/* Style B: Modern with Subtle Animations */

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #1a1a2e;
  background: #f7f8fc;
  font-size: 15px;
}
a { text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.3; }

/* === Layout === */
.section-container,
.hero-container,
.nav-container,
.footer-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === Navigation === */
.site-header {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
  position: relative;
}
.nav-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: #1a1a2e;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  color: #555;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  transition: color 0.2s;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #2563eb;
  transition: width 0.3s ease;
}
.nav-links a:hover { color: #2563eb; }
.nav-links a:hover::after { width: 100%; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #1a1a2e;
  transition: transform 0.3s, opacity 0.3s;
}

/* === Hero === */
.hero {
  padding: 1.5rem 0 1rem;
  margin-bottom: 1rem;
  background: #fff;
}
.hero-container {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}
.hero-photo img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  border: 3px solid #fff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hero-photo img:hover {
  transform: scale(1.03);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}
.hero-info h1 {
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.hero-title {
  font-size: 1.1rem;
  color: #2563eb;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.hero-affiliation {
  color: #555;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}
.hero-affiliation a {
  color: #2563eb;
  transition: color 0.2s;
}
.hero-affiliation a:hover { color: #1d4ed8; }
.hero-contact {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 0.5rem;
}
.hero-contact a {
  color: #2563eb;
  transition: color 0.2s;
}
.hero-contact a:hover { color: #1d4ed8; }
.hero-contact span + a::before { content: " · "; color: #555; }
.hero-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.25rem;
}
.hero-links a {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: #2563eb;
  border: 1.5px solid #2563eb;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s, transform 0.15s;
}
.hero-links a:hover {
  background: #2563eb;
  color: #fff;
  transform: translateY(-1px);
}

/* === Sections === */
.section {
  padding: 1rem 0;
}
.section-container {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  padding: 2rem;
  transition: box-shadow 0.3s ease;
}
.section-container:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: #1a1a2e;
  display: inline-block;
  position: relative;
}
h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 2rem;
  height: 3px;
  background: #2563eb;
  border-radius: 2px;
}
h3 {
  font-size: 1rem;
  font-weight: 600;
}

/* === Entries === */
.entry { margin-bottom: 1.5rem; }
.entry:last-child { margin-bottom: 0; }
.entry-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.entry-date {
  font-size: 0.85rem;
  color: #555;
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}
.entry-role {
  font-weight: 600;
  color: #2563eb;
  font-size: 0.95rem;
}
.entry-detail {
  font-size: 0.85rem;
  color: #555;
}
.entry p, .entry ul { font-size: 0.95rem; }
.entry ul {
  list-style: disc;
  padding-left: 1.25rem;
  margin-top: 0.25rem;
}

/* === Publications === */
.pub-entry {
  margin-bottom: 1.5rem;
  padding: 1rem;
  border-radius: 8px;
  border-left: 3px solid #2563eb;
  background: #f7f8fc;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.pub-entry:last-child { margin-bottom: 0; }
.pub-entry:hover {
  transform: translateX(4px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.pub-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}
.pub-authors {
  font-size: 0.9rem;
  color: #555;
}
.pub-venue {
  font-size: 0.85rem;
  color: #555;
  font-style: italic;
}
.pub-note {
  font-size: 0.8rem;
  color: #2563eb;
  font-weight: 500;
  margin-top: 0.15rem;
}

/* === Skills === */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}
.skill-group {
  padding: 1rem;
  background: #f7f8fc;
  border-radius: 8px;
}
.skill-group h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #2563eb;
  margin-bottom: 0.25rem;
}

/* === Footer === */
.site-footer {
  padding: 2rem 0;
  font-size: 0.85rem;
  color: #555;
  background: #fff;
}
.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-links {
  display: flex;
  gap: 1rem;
}
.footer-links a {
  color: #555;
  transition: color 0.2s;
}
.footer-links a:hover { color: #2563eb; }

/* === Scroll Animations === */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* === Mobile === */
@media (max-width: 700px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e5e7eb;
  }
  .nav-links.open { display: flex; }
  .hero-container {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  .hero-photo img {
    width: 120px;
    height: 120px;
    margin: 0 auto;
  }
  .hero-links { justify-content: center; }
  .entry-header { flex-direction: row; }
}