*{margin:0;padding:0;box-sizing:border-box}body{font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;font-size:16px;line-height:1.6;color:#333;background-color:#f8f9fa}.container{max-width:1200px;margin:0 auto;padding:0 20px}.site-header{background-color:#fff;box-shadow:0 2px 4px rgba(0,0,0,0.1);position:sticky;top:0;z-index:100}.site-nav{display:flex;justify-content:space-between;align-items:center;padding:1rem 0}.site-title{font-size:1.5rem;font-weight:700;color:#2c3e50;text-decoration:none}.nav-links{display:flex;gap:2rem}.nav-links a{color:#333;text-decoration:none;font-weight:500;transition:color 0.3s}.nav-links a:hover{color:#3498db}.hero{background-color:#fff;padding:4rem 0;text-align:center}.hero-title{font-size:3rem;font-weight:700;color:#2c3e50;margin-bottom:0.5rem}.hero-subtitle{font-size:1.25rem;color:#6c757d;margin-bottom:0.5rem}.hero-location{color:#6c757d;margin-bottom:2rem}.hero-links{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.75rem 1.5rem;border-radius:5px;text-decoration:none;font-weight:500;transition:all 0.3s}.btn-primary{background-color:#3498db;color:#fff}.btn-primary:hover{background-color:#217dbb;transform:translateY(-2px)}.btn-secondary{background-color:#e9ecef;color:#333}.btn-secondary:hover{background-color:#cbd3da;transform:translateY(-2px)}section{padding:4rem 0}h2{font-size:2.5rem;font-weight:700;color:#2c3e50;margin-bottom:2rem;text-align:center}h3{font-size:1.5rem;font-weight:600;color:#2c3e50;margin-bottom:1rem}h4{font-size:1.25rem;font-weight:500;color:#333;margin-bottom:0.5rem}.lead{font-size:1.125rem;line-height:1.8;margin-bottom:2rem}.about-content{display:flex;gap:3rem;align-items:flex-start;margin-bottom:2rem}@media (max-width: 768px){.about-content{flex-direction:column;align-items:center}}.about-text{flex:1}.about-photo{flex-shrink:0}.about-photo .profile-photo{width:250px;height:250px;border-radius:12px;object-fit:cover;box-shadow:0 4px 15px rgba(0,0,0,0.1)}@media (max-width: 768px){.about-photo .profile-photo{width:200px;height:200px}}.research-interests{display:flex;flex-wrap:wrap;gap:0.5rem;margin-top:1rem}.tag{background-color:#3498db;color:#fff;padding:0.5rem 1rem;border-radius:25px;font-size:0.875rem;font-weight:500}.timeline{position:relative;padding-left:2rem}.timeline::before{content:'';position:absolute;left:0;top:0;bottom:0;width:2px;background-color:#e9ecef}.timeline-item{position:relative;padding-bottom:2rem}.timeline-item::before{content:'';position:absolute;left:-2.5rem;top:0.5rem;width:12px;height:12px;border-radius:50%;background-color:#3498db;border:3px solid #fff;box-shadow:0 0 0 2px #e9ecef}.timeline-date{font-size:0.875rem;color:#6c757d;font-weight:500;margin-bottom:0.5rem}.timeline-content{background-color:#fff;padding:1.5rem;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,0.1)}.location{font-size:0.875rem;color:#6c757d;margin-bottom:0.5rem}.education-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));gap:2rem}.education-item{background-color:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,0.1)}.education-item .field{color:#3498db;font-weight:500;margin-bottom:0.5rem}.education-item .dates{font-size:0.875rem;color:#6c757d;margin-bottom:0.5rem}.education-item .description{font-size:0.875rem;color:#6c757d;line-height:1.6}.skills-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));gap:2rem;margin-bottom:3rem}.skill-category{background-color:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,0.1)}.skill-tags{display:flex;flex-wrap:wrap;gap:0.5rem}.skill-tag{background-color:#e9ecef;color:#333;padding:0.25rem 