:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-alt: #eef3fb;
  --text: #152033;
  --muted: #556277;
  --soft: #7a8598;
  --line: #d9e1ee;
  --line-strong: #c4d2e7;
  --accent: #0b57a4;
  --accent-strong: #083d74;
  --accent-soft: rgba(11, 87, 164, 0.1);
  --shadow: 0 18px 45px rgba(18, 35, 63, 0.08);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --content-max: 1180px;
  --home-content-max: 1340px;
  --reading-max: 760px;
  --home-reading-max: 980px;
  --home-sidebar-width: 268px;
  --transition: 180ms ease;
}

html {
  scroll-behavior: smooth;
}

body {
  padding-top: 70px;
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: linear-gradient(180deg, #f8faff 0%, #f4f7fb 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at top left, rgba(66, 153, 225, 0.14), transparent 36%),
    radial-gradient(circle at top right, rgba(11, 87, 164, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.96));
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.18em;
  transition: color var(--transition), opacity var(--transition), border-color var(--transition);
}

a:hover,
a:focus {
  color: var(--accent-strong);
  text-decoration: underline;
}

.content-column p a,
.content-column li a,
.archive-summary a,
.hero-summary a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

p,
ul,
ol,
dl {
  margin: 0;
}

img {
  max-width: 100%;
  height: auto;
}

hr {
  height: 1px;
  border: 0;
  background: var(--line);
  background-image: none !important;
}

.navbar {
  padding: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(11, 26, 48, 0.92) !important;
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 42px rgba(10, 17, 33, 0.16);
}

.navbar .container {
  max-width: var(--content-max);
  padding: 0 24px;
}

.navbar-brand {
  display: inline-block;
  padding: 0.85rem 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.1;
  color: #fff !important;
}

.brand-subtitle {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.navbar-nav {
  gap: 0.3rem;
}

.navbar-dark .navbar-nav .nav-link {
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus,
.navbar-dark .navbar-nav .nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.11);
  text-decoration: none;
}

.site-shell {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.95rem 24px 3rem;
}

body.page-home .site-shell {
  max-width: var(--home-content-max);
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--reading-max)) minmax(260px, 296px);
  gap: 1.2rem;
  align-items: start;
}

.page-layout--single {
  grid-template-columns: minmax(0, 1fr);
}

.content-column {
  min-width: 0;
}

.sidebar-column {
  position: sticky;
  top: 92px;
}

.hero {
  position: relative;
  padding: 1.7rem 2rem 1.5rem;
  margin-bottom: 0.75rem;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(11, 87, 164, 0.1), rgba(255, 255, 255, 0.9) 52%),
    var(--surface);
  border: 1px solid rgba(11, 87, 164, 0.12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -4rem -5rem auto;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(11, 87, 164, 0.16), transparent 70%);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.8rem;
  margin-bottom: 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.archive-header h1 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(2.5rem, 4vw, 4rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: #0d1a2c;
}

.hero-subtitle,
.archive-subtitle {
  margin-top: 0.52rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-strong);
}

.hero-summary,
.archive-summary {
  max-width: 44rem;
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.profile-meta,
.sidebar-facts {
  margin-top: 0.95rem;
  padding-left: 1rem;
  color: var(--muted);
}

.profile-meta li,
.sidebar-facts li {
  margin-top: 0.28rem;
}

.hero-summary--secondary {
  margin-top: 0.55rem;
}

.content-section,
.archive-header,
.content-panel,
.profile-card,
.archive-sections > section,
.tool-groups > section {
  background: var(--surface);
  border: 1px solid rgba(21, 32, 51, 0.08);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.content-section,
.archive-sections > section,
.tool-groups > section {
  padding: 1.05rem 1.3rem;
  margin-top: 0.72rem;
}

.archive-header {
  padding: 1.35rem 1.45rem 1.05rem;
  margin-bottom: 0.65rem;
}

.archive-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.15rem;
}

.archive-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--line);
}

.section-heading h2,
.content-section h2,
.archive-sections h2,
.tool-groups h2 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.55rem, 2vw, 2rem);
  line-height: 1.1;
  color: #0f223a;
}

.section-heading p,
.content-section > p:first-of-type,
.archive-sections > section > p:first-of-type,
.tool-groups > section > p:first-of-type {
  color: var(--muted);
}

.subsection-title,
.content-section h3,
.archive-sections h3,
.tool-groups h3 {
  margin: 0 0 0.42rem;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.18rem;
  line-height: 1.18;
  color: #163457;
}

.content-section h3:not(:first-child),
.archive-sections h3:not(:first-child),
.tool-groups h3:not(:first-child) {
  margin-top: 0.85rem;
}

