:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7fb;
  --color-text: #191b23;
  --color-text-muted: #5c6170;
  --color-border: #e4e6ee;
  --color-primary: #354049;
  --color-primary-light: #4d5c67;
  --color-accent: #3f8a7d;
  --shadow-card: 0 1px 2px rgba(24, 24, 40, 0.04), 0 4px 12px rgba(24, 24, 40, 0.06);
  --shadow-card-hover: 0 4px 8px rgba(24, 24, 40, 0.06), 0 12px 24px rgba(24, 24, 40, 0.1);
  --max-width: 1080px;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #12131a;
    --color-bg-alt: #191b24;
    --color-text: #e9eaf0;
    --color-text-muted: #a3a7b7;
    --color-border: #2a2d3a;
    --color-primary: #9fb0bd;
    --color-primary-light: #b7c4ce;
    --color-accent: #57bfae;
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.2), 0 4px 12px rgba(0, 0, 0, 0.24);
    --shadow-card-hover: 0 4px 8px rgba(0, 0, 0, 0.24), 0 12px 24px rgba(0, 0, 0, 0.32);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  height: 36px;
  width: auto;
  display: block;
}

.site-nav {
  display: flex;
  gap: 28px;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  display: block;
}

/* Hero */
.hero {
  padding: 88px 0 72px;
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
  border-bottom: 1px solid var(--color-border);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 0 12px;
}

.hero h1 {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: clamp(2rem, 4vw, 2.9rem);
  margin: 0 0 18px;
  color: var(--color-primary);
}

.hero-logo-icon {
  height: 1.1em;
  width: auto;
  flex-shrink: 0;
}

.hero-tagline {
  max-width: 640px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
}

.keyword-tags {
  margin-top: 44px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.keyword-tags strong {
  color: var(--color-text);
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover { background: var(--color-primary-light); transform: translateY(-1px); }

.btn-secondary {
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* Sections */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--color-border);
}

.section-alt { background: var(--color-bg-alt); }

.section h2 {
  font-size: 1.8rem;
  color: var(--color-primary);
  margin: 0 0 32px;
}

.group-title {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 36px 0 16px;
}

.group-title:first-of-type { margin-top: 0; }

.group-title--dark { color: var(--color-text); margin-top: 40px !important; }

.card-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 20px 0 10px;
}

/* People */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.person-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.person-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.people-grid--featured {
  grid-template-columns: 1fr;
}

.person-card--featured {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 28px;
}

.person-card__media {
  flex-shrink: 0;
}

.person-card--featured .avatar {
  width: 96px;
  height: 96px;
  margin-bottom: 0;
}

.person-card--featured .person-card__content {
  min-width: 0;
}

.mini-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.mini-list li {
  margin-bottom: 4px;
}

.mini-list--link {
  margin-top: 10px;
}

.mini-list--link a {
  color: var(--color-accent);
}

.bio-small {
  margin: 20px 0 0;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.affiliation-row {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 18px;
}

.affiliation-group {
  padding-left: 24px;
  border-left: 1px solid var(--color-border);
}

.affiliation-group:first-child {
  padding-left: 0;
  border-left: none;
}

.affiliation-label {
  margin: 0 0 8px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.affiliation-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 0;
}

.logo-chip {
  display: inline-flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 10px;
}

.affiliation-logos img {
  height: 22px;
  width: auto;
  display: block;
}

.logo-chip--tall {
  padding: 3px 10px;
}

.logo-chip--tall img {
  height: 34px;
}

@media (max-width: 560px) {
  .person-card--featured {
    flex-direction: column;
  }
}

.avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-border) url("../assets/images/default-avatar.svg") center / cover no-repeat;
  margin-bottom: 14px;
}

img.avatar {
  opacity: 1;
  object-fit: cover;
  background: var(--color-border);
}

.person-card h4 { margin: 0 0 4px; }

.person-card__link {
  display: block;
  color: var(--color-text) !important;
  text-decoration: none !important;
}

.person-card__link:hover h4 {
  color: var(--color-accent);
  text-decoration: underline;
}

