:root {
  --background: #ffffff;
  --surface: #f7f8fa;
  --text: #1f2933;
  --muted: #5f6c7b;
  --line: #d7dce2;
  --link: #1e4f8a;
  --link-hover: #123760;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

h1,
h2,
h3 {
  margin: 0;
  color: #111827;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  line-height: 1.2;
}

p {
  margin: 0 0 0.75rem;
}

.container {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
}

.site-title {
  color: #111827;
  font-size: 1.85rem;
  font-weight: 600;
}

.site-title:hover {
  color: #111827;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.84rem;
  padding-bottom: 0.2rem;
}

.site-nav a.active {
  color: #111827;
  border-bottom: 1px solid #111827;
}

main {
  padding: 1.75rem 0 2.5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) 230px;
  gap: 1.5rem;
  align-items: start;
  padding-bottom: 1.5rem;
}

.kicker {
  margin-bottom: 0.65rem;
  color: var(--muted);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}

.page-section h1,
.post h1 {
  font-size: clamp(1.85rem, 4vw, 2.45rem);
  margin-bottom: 0.75rem;
}

.hero-copy p,
.page-intro,
.timeline-body p,
.publication-item p,
.blog-item p,
.post p,
.summary-box li,
.timeline-list li {
  color: var(--muted);
}

.hero-photo {
  justify-self: end;
}

.hero-photo img {
  width: 100%;
  border: 1px solid var(--line);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.9rem;
  margin-top: 0.85rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.contact-link img {
  display: block;
  flex: 0 0 0.9rem;
  width: 0.9rem;
  min-width: 0.9rem;
  max-width: 0.9rem;
  height: 0.9rem;
  min-height: 0.9rem;
  max-height: 0.9rem;
  object-fit: contain;
  opacity: 0.92;
}

.contact-link span {
  color: var(--muted);
}

.section,
.page-section,
.post {
  border-top: 1px solid var(--line);
  padding-top: 1.35rem;
  margin-top: 1.35rem;
}

.section:first-of-type,
.page-section:first-of-type,
.post:first-of-type {
  margin-top: 0;
}

.section h2,
.page-section h1 {
  margin-bottom: 0.85rem;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(220px, 0.9fr);
  gap: 1.4rem;
}

.summary-box {
  padding: 0.9rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
}

.summary-box h3 {
  font-size: 1.1rem;
  margin-bottom: 0.55rem;
}

.plain-list {
  margin: 0;
  padding-left: 1rem;
}

.timeline {
  --date-column: 150px;
  --spine-gap: 1.15rem;
  --spine-x: calc(var(--date-column) + (var(--spine-gap) / 2));
  position: relative;
  display: grid;
  gap: 1.15rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.25rem;
  bottom: 0.25rem;
  left: var(--spine-x);
  width: 2px;
  background: #d0d5db;
}

.timeline-entry {
  position: relative;
  display: grid;
  grid-template-columns: var(--date-column) minmax(0, 1fr);
  gap: var(--spine-gap);
}

.timeline-entry::before {
  content: "";
  position: absolute;
  top: 0.18rem;
  left: calc(var(--spine-x) - 0.38rem);
  width: 0.76rem;
  height: 0.76rem;
  border: 2px solid #d0d5db;
  border-radius: 50%;
  background: #ffffff;
  z-index: 1;
}

.timeline-date,
.timeline-meta {
  color: var(--muted);
  font-size: 0.93rem;
}

.timeline-date {
  padding-right: 1rem;
  text-align: right;
}

.timeline-heading {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  margin-bottom: 0.5rem;
}

.timeline-logo {
  flex: 0 0 56px;
  width: 56px;
  height: 56px;
  padding: 0.45rem;
  border: 1px solid var(--line);
  background: #ffffff;
}

.timeline-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.timeline-body h3,
.publication-item h2,
.blog-item h2 {
  font-size: 1.15rem;
  margin-bottom: 0.2rem;
}

.timeline-list,
.blog-list {
  display: grid;
  gap: 0.35rem;
}

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

.entry-tag {
  display: inline-block;
  min-width: 5.2rem;
  color: #111827;
  font-size: 0.9rem;
  font-weight: 600;
}

.publication-list {
  margin: 0;
  padding-left: 1.2rem;
}

.publication-item,
.blog-item {
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
}

.publication-item:first-child,
.blog-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-content {
  padding-top: 1.5rem;
}

.post {
  max-width: 720px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1rem 0 1.5rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 760px) {
  .header-inner,
  .hero,
  .two-column,
  .footer-inner {
    display: grid;
    grid-template-columns: 1fr;
  }

  .site-nav {
    gap: 1rem;
  }

  .hero {
    gap: 1.2rem;
  }

  .hero-photo {
    max-width: 230px;
    justify-self: start;
  }

  .timeline {
    --spine-x: 0.35rem;
  }

  .timeline-entry {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.45rem;
    padding-left: 1.5rem;
  }

  .timeline-entry::before {
    left: calc(var(--spine-x) - 0.38rem);
  }

  .timeline-date {
    margin-bottom: -0.1rem;
    padding-right: 0;
    text-align: left;
  }
}