.content-section h4,
.archive-sections h4,
.tool-groups h4 {
  margin: 1rem 0 0.65rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.lead-copy {
  font-size: 1rem;
  color: var(--muted);
}

.news-list,
.award-list,
.compact-list,
.service-list {
  padding-left: 1.05rem;
}

.research-list {
  padding-left: 1.15rem;
}

.research-list li,
.news-list li,
.award-list li,
.compact-list li,
.service-list li {
  margin-top: 0.28rem;
}

.research-list li {
  margin-top: 0.55rem;
}

.news-list li {
  padding-bottom: 0.28rem;
  border-bottom: 1px solid rgba(85, 98, 119, 0.12);
}

.news-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.publication-list,
.archive-sections ol,
.tool-groups ol {
  padding-left: 1.35rem;
}

.publication-list > li,
.archive-sections ol > li,
.tool-groups ol > li {
  margin-top: 0.62rem;
  padding-top: 0.55rem;
  border-top: 1px solid rgba(85, 98, 119, 0.12);
}

.publication-list > li:first-child,
.archive-sections ol > li:first-child,
.tool-groups ol > li:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.archive-sections ol > li > strong,
.tool-groups ol > li > strong,
.publication-list > li > strong {
  color: #10233b;
}

.archive-sections p,
.tool-groups p,
.publication-list p,
.content-section p + p {
  margin-top: 0.24rem;
}

#selected-publications .publication-list > li > p {
  font-size: 0.8rem;
  line-height: 1.24;
  color: var(--muted);
}

#selected-publications .publication-list > li > strong {
  line-height: 1.22;
}

.refs-link,
.refs-acceptance,
.meta-link-row,
.tool-link-row,
.small-note {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.8rem;
  align-items: center;
  margin-top: 0.4rem;
  color: var(--soft);
  font-size: 0.93rem;
}

.refs-link,
.refs-acceptance {
  display: inline-flex;
  margin-right: 0.55rem;
}

.refs-link a,
.refs-acceptance a,
.meta-link-row a,
.tool-link-row a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
}

.refs-link a:hover,
.refs-acceptance a:hover,
.meta-link-row a:hover,
.tool-link-row a:hover {
  border-color: rgba(11, 87, 164, 0.22);
  color: var(--accent-strong);
}

.placeholder-link,
.pending-link {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.6rem;
  border: 1px dashed #b5c2d5;
  border-radius: 999px;
  background: #f7f9fc;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.content-stack {
  display: grid;
  gap: 0.75rem;
}

.subsection-block {
  padding-top: 0.45rem;
  border-top: 1px solid rgba(85, 98, 119, 0.12);
}

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

.nested-awards,
.nested-note-list {
  list-style: none;
  padding-left: 0;
  margin-top: 0.18rem;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.22;
}

.nested-awards li,
.nested-note-list li {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 0.36rem;
  margin-top: 0.04rem;
}

.nested-awards a,
.nested-note-list a {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.36rem;
  padding: 0.14rem 0;
}

.nested-awards i,
.nested-note-list i {
  flex: 0 0 1.05em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.05em;
  margin-top: 0.08rem;
  text-align: center;
}

.nested-awards .job-result,
.nested-note-list .job-result {
  color: var(--muted);
}

.nested-awards .job-result span,
.nested-note-list .job-result span {
  display: inline-block;
}

.archive-note {
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface-alt);
  color: var(--muted);
}

.profile-card {
  padding: 0.9rem 0.95rem 0.85rem;
}

.profile-card img {
  width: 100%;
  border-radius: 18px;
  box-shadow: 0 12px 22px rgba(13, 26, 44, 0.12);
}

.profile-card h2 {
  margin: 0.65rem 0 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.42rem;
  color: #0f223a;
}

.profile-role {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.profile-email {
  margin-top: 0.55rem;
  font-weight: 600;
  color: var(--accent-strong);
  font-size: 0.9rem;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.38rem;
  margin-top: 0.68rem;
}

.profile-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid rgba(21, 32, 51, 0.08);
  border-radius: 999px;
  background: rgba(238, 243, 251, 0.92);
  color: var(--text);
  text-decoration: none;
}

.profile-link:hover,
.profile-link:focus {
  border-color: rgba(11, 87, 164, 0.18);
  text-decoration: none;
}

.profile-link img {
  width: 20px;
  height: 20px;
  border-radius: 0;
  box-shadow: none;
}

