:root {
  --background: #fafaf7;
  --text: #20231f;
  --muted: #666b65;
  --accent: #234d3b;
  --rule: #d9ddd7;
  --placeholder: #f1f2ed;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 112.5%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: "Times New Roman", Times, serif;
  font-size: 1rem;
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  padding: 8px 12px;
  background: var(--background);
  transform: translateY(-160%);
}

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

.site-header,
main,
.site-footer {
  width: min(900px, calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
  background: var(--background);
}

.scroll-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 1px;
  overflow: hidden;
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

.site-name {
  color: var(--text);
  font-size: 1.125rem;
  font-weight: 650;
  text-decoration: none;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  text-decoration: none;
}

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

nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 650;
}

main {
  padding: 54px 0 64px;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  align-items: start;
  gap: clamp(40px, 8vw, 92px);
  margin-bottom: 58px;
  scroll-margin-top: 24px;
}

.intro-copy {
  max-width: 620px;
}

h1 {
  margin: 0 0 4px;
  font-size: clamp(2.25rem, 5vw, 2.5rem);
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.role {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 1.0625rem;
}

.summary {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.6;
}

.job-market-note {
  margin: 22px 0 0;
  padding: 9px 0 9px 13px;
  border-left: 3px solid var(--accent);
  color: var(--text);
  font-size: 0.9375rem;
}

.job-market-note strong {
  color: var(--accent);
  font-weight: 650;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 20px 0 0;
  font-size: 0.875rem;
}

.photo-placeholder,
.profile-photo {
  width: 180px;
  aspect-ratio: 4 / 5;
}

.photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 2px;
  border: 1px dashed #aeb4ac;
  background: var(--placeholder);
  color: var(--muted);
  text-align: center;
}

.photo-placeholder span {
  font-size: 0.875rem;
  font-weight: 600;
}

.photo-placeholder small {
  font-size: 0.75rem;
}

.profile-photo {
  display: block;
  object-fit: cover;
}

.section {
  scroll-margin-top: 24px;
}

.section + .section {
  margin-top: 54px;
}

.page-heading {
  max-width: 720px;
  margin-bottom: 54px;
}

.page-heading p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 1.0625rem;
}

h2 {
  margin: 0 0 22px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--rule);
  font-size: 1.375rem;
  font-weight: 650;
  line-height: 1.3;
}

.research-group + .research-group {
  margin-top: 50px;
}

.research-list .research-group > h2 {
  margin: 0 0 24px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 650;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper + .paper {
  margin-top: 28px;
}

.paper h3,
.paper h4 {
  margin: 0 0 3px;
  font-size: 1.125rem;
  font-weight: 650;
  line-height: 1.4;
}

.paper-citation {
  color: var(--muted);
}

.paper-meta {
  margin: 3px 0 0;
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.paper-citation {
  margin: 2px 0 5px;
  font-size: 0.875rem;
}

.paper-links {
  margin: 0;
  font-size: 0.875rem;
}

.research-preview .paper-links {
  margin-top: 14px;
}

.paper-links a + a::before {
  display: inline-block;
  margin: 0 12px;
  color: var(--rule);
  content: "/";
  text-decoration: none;
}

.paper-abstract {
  max-width: 760px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.abstract-label {
  color: var(--text);
  font-weight: 650;
}

.paper-summary {
  max-width: 760px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.paper-summary-placeholder {
  color: var(--muted);
  font-style: italic;
}

.site-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 22px;
  padding: 22px 0 28px;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}

@media (max-width: 600px) {
  .site-header,
  main,
  .site-footer {
    width: min(100% - 32px, 900px);
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 20px 0;
  }

  nav ul {
    gap: 8px 18px;
  }

  main {
    padding: 40px 0 48px;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 46px;
  }

  .photo-placeholder,
  .profile-photo {
    width: 150px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}