:root {
  --pico-font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --pico-font-size: 15px;
  --pico-line-height: 1.6;
}

main {
  max-width: 780px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

header .intro {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

header .avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

header .intro-text h1 {
  margin-bottom: 0.2rem;
}

header .tagline {
  color: var(--pico-muted-color);
  margin: 0 0 0.6rem;
}

header .bio {
  margin: 0 0 0.4rem;
  font-size: 0.95em;
}

header .contact {
  margin: 0;
  font-size: 0.9em;
  color: var(--pico-muted-color);
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin-top: 1.8rem;
  font-size: 0.95em;
}

header nav a {
  text-decoration: none;
  font-weight: 500;
}

header nav a:hover {
  text-decoration: underline;
}

@media (max-width: 500px) {
  header .intro {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  header .social {
    justify-content: center;
  }
}

section {
  margin-top: 2.5rem;
}

section h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
}

section h3 {
  font-size: 1.15rem;
  margin-top: 1.8rem;
  margin-bottom: 0.3rem;
}

section h4 {
  font-size: 1rem;
  margin-top: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--pico-color);
  font-weight: 600;
  opacity: 0.75;
}

ul.pubs,
ul.compact {
  list-style: none !important;
  padding-left: 0 !important;
  margin-left: 0;
}

ul.pubs li,
ul.compact li {
  list-style: none;
  padding-left: 0;
}

ul.pubs li::marker,
ul.compact li::marker {
  content: "";
}

ul.pubs li {
  margin-bottom: 1rem;
}

ul.pubs .title {
  font-weight: 600;
}

ul.pubs .authors {
  font-size: 0.92em;
  color: var(--pico-color);
}

ul.pubs .venue {
  font-size: 0.92em;
  color: var(--pico-muted-color);
}

ul.pubs .links {
  font-size: 0.85em;
  margin-top: 0.15rem;
}

ul.pubs .award {
  font-size: 0.85em;
  margin-top: 0.2rem;
  color: #b8860b;
  font-weight: 600;
}

ul.compact li {
  margin-bottom: 0.8rem;
}

ul.compact small {
  color: var(--pico-muted-color);
}

.to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 2.6rem;
  height: 2.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--pico-primary-background);
  color: var(--pico-primary-inverse);
  border-radius: 50%;
  text-decoration: none;
  font-size: 1.2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  opacity: 0.85;
  transition: opacity 0.2s;
}

.to-top:hover {
  opacity: 1;
  text-decoration: none;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--pico-muted-border-color);
  text-align: center;
  color: var(--pico-muted-color);
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}