/* Global */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, sans-serif;
  background: #f5f7ff;
  color: #111827;
  line-height: 1.6;
}

/* Top navigation */
.top-bar {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  padding: 0.7rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.logo {
  color: #fff;
  font-weight: bold;
  font-size: 1rem;
}

.logo span {
  color: #60a5fa;
}

.nav-menu {
  display: flex;
  gap: 1.2rem;
}

.nav-menu a {
  color: #e5e7eb;
  text-decoration: none;
  font-size: 0.95rem;
}

/* HERO SECTION */
.hero {
  padding: 3rem 1.5rem 2rem;
  background: linear-gradient(135deg, #e5f0ff, #c7d2fe);
}

.hero-inner {
  max-width: 900px;
  margin: auto;
}

.hero-layout {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* MUCH SMALLER PROFILE PICTURE */
.hero-photo {
  width: 110px;
  height: 110px;
  border-radius: 999px;
  overflow: hidden;
  border: 3px solid #93c5fd;
  flex-shrink: 0;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: 0.95rem;
}

/* Sections */
.section {
  max-width: 800px;
  margin: auto;
  padding: 2.5rem 1.5rem;
}

.section h2 {
  margin-bottom: 1rem;
  font-size: 1.4rem;
}

.publication {
  margin-bottom: 1.2rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 1rem;
  color: #6b7280;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
  .hero-layout {
    flex-direction: column;
    text-align: center;
  }

  .hero-photo {
    margin-bottom: 0.5rem;
  }
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}