.role {
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.role a {
  color: inherit;
  text-decoration: none;
}

.role a:hover {
  text-decoration: underline;
}

.social-links {
  margin: 8px 0 0;
  display: flex;
  gap: 14px;
}

.social-links a {
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 600;
}

.bio {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0 0 10px;
}

.alumni-list {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--color-text-muted);
}

.alumni-list li { padding: 8px 0; border-bottom: 1px solid var(--color-border); }

.alumni-list--compact { font-size: 0.85rem; }
.alumni-list--compact li { padding: 5px 0; }

.alumni-list li.has-photo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.alumni-list li.has-photo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.funding-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.funding-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.funding-icon {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-accent);
  opacity: 0.5;
}

.funding-icon--active {
  fill: currentColor;
  stroke: none;
  opacity: 1;
}

.funding-list a {
  color: inherit;
  text-decoration: underline;
}

.funding-list a:hover {
  color: var(--color-accent);
}

/* Research */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.research-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.research-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.research-card h3 {
  margin: 0 0 10px;
  color: var(--color-primary);
  font-size: 1.15rem;
}

.research-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.research-funding {
  margin: 14px 0 0 !important;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem !important;
}

.research-funding strong {
  color: var(--color-text);
}

.research-funding a {
  color: inherit;
}

.research-contributions {
  margin: 8px 0 0 !important;
  font-size: 0.8rem !important;
  color: var(--color-text-muted);
}

.research-contributions strong {
  color: var(--color-text);
}

.research-contributions a {
  color: var(--color-accent);
}

.tile-badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

/* Media */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-border);
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-caption {
  margin: 10px 0 0;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
}

.media-link {
  margin: 28px 0 0;
  text-align: center;
}

.media-link a {
  color: var(--color-primary);
  font-weight: 600;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.photo-card {
  display: block;
  color: var(--color-text) !important;
  text-decoration: none !important;
}

.photo-card:hover .photo-caption {
  color: var(--color-accent);
  text-decoration: underline;
}

.photo-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
}

.photo-caption {
  margin: 8px 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Publications */
.pub-layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.pub-year-nav {
  position: sticky;
  top: 84px;
  flex-shrink: 0;
  width: 130px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
  margin-left: calc(-1 * max(0px, (100vw - var(--max-width)) / 2));
  margin-right: max(0px, (100vw - var(--max-width)) / 2);
}

.pub-year-nav a {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-decoration: none;
  text-align: right;
}

.pub-year-nav a:hover {
  color: var(--color-primary);
}

.pub-year-nav a.is-active {
  color: var(--color-primary);
  border-right: 2px solid var(--color-primary);
  padding-right: 10px;
  margin-right: -12px;
}

.pub-content {
  flex: 1;
  min-width: 0;
}

@media (max-width: 720px) {
  .pub-layout {
    flex-direction: column;
    gap: 8px;
  }

  .pub-year-nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    width: auto;
    gap: 16px;
  }

  .pub-year-nav a {
    text-align: left;
  }

  .pub-year-nav a.is-active {
    border-right: none;
    padding-right: 0;
    margin-right: 0;
    text-decoration: underline;
  }
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
}

.pub-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.pub-title { font-weight: 600; }

.pub-authors, .pub-venue {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* News */
.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.scroll-list {
  overflow-y: auto;
}

.scroll-list--news {
  max-height: 350px;
}

.scroll-list--alumni {
  max-height: 360px;
  padding-right: 8px;
}

.news-list li {
  display: flex;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.news-date {
  flex-shrink: 0;
  width: 90px;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.news-thumb {
  flex-shrink: 0;
  width: 84px;
  height: 60px;
  object-fit: cover;
  border-radius: 6px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.contact-grid a { color: var(--color-primary); }

/* Footer */
.site-footer {
  padding: 28px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    display: none;
    padding: 8px 0;
  }

  .site-nav.open { display: flex; }

  .site-nav a {
    padding: 12px 24px;
    border-bottom: 1px solid var(--color-border);
  }

  .hero { padding: 56px 0 48px; }
  .section { padding: 48px 0; }
}