:root {
  color-scheme: light;
  --text: #20242a;
  --muted: #5e6670;
  --border: #d9dee5;
  --surface: #ffffff;
  --subtle: #f4f6f8;
  --accent: #1f5f8f;
  --accent-dark: #16486d;
  --chip: #edf4f8;
  --max: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.58;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
  font-weight: 600;
}

.nav-links a {
  color: var(--muted);
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--accent-dark);
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  padding: 54px 0 34px;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 44px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
}

h1 {
  margin: 0;
  font-size: 46px;
  letter-spacing: 0;
}

.subtitle {
  margin: 10px 0 22px;
  color: var(--muted);
  font-size: 19px;
}

.bio {
  max-width: 760px;
  margin: 0 0 20px;
  font-size: 16px;
}

.link-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 650;
}

.stats-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 18px;
  box-shadow: 0 10px 26px rgba(31, 95, 143, 0.08);
}

.stats-card h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.stat {
  background: var(--subtle);
  border-radius: 6px;
  padding: 10px;
}

.stat strong {
  display: block;
  font-size: 22px;
  line-height: 1.1;
}

.stat span {
  color: var(--muted);
  font-size: 12px;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.keyword-list li {
  background: var(--chip);
  color: var(--accent-dark);
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 13px;
  font-weight: 650;
}

.section {
  padding: 42px 0;
  border-bottom: 1px solid var(--border);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.section h2 {
  margin: 0;
  color: var(--accent-dark);
  font-size: 27px;
}

.section-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.area-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.area {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: var(--surface);
}

.area img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: var(--subtle);
}

.paper-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: var(--subtle);
}

.area-figure {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--subtle);
}

.area h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.area p {
  margin: 0 0 12px;
  color: var(--muted);
}

.compact-list {
  margin: 0;
  padding-left: 18px;
}

.compact-list li + li {
  margin-top: 5px;
}

.paper-list {
  display: grid;
  gap: 22px;
}

.paper {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.paper-thumb {
  aspect-ratio: 720 / 430;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--subtle);
}

.paper h3 {
  margin: 0 0 5px;
  font-size: 19px;
}

.authors,
.venue,
.description {
  margin: 0 0 7px;
}

.authors {
  color: var(--muted);
  font-size: 14px;
}

.venue {
  font-size: 14px;
  font-weight: 700;
}

.description {
  color: var(--muted);
  font-size: 15px;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 7px;
  font-size: 14px;
  font-weight: 700;
}

.award {
  display: inline-block;
  margin: 1px 0 8px;
  padding: 3px 8px;
  border-radius: 999px;
  background: #fff8df;
  color: #795300;
  font-size: 13px;
  font-weight: 750;
}

.year-block {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
}

.year-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.year {
  color: var(--accent-dark);
  font-size: 24px;
  font-weight: 800;
}

.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.publication-list li + li {
  margin-top: 16px;
}

.pub-title {
  font-weight: 750;
}

.pub-meta {
  color: var(--muted);
}

.pub-links {
  display: inline-flex;
  gap: 9px;
  margin-left: 4px;
  font-weight: 700;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.info-block h3 {
  margin: 0 0 8px;
}

.info-block p {
  margin: 0;
  color: var(--muted);
}

.education-panel {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.education-photo {
  margin: 0;
  max-width: 180px;
}

.education-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.education-photo figcaption {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
}

.education-copy h3,
.timeline-item h3,
.service-item h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.education-copy p {
  margin: 0 0 11px;
}

.thesis-title {
  padding: 12px 14px;
  border-left: 4px solid var(--accent);
  background: var(--subtle);
  border-radius: 0 6px 6px 0;
  font-weight: 700;
}

.timeline,
.service-list {
  display: grid;
  gap: 16px;
}

.timeline-item,
.service-item {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 20px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.service-item {
  grid-template-columns: 1fr;
}

.timeline-date {
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 800;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.page-title {
  padding: 44px 0 26px;
  border-bottom: 1px solid var(--border);
  background: var(--subtle);
}

.page-title h1 {
  font-size: 38px;
}

.page-title p {
  max-width: 800px;
  margin: 12px 0 0;
  color: var(--muted);
}

.site-footer {
  padding: 28px 0 46px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .hero-grid,
  .area-grid,
  .two-col,
  .education-panel {
    grid-template-columns: 1fr;
  }

  .education-photo {
    max-width: 180px;
  }

  .stats-card {
    max-width: 420px;
  }

  .paper,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .paper-thumb {
    max-width: 460px;
  }

  h1 {
    font-size: 38px;
  }
}

.area {
  display: flex;
  flex-direction: column;
}

.area > .area-figure {
  width: 100%;
  flex: none;
}

@media (max-width: 560px) {
  .wrap,
  .nav {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    padding-top: 34px;
  }

  h1 {
    font-size: 34px;
  }

  .section-header {
    display: block;
  }

  .section-note {
    margin-top: 6px;
  }

  .year-block {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}