:root {
  --text: #4a4f54;
  --heading: #41464b;
  --muted: #70767b;
  --accent: #6e9ca8;
  --accent-dark: #4d7d89;
  --line: #e8ebed;
  --soft: #f6f8f9;
  --avatar: #eef4f5;
  --white: #ffffff;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

::selection {
  background: #dcebed;
  color: var(--heading);
}

.site-shell {
  min-height: 100vh;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6rem 0.85rem;
  border-radius: 4px;
  background: var(--heading);
  color: var(--white);
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgb(255 255 255 / 94%);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  width: min(calc(100% - 2rem), var(--max-width));
  min-height: 64px;
  align-items: center;
  margin-inline: auto;
}

.brand {
  color: var(--heading);
  font-size: 1rem;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-left: 2.8rem;
}

.site-nav a {
  color: var(--text);
  font-size: 0.92rem;
  transition: color 160ms ease;
}

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

.mobile-navigation {
  display: none;
}

.page-layout {
  display: grid;
  width: min(calc(100% - 2rem), var(--max-width));
  grid-template-columns: 190px minmax(0, 1fr);
  gap: clamp(2.5rem, 5vw, 4.25rem);
  align-items: start;
  margin-inline: auto;
  padding-block: 3.2rem 5.5rem;
}

.profile-sidebar {
  position: sticky;
  top: 98px;
  min-width: 0;
}

.profile-avatar {
  width: 152px;
  height: 152px;
  overflow: hidden;
  border: 1px solid #dce7e9;
  border-radius: 50%;
  background: var(--avatar);
}

.profile-avatar img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.65);
  transform-origin: 50% 60%;
}

.profile-summary {
  margin-top: 1rem;
}

.profile-name {
  margin: 0 0 0.15rem;
  color: var(--heading);
  font-size: 1.05rem;
  font-weight: 700;
}

.profile-summary > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.48;
}

.profile-meta {
  display: grid;
  gap: 0.62rem;
  margin: 1.35rem 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
  list-style: none;
}

.profile-meta li,
.profile-meta a {
  color: inherit;
}

.profile-meta span {
  display: inline-block;
  width: 1.25rem;
  color: var(--accent);
  text-align: center;
}

.profile-meta a:hover {
  color: var(--accent-dark);
}

.profile-email-button {
  display: none;
}

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

.intro-section,
.content-section {
  scroll-margin-top: 88px;
}

.intro-section {
  padding-bottom: 1rem;
}

.intro-section h1 {
  margin: 0 0 1.5rem;
  color: var(--heading);
  font-size: clamp(2rem, 3.2vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.intro-section h2,
.content-section > h2 {
  margin: 0 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--line);
  color: var(--heading);
  font-size: 1.52rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.intro-section p,
.content-section > p {
  margin: 0 0 1.25rem;
}

.content-section {
  margin-top: 2.8rem;
}

.research-list {
  margin: 0.8rem 0 0;
  padding-left: 1.35rem;
}

.research-list li {
  margin: 0.75rem 0;
  padding-left: 0.25rem;
}

.research-list strong {
  color: var(--heading);
}

.research-list span {
  display: block;
  margin-top: 0.12rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.publication-list {
  display: grid;
  gap: 1.35rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.publication-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 116px;
  gap: 1.25rem;
  align-items: start;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--line);
}

.publication-copy {
  min-width: 0;
}

.publication-item h3 {
  margin: 0;
  color: var(--heading);
  font-size: 1rem;
  line-height: 1.46;
}

.publication-title-link {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: rgb(78 126 137 / 28%);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.publication-title-link:hover {
  color: var(--heading);
  text-decoration-color: currentColor;
}

.publication-authors,
.publication-venue {
  margin: 0.38rem 0 0;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.55;
}

.publication-venue {
  margin-top: 0.18rem;
  color: var(--muted);
  font-style: italic;
}

.publication-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem;
}

.publication-tags span {
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.publication-tags span:not(:last-child)::after {
  color: #b5bbbe;
  content: " ·";
}

.publication-tags .publication-number {
  width: 100%;
  color: var(--accent-dark);
  font-weight: 700;
}

.publication-tags .publication-number::after {
  content: "";
}

.background-block {
  margin-top: 1.65rem;
}

.background-block > h3 {
  margin: 0 0 0.55rem;
  color: var(--heading);
  font-size: 1rem;
}

.timeline-item {
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.timeline-topline {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.timeline-item h3 {
  margin: 0;
  color: var(--heading);
  font-size: 0.98rem;
}

.timeline-item time {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.78rem;
}

.timeline-role {
  margin: 0.28rem 0 0;
  color: var(--accent-dark);
  font-size: 0.88rem;
  font-weight: 600;
}

.timeline-item > p:last-child {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.contact-link {
  display: inline-block;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
  padding: 1.5rem 0 2.2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

.site-footer p {
  margin: 0;
}

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

@media (max-width: 860px) {
  .page-layout {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    padding-top: 2.2rem;
  }

  .profile-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) auto;
    gap: 0.9rem;
    align-items: center;
    padding-bottom: 1.35rem;
    border-bottom: 1px solid var(--line);
  }

  .profile-avatar {
    width: 64px;
    height: 64px;
    font-size: 1.45rem;
  }

  .profile-summary {
    margin-top: 0;
  }

  .profile-meta {
    display: none;
  }

  .profile-email-button {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    padding: 0.35rem 0.75rem;
    border: 1px solid #d7dcdf;
    border-radius: 4px;
    color: var(--muted);
    font-size: 0.78rem;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15.5px;
  }

  .header-inner {
    min-height: 62px;
  }

  .site-nav {
    display: none;
  }

  .mobile-navigation {
    position: relative;
    display: block;
    margin-left: auto;
  }

  .mobile-navigation summary {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border-radius: 3px;
    background: #71777b;
    color: var(--white);
    cursor: pointer;
    font-size: 1.35rem;
    list-style: none;
  }

  .mobile-navigation summary::-webkit-details-marker {
    display: none;
  }

  .mobile-navigation > div {
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    display: grid;
    min-width: 165px;
    padding: 0.4rem;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: var(--white);
    box-shadow: 0 10px 26px rgb(44 56 60 / 12%);
  }

  .mobile-navigation a {
    padding: 0.55rem 0.7rem;
    color: var(--text);
    font-size: 0.86rem;
  }

  .page-layout {
    width: min(calc(100% - 1.8rem), var(--max-width));
    padding-block: 1.8rem 4rem;
  }

  .profile-sidebar {
    grid-template-columns: 54px minmax(0, 1fr) auto;
    gap: 0.72rem;
  }

  .profile-avatar {
    width: 54px;
    height: 54px;
    font-size: 1.25rem;
  }

  .profile-name {
    font-size: 0.98rem;
  }

  .profile-summary > p:last-child {
    font-size: 0.78rem;
  }

  .intro-section h1 {
    font-size: 2rem;
  }

  .intro-section h2,
  .content-section > h2 {
    font-size: 1.4rem;
  }

  .publication-item {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .publication-tags {
    justify-content: flex-start;
  }

  .publication-tags .publication-number {
    width: auto;
    margin-right: 0.15rem;
  }

  .timeline-topline {
    flex-direction: column;
    gap: 0.25rem;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}