0.75rem;border-radius:15px;font-size:0.875rem}.languages{display:grid;grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));gap:1rem;margin-bottom:2rem}.language-item{display:flex;justify-content:space-between;padding:1rem;background-color:#fff;border-radius:5px;box-shadow:0 1px 3px rgba(0,0,0,0.1)}.language-name{font-weight:600}.language-level{color:#6c757d;font-size:0.875rem}.certifications-section{background-color:#fff}.certifications-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(350px, 1fr));gap:2rem;margin-top:2rem}.certification-card{background:#fff;border-radius:12px;box-shadow:0 4px 8px rgba(0,0,0,0.08);border:1px solid rgba(0,0,0,0.06);transition:all 0.3s ease;overflow:hidden;position:relative}.certification-card:hover{transform:translateY(-5px);box-shadow:0 15px 40px rgba(0,0,0,0.15);border-color:rgba(52,152,219,0.2)}.certification-card:hover .cert-logo img{transform:scale(1.1)}.certification-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:#3498db}.cert-header{padding:1.5rem 1.5rem 1rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(0,0,0,0.05)}.cert-logo{width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.02);border-radius:12px;overflow:hidden}.cert-logo img{width:48px;height:48px;object-fit:contain;transition:transform 0.3s ease}.cert-issuer-badge{padding:0.25rem 0.75rem;border-radius:20px;font-size:0.75rem;font-weight:600;letter-spacing:0.5px;text-transform:uppercase}.cert-body{padding:1.5rem}.cert-title{font-size:1.25rem;font-weight:600;color:#2c3e50;margin-bottom:1rem;line-height:1.4}.cert-meta{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:1rem}.cert-meta>div{display:flex;align-items:center;gap:0.5rem;font-size:0.875rem;color:#6c757d}.cert-meta>div i{color:#3498db;font-size:0.875rem}.cert-skills{display:flex;flex-wrap:wrap;gap:0.5rem;margin-bottom:1rem}.cert-skill-tag{background:rgba(52,152,219,0.1);color:#3498db;padding:0.25rem 0.75rem;border-radius:20px;font-size:0.75rem;font-weight:500;border:1px solid rgba(52,152,219,0.2)}.cert-skill-more{display:inline-flex;align-items:center;padding:0.25rem 0.75rem;font-size:0.75rem;color:#6c757d;font-style:italic}.cert-verify-btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.5rem 1rem;background:#3498db;color:#fff;text-decoration:none;border-radius:8px;font-size:0.875rem;font-weight:500;transition:all 0.3s ease;margin-top:0.5rem}.cert-verify-btn:hover{transform:translateX(5px);box-shadow:0 5px 15px rgba(52,152,219,0.4)}.cert-verify-btn i{font-size:0.75rem}.contact-section{background-color:#fff;text-align:center}.contact-info{display:flex;gap:2rem;justify-content:center;flex-wrap:wrap;margin-top:2rem}.contact-link{display:flex;align-items:center;gap:0.5rem;color:#333;text-decoration:none;font-weight:500;transition:color 0.3s}.contact-link:hover{color:#3498db}.contact-link i{font-size:1.25rem}.site-footer{background-color:#2c3e50;color:#fff;padding:2rem 0;text-align:center}@media (max-width: 768px){.hero-title{font-size:2rem}.hero-subtitle{font-size:1rem}.nav-links{display:none}.timeline{padding-left:1rem}h2{font-size:2rem}.certifications-grid{grid-template-columns:1fr;gap:1.5rem}.certification-card .cert-header{padding:1rem}.certification-card .cert-body{padding:1rem}.certification-card .cert-title{font-size:1.1rem}}@media (min-width: 769px) and (max-width: 1024px){.certifications-grid{grid-template-columns:repeat(auto-fill, minmax(300