:root {
  --text: #494e52;
  --muted: #7a8288;
  --line: #f2f3f3;
  --link: #52adc8;
  --link-hover: #2b89a4;
  --accent: #e34343;
  --bg: #ffffff;
  --soft: #f8f9fa;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0 0 120px;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, ".SFNSText-Regular", "San Francisco", Roboto, "Segoe UI", "Helvetica Neue", "Lucida Grande", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.55;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

.masthead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1250px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  gap: 32px;
}

.site-title {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
  color: var(--muted);
  font-size: 18px;
}

.nav a {
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
}

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

.layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 780px);
  column-gap: 60px;
  width: min(1250px, calc(100% - 40px));
  margin: 54px auto 0;
}

.sidebar {
  position: sticky;
  top: 112px;
  align-self: start;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.avatar {
  display: block;
  width: 220px;
  height: 220px;
  margin: 0 0 18px;
  border: 1px solid #e6e6e6;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 18%;
  background: var(--soft);
  padding: 5px;
}

.sidebar-info {
  color: #003a70;
  font-size: 14px;
  line-height: 1.28;
}

.sidebar-info p {
  margin: 0 0 3px;
  white-space: nowrap;
}

.sidebar-info strong {
  color: #002a4d;
}

.sidebar-title,
.sidebar-affiliation {
  color: #003a70;
}

.content {
  min-width: 0;
}

.section {
  scroll-margin-top: 96px;
  margin: 0 0 32px;
}

.section h1 {
  margin: 0 0 14px;
  color: var(--text);
  font-size: 28px;
  line-height: 1.25;
}

.lead {
  margin-top: 0;
  color: var(--muted);
  font-size: 18px;
}

.lead:empty {
  display: none;
}

.intro strong {
  color: var(--text);
  font-weight: 700;
}

p {
  margin: 0 0 22px;
}

.notice {
  color: var(--accent);
  font-weight: 600;
}

.notice:empty {
  display: none;
}

.pub-list {
  display: grid;
  gap: 20px;
}

.publication {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.publication h2 {
  margin: 0 0 6px;
  color: var(--text);
  font-size: 18px;
  line-height: 1.35;
}

.publication p {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 16px;
}

.publication p strong {
  color: var(--text);
  font-weight: 700;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 15px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 18px;
}

.timeline-date {
  color: var(--muted);
  font-size: 15px;
}

.timeline-title {
  margin: 0;
  color: var(--text);
  font-weight: 700;
}

.timeline-meta {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.email-line {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  body {
    font-size: 17px;
  }

  .masthead__inner {
    min-height: 68px;
  }

  .layout {
    grid-template-columns: 1fr;
    margin-top: 32px;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: 120px 1fr;
    column-gap: 22px;
    align-items: center;
    margin-bottom: 34px;
  }

  .avatar {
    grid-row: span 5;
    width: 120px;
    height: 120px;
    margin: 0;
  }

  .sidebar-info {
    grid-column: 2;
    font-size: 13px;
  }
}

@media (max-width: 620px) {
  .masthead__inner {
    width: min(100% - 28px, 1250px);
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 12px 0;
  }

  .nav {
    gap: 20px;
    font-size: 16px;
  }

  .layout {
    width: min(100% - 28px, 1250px);
  }

  .sidebar {
    grid-template-columns: 88px minmax(0, 1fr);
    column-gap: 12px;
  }

  .avatar {
    width: 88px;
    height: 88px;
  }

  .sidebar-info {
    font-size: 12px;
    line-height: 1.25;
  }

  .section h1 {
    font-size: 25px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}