv-section {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.cv-section:first-of-type { padding-top: 0; }
.cv-section h2 { margin-top: 0; }
.compact-list { margin: 0; padding-left: 1.2rem; }
.compact-list li { margin: .4rem 0; }

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 28px 24px 46px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-weight: 700;
}
[hidden] { display: none !important; }

@media (max-width: 850px) {
  .home-layout,
  .two-column,
  .card-grid,
  .timeline-item { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .site-footer { flex-direction: column; }
}
@media (max-width: 700px) {
  .navbar { align-items: flex-start; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    left: 24px;
    right: 24px;
    top: 62px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
  }
  .nav-links.open { display: flex; }
  main { padding-top: 34px; }
}