body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: #333;
  background: #fff;
}

a {
  color: #1a73e8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header / Nav */
header {
  background: #2c3e50;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}

.navbar {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 56px;
}

.navbar .site-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: .5px;
}

.navbar .site-title:hover {
  text-decoration: none;
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
}

.nav-links li a {
  color: #ccc;
  font-size: .9rem;
  padding: 6px 12px;
  border-radius: 4px;
  display: block;
}

.nav-links li a:hover,
.nav-links li a.active {
  color: #fff;
  background: rgba(255,255,255,.12);
  text-decoration: none;
}

/* Hamburger for mobile */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  margin: 5px 0;
  transition: .3s;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
  color: #fff;
  padding: 64px 24px 48px;
  text-align: center;
}

.hero h1 {
  font-size: 2rem;
  margin: 0 0 8px;
  font-weight: 700;
}

.hero .subtitle {
  font-size: 1rem;
  opacity: .85;
  margin-bottom: 16px;
}

/* Main content */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: #2c3e50;
  border-bottom: 2px solid #3498db;
  padding-bottom: 6px;
  margin: 36px 0 16px;
}

.section-title:first-child {
  margin-top: 0;
}

/* Info grid */
.info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.info-card {
  background: #f8f9fa;
  border-left: 4px solid #3498db;
  padding: 20px 24px;
  border-radius: 0 8px 8px 0;
}

.info-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: #2c3e50;
}

.info-card p {
  margin: 0;
  font-size: .95rem;
}

/* Bio links */
.bio-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.bio-links a {
  display: inline-block;
  background: #3498db;
  color: #fff;
  padding: 6px 16px;
  border-radius: 4px;
  font-size: .88rem;
}

.bio-links a:hover {
  background: #2980b9;
  text-decoration: none;
}

/* What's new */
.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-list li {
  padding: 10px 0;
  border-bottom: 1px solid #eee;
  font-size: .92rem;
}

.news-list li:last-child {
  border-bottom: none;
}

.news-list .date {
  color: #888;
  font-weight: 600;
  margin-right: 8px;
  white-space: nowrap;
}

/* Publication list */
.pub-section {
  margin-bottom: 32px;
}

.pub-section > h3 {
  font-size: 1.2rem;
  color: #2c3e50;
  margin: 0 0 16px;
  padding-bottom: 4px;
  border-bottom: 1px solid #e0e0e0;
}

.pub-item {
  padding: 8px 0 8px 20px;
  font-size: .9rem;
  line-height: 1.6;
  position: relative;
  border-bottom: 1px solid #f0f0f0;
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-item::before {
  content: "\2022";
  position: absolute;
  left: 4px;
  color: #3498db;
}

.pub-item strong {
  color: #2c3e50;
}

/* Footer */
footer {
  background: #2c3e50;
  color: #aaa;
  text-align: center;
  padding: 24px;
  font-size: .82rem;
}

footer a {
  color: #3498db;
}

/* Responsive */
@media (max-width: 700px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: #2c3e50;
    flex-direction: column;
    padding: 12px 0;
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .hero h1 {
    font-size: 1.5rem;
  }
}