:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --line: #e5e7eb;
  /* primary theme color: #1565c0 */
  --accent: #1565c0;
  --accent-soft: rgba(21, 101, 192, 0.12);
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
  --avatar-size: 48px;
  --hero-photo-width: 560px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(248, 249, 251, 0.9);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.2;
}

.subtitle {
  margin: 2px 0 0 0;
  color: var(--muted);
  font-size: 14px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.avatar-link {
  display: block;
  text-decoration: none;
  line-height: 0;
}

.avatar-link:hover {
  opacity: 0.9;
}

.avatar-img {
  width: var(--avatar-size);
  height: var(--avatar-size);
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-soft);
  box-shadow: var(--shadow);
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-weight: 600;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 8px;
}

.nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.hero {
  padding: 64px 0 28px;
}

.hero-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 2fr 1fr;
  align-items: stretch;
}

@media (max-width: 720px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

.hero-grid > div:first-child {
  display: flex;
  flex-direction: column;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--accent);
  font-size: 12px;
  margin-bottom: 10px;
}

h2 {
  font-size: clamp(28px, 5vw, 36px);
  line-height: 1.2;
  margin: 0 0 12px;
}

.lead {
  font-size: 17px;
  color: var(--muted);
  margin: 0 0 18px;
  text-align: justify;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid var(--line);
  color: var(--text);
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button.ghost {
  background: #fff;
}

.button:hover {
  box-shadow: var(--shadow);
  text-decoration: none;
}

.meta {
  color: var(--muted);
  font-size: 14px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 6px 0 10px;
}

.links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-weight: 600;
}

.links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.icon-svg {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.icon-pill {
  width: 26px;
  height: 26px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.card img {
  width: 100%;
  border-radius: 12px;
  display: block;
}

.hero-grid .card {
  max-width: 300px;
  margin: 0 auto;
}

.hero-headshot {
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid var(--accent-soft);
  box-shadow: var(--shadow);
}

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

.section-separator {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line), transparent);
  margin: 32px 0;
}

.section {
  padding: 48px 0;
}

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

.news-item {
  padding: 4px 0;
  line-height: 1.6;
}

.news-item::before {
  content: '-';
  color: var(--muted);
  font-weight: 400;
  margin-right: 8px;
}

.news-date {
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  margin-right: 8px;
}

.news-content {
  color: var(--text);
  font-size: 14px;
}

.section.alt {
  background: #eef2ff;
}

.section-header h3 {
  margin: 0 0 6px;
  font-size: 22px;
}

.section-header p {
  margin: 0 0 16px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tag {
  padding: 6px 10px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-weight: 600;
  font-size: 13px;
}

.list {
  list-style: none;
  padding: 0;
  margin: 0 0 40px 0;
  display: grid;
  gap: 12px;
}

.list:last-child {
  margin-bottom: 0;
}

#teaching .list {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 720px) {
  #teaching .list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  #teaching .list {
    grid-template-columns: 1fr;
  }
}

.list li {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}

#teaching .list li {
  padding: 10px 12px;
}

#teaching .list-title {
  font-size: 14px;
  line-height: 1.3;
}

#teaching .meta {
  font-size: 12px;
}

.list-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.publication-links {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.link-box {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.link-box:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.teaching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.teaching-card {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}

.teaching-card .list-title {
  font-weight: 700;
  margin-bottom: 4px;
  font-size: 14px;
  line-height: 1.3;
}

.teaching-card .meta {
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.contact {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0 0 12px;
  display: grid;
  gap: 6px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 16px 0 32px;
}

.site-footer p.small {
  margin-top: 4px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.timeline {
  position: relative;
  padding: 20px 0;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 135px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #d1d5db;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-time {
  width: 110px;
  text-align: right;
  color: var(--muted);
  font-size: 14px;
  padding-top: 4px;
  flex-shrink: 0;
}

.timeline-content {
  flex: 1;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  position: relative;
  padding-left: 16px;
}

.timeline-node {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #9ca3af;
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px #d1d5db;
  flex-shrink: 0;
  margin-top: 4px;
  position: absolute;
  left: -1px;
  z-index: 1;
}

.timeline-text {
  flex: 1;
  padding-bottom: 8px;
}

.timeline-text strong {
  display: block;
  color: var(--text);
  font-size: 16px;
  margin-bottom: 4px;
  font-weight: 600;
}

.timeline-text p {
  margin: 4px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.timeline-text .tags {
  opacity: 0.6;
}

.timeline-text .tag {
  background: transparent;
  color: var(--muted);
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 3px 6px;
  font-size: 11px;
}

.timeline-advisor {
  font-size: 13px;
  font-style: italic;
  color: var(--muted);
}

@media (max-width: 720px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
  }
}