:root {
  --ink: #172033;
  --muted: #5f6b7a;
  --accent: #0b7285;
  --accent-dark: #075866;
  --accent-soft: #e6f4f6;
  --surface: #ffffff;
  --background: #f4f7f8;
  --border: #d8e1e5;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.1);
  --radius: 18px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

img,
iframe {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 3px solid #f0a202;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(216, 225, 229, 0.9);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  min-height: 72px;
}

.brand {
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding: 0.5rem 0.7rem;
  border-radius: 0.55rem;
  color: var(--ink);
  font-size: 0.93rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

main {
  padding-block: clamp(2.5rem, 6vw, 5.5rem);
}

.eyebrow {
  margin: 0 0 0.45rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.16;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 18ch;
  margin-bottom: 1rem;
  font-size: clamp(2.35rem, 7vw, 4.75rem);
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.15rem);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.32rem);
}

.lede {
  max-width: 65ch;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(0, 1.15fr);
  align-items: center;
  gap: clamp(1.5rem, 5vw, 4.5rem);
}

.hero-photo,
.feature-photo {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-photo img {
  width: 100%;
  height: auto;
}

.feature-photo img {
  width: 100%;
  height: auto;
}

figcaption {
  padding: 0.7rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.intro-copy p {
  margin: 0 0 1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-block: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.65rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 0.65rem;
  background: var(--accent);
  color: white;
  font-weight: 750;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-dark);
  color: white;
}

.button.secondary {
  background: transparent;
  color: var(--accent-dark);
}

.button.secondary:hover {
  background: var(--accent-soft);
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 25px rgba(23, 32, 51, 0.06);
}

.contact-card {
  margin-top: 1.75rem;
  padding: 1.15rem 1.25rem;
}

.contact-card address {
  font-style: normal;
}

.page-heading {
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-heading h1 {
  font-size: clamp(2.25rem, 6vw, 4rem);
}

.section {
  margin-top: clamp(2.5rem, 6vw, 5rem);
}

.research-intro {
  max-width: 78ch;
  margin: 2.5rem auto 0;
}

.research-content {
  max-width: 850px;
  margin-inline: auto;
  font-size: 1.02rem;
}

.research-content > div {
  width: auto !important;
}

.research-content hr {
  margin: 2.5rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.publication-title {
  margin: 0.6rem 0 0.35rem;
  font-size: 1.25rem;
}

.publication-title a {
  text-decoration-thickness: 0.06em;
}

.disclosure-button {
  margin: 0.25rem 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent-dark);
  font: inherit;
  font-weight: 750;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  cursor: pointer;
}

.abstract-content {
  margin: 1rem 0 0.25rem;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 0.7rem 0.7rem 0;
  background: var(--accent-soft);
}

[hidden] {
  display: none !important;
}

.current-teaching {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.course-card {
  padding: 1.2rem;
}

.course-code {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--accent-dark);
  font-weight: 850;
}

.office-card {
  max-width: 760px;
  padding: 1.3rem 1.4rem;
}

.office-card p {
  margin: 0.35rem 0;
}

.history-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  list-style: none;
  overflow: hidden;
}

.history-list li {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 1rem;
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--border);
}

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

.term {
  font-weight: 800;
}

.video-shell {
  position: relative;
  width: min(850px, 100%);
  margin: 2rem auto;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  background: #000;
  box-shadow: var(--shadow);
}

.video-shell iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.narrow {
  max-width: 760px;
  margin-inline: auto;
}

.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 780px) {
  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 0.85rem;
  }

  .site-nav,
  .site-nav ul {
    width: 100%;
  }

  .site-nav ul {
    justify-content: flex-start;
  }

  .hero-grid,
  .current-teaching {
    grid-template-columns: 1fr;
  }

  .hero-photo {
    order: -1;
  }

  .history-list li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 1.2rem, 1120px);
  }

  .site-nav a {
    padding: 0.45rem 0.55rem;
    font-size: 0.86rem;
  }

  main {
    padding-block: 2rem 3.5rem;
  }
}

@media print {
  .site-header,
  .actions,
  .disclosure-button,
  .site-footer {
    display: none;
  }

  body {
    background: white;
  }

  .abstract-content[hidden] {
    display: block !important;
  }
}

.teaching-photo {
  width: min(100%, 580px);
  margin-inline: auto;
}