:root {
  --bg: #f7f9fc;
  --text: #1f2937;
  --muted: #5b6472;
  --primary: #0f766e;
  --dark: #0f172a;
  --card: #ffffff;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.profile-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid white;
    margin-bottom: 20px;
}

.hero {
  background: linear-gradient(135deg, #0f172a, #134e4a);
  color: white;
  padding-bottom: 80px;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo { font-weight: 700; font-size: 1.1rem; }
.nav-links a {
  color: white;
  text-decoration: none;
  margin-left: 20px;
  opacity: 0.9;
}
.nav-links a:hover { opacity: 1; }

.hero-content {
  max-width: 900px;
  margin: 70px auto 0;
  padding: 0 24px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin: 0 0 10px;
}

.subtitle {
  font-size: 1.25rem;
  margin: 0;
  opacity: 0.95;
}

.tagline {
  margin-top: 16px;
  color: #d1fae5;
}

.buttons { margin-top: 28px; }
.btn {
  display: inline-block;
  padding: 11px 18px;
  margin: 6px;
  border: 1px solid white;
  border-radius: 8px;
  color: white;
  text-decoration: none;
}
.btn.primary {
  background: white;
  color: var(--primary);
  border-color: white;
}

.section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 56px 24px;
}

.section.alt {
  max-width: none;
  background: white;
  padding-left: calc((100% - 1000px) / 2 + 24px);
  padding-right: calc((100% - 1000px) / 2 + 24px);
}

h2 {
  font-size: 2rem;
  margin-top: 0;
  color: var(--dark);
}

h3 { color: var(--primary); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.card, .timeline-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
}

.section.alt .card, .section.alt .timeline-item {
  background: var(--bg);
}

.pub-list li { margin-bottom: 16px; }

a { color: var(--primary); }

.contact { text-align: center; }
.small-note { color: var(--muted); font-size: 0.95rem; }

footer {
  text-align: center;
  padding: 28px;
  background: var(--dark);
  color: white;
}
.faculty-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 45px;
    text-align: left;
    max-width: 1050px;
    margin: 0 auto;
}

.hero-photo {
    flex: 0 0 auto;
}

.profile-photo {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

.hero-text {
    max-width: 650px;
}

.profile-links {
    margin-top: 12px;
    font-size: 1rem;
}

.profile-links a {
    text-decoration: none;
    font-weight: 600;
    margin: 0 4px;
}

@media (max-width: 768px) {
    .faculty-hero {
        flex-direction: column;
        text-align: center;
        gap: 25px;
    }

    .profile-photo {
        width: 170px;
        height: 170px;
    }
}

@media (max-width: 700px) {
  nav { flex-direction: column; gap: 14px; }
  .nav-links a { margin: 0 8px; }
  .hero h1 { font-size: 2.3rem; }
}