/* Shared style tokens */
:root{
    --primary-color:#1a365d;
    --secondary-color:#2c5282;
    --accent-color:#d4af37;
    --text-dark:#2d3748;
    --text-light:#718096;
    --bg-light:#f7fafc;
    --bg-white:#ffffff;
    --border-color:#e2e8f0;
    --shadow-lg:0 8px 20px rgba(0,0,0,0.08);
}

*{box-sizing:border-box}
body{font-family:Roboto,system-ui,Arial,sans-serif;margin:0;color:var(--text-dark);line-height:1.5}
.container{max-width:1100px;margin:0 auto;padding:2rem}
.site-header{background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));color:white}
.nav{display:flex;align-items:center;justify-content:space-between;padding:1rem 0}
.brand{font-family:Playfair Display,serif;font-size:1.25rem;color:white;text-decoration:none}
.nav-menu{list-style:none;display:flex;gap:1rem;margin:0;padding:0}
.nav-menu a{color:white;text-decoration:none}
.nav-toggle{display:none;color:white}

/* Hero */
.hero{padding:4rem 0;background:linear-gradient(180deg,rgba(26,54,93,0.06),transparent)}
.hero-grid{display:grid;grid-template-columns:1fr 320px;gap:2rem;align-items:center}
.hero h1{font-family:Playfair Display,serif;font-size:2.2rem;margin:0}
.lead{color:var(--text-light);font-size:1.05rem}
.cta{display:inline-block;margin-top:1rem;background:var(--accent-color);color:#111;padding:0.6rem 1rem;border-radius:6px;text-decoration:none}

.hero-image .profile-image{width:220px;height:220px;border-radius:50%;object-fit:cover;border:4px solid var(--accent-color);box-shadow:var(--shadow-lg)}

/* About */
.about{background:var(--bg-light);padding:2rem 0}
.about-content{display:grid;grid-template-columns:320px 1fr;gap:2rem;align-items:center}
.profile-image{width:250px;height:250px;border-radius:50%;object-fit:cover;display:block;margin:0 auto;border:4px solid var(--accent-color);box-shadow:var(--shadow-lg)}
.credentials{display:flex;flex-direction:column;gap:0.8rem;margin-top:1rem}
.credential-item{display:flex;gap:0.8rem;align-items:center}
.credential-item i{font-size:1.5rem;color:var(--primary-color)}

/* Research & Publications */
.research, .publications{padding:2rem 0}
.section-header{display:flex;align-items:center;gap:1rem;margin-bottom:2rem}
.section-title{font-family:Playfair Display,serif;margin:0;font-size:1.6rem}
.section-divider{flex:1;height:1px;background:var(--border-color)}

.publications-note{margin-bottom:2rem;padding:1rem;background:var(--bg-light);border-radius:8px;border-left:4px solid var(--accent-color)}

.publication-year{margin-bottom:2.5rem}
.publication-year h3{font-family:Playfair Display,serif;color:var(--primary-color);margin:0 0 1.5rem 0;font-size:1.4rem;border-bottom:2px solid var(--accent-color);padding-bottom:0.5rem}

.publication-item{background:white;margin-bottom:1.5rem;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.06);border-left:3px solid var(--secondary-color)}
.publication-item h4{margin:0 0 0.8rem 0;color:var(--text-dark);font-size:1.1rem;line-height:1.4}
.publication-item p{margin:0.4rem 0;color:var(--text-light);font-size:0.95rem}
.publication-item p strong{color:var(--text-dark)}
.publication-item a{color:var(--primary-color);text-decoration:none}
.publication-item a:hover{text-decoration:underline}

/* Contact & Footer */
.contact{padding:2rem 0}
.contact-grid{display:flex;gap:2rem}
.site-footer{background:#fff;padding:1.2rem 0;border-top:1px solid var(--border-color);text-align:center}

/* Responsive */
@media (max-width:900px){
    .hero-grid{grid-template-columns:1fr}
    .about-content{grid-template-columns:1fr}
    .nav-menu{display:none}
    .nav-toggle{display:block}
}