.profile-link-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(11, 87, 164, 0.16), rgba(11, 87, 164, 0.08));
  color: var(--accent-strong);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

body.page-home .hero-summary {
  max-width: 56rem;
}

body.page-home .profile-card {
  padding: 0.82rem 0.9rem 0.76rem;
}

body.page-home .profile-card h2 {
  margin-top: 0.55rem;
}

body.page-home .profile-role {
  margin-top: 0.18rem;
  font-size: 0.84rem;
}

body.page-home .profile-email {
  margin-top: 0.38rem;
  font-size: 0.86rem;
}

body.page-home .sidebar-facts {
  margin-top: 0.62rem;
  padding-left: 0.9rem;
  font-size: 0.88rem;
  line-height: 1.36;
}

body.page-home .sidebar-facts li {
  margin-top: 0.16rem;
}

body.page-home .profile-links {
  flex-wrap: nowrap;
  gap: 0.32rem;
  margin-top: 0.45rem;
}

.footer {
  margin-top: 1rem;
  padding: 0.9rem 1.15rem 0;
  border-top: 1px solid rgba(21, 32, 51, 0.1);
  color: var(--soft);
  font-size: 0.9rem;
}

.footer p {
  margin: 0;
}

.tool-groups .group-title,
.archive-sections .group-title {
  margin-bottom: 0.7rem;
}

.tool-groups .tool-link-row,
.archive-sections .meta-link-row {
  margin-top: 0.8rem;
}

.page-publications .archive-sections,
.page-llm .archive-sections,
.page-tools .archive-sections {
  display: grid;
  gap: 0.22rem;
}

.page-publications .archive-sections > h3,
.page-llm .archive-sections > h3,
.page-tools .archive-sections > h3 {
  margin: 0.15rem 0 0;
  padding-left: 0;
}

.page-publications .archive-sections > h2,
.page-llm .archive-sections > h2,
.page-tools .archive-sections > h2 {
  margin: 0.12rem 0 0.08rem;
  padding-left: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.18rem;
  line-height: 1.18;
  color: #163457;
}

.page-publications .archive-sections > ol,
.page-llm .archive-sections > ol,
.page-tools .archive-sections > ol {
  margin: 0 0 0.12rem;
}

.page-tools .archive-sections ol > li {
  margin-top: 0.5rem;
  padding-top: 0.45rem;
}

.page-publications .archive-sections ol > li > p,
.page-llm .archive-sections ol > li > p {
  font-size: 0.8rem;
  line-height: 1.22;
  color: var(--muted);
}

.page-publications .archive-sections ol > li > strong,
.page-llm .archive-sections ol > li > strong {
  line-height: 1.2;
}

.page-tools .archive-sections > ol,
.page-publications .archive-sections > ol,
.page-llm .archive-sections > ol {
  padding-left: 1rem;
}

.page-publications .archive-header,
.page-llm .archive-header,
.page-publications .archive-sections,
.page-llm .archive-sections {
  max-width: 60rem;
}

.page-publications .archive-summary,
.page-llm .archive-summary {
  max-width: none;
}

.page-publications .archive-sections,
.page-llm .archive-sections {
  padding-left: 1.45rem;
  padding-right: 1.45rem;
}

.page-publications .archive-sections > h2,
.page-publications .archive-sections > h3,
.page-llm .archive-sections > h2,
.page-llm .archive-sections > h3 {
  margin-left: 0;
}

.page-publications .archive-sections ol > li,
.page-llm .archive-sections ol > li {
  padding-left: 0.08rem;
}

.page-publications .archive-sections .refs-link,
.page-publications .archive-sections .refs-acceptance,
.page-llm .archive-sections .refs-link,
.page-llm .archive-sections .refs-acceptance {
  display: inline-flex;
  align-items: center;
  margin-top: 0.18rem;
}

.page-tools .archive-sections iframe {
  margin-top: 0.3rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

iframe {
  max-width: 100%;
}

@media (min-width: 992px) {
  body.page-home .page-layout {
    grid-template-columns: minmax(0, 1fr) minmax(252px, var(--home-sidebar-width));
    gap: 1rem;
  }

  body.page-home .content-column {
    max-width: var(--home-reading-max);
  }

  body.page-home .hero {
    padding: 1.55rem 1.9rem 1.35rem;
  }
}

@media (max-width: 991.98px) {
  body {
    padding-top: 68px;
  }

  .navbar .container {
    padding: 0 18px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar-column {
    position: static;
  }

  body.page-home .profile-links {
    flex-wrap: wrap;
  }
}

@media (max-width: 767.98px) {
  .site-shell {
    padding: 0.72rem 16px 2.35rem;
  }

  .hero,
  .archive-header,
  .content-section,
  .archive-sections > section,
  .tool-groups > section,
  .profile-card {
    padding: 1rem 0.95rem;
    border-radius: 22px;
  }

  .hero h1,
  .archive-header h1 {
    font-size: clamp(2rem, 10vw, 2.8rem);
  }

  .navbar-brand {
    font-size: 1.08rem;
  }

  .navbar-dark .navbar-nav .nav-link {
    border-radius: 12px;
  }

  .profile-links {
    gap: 0.4rem;
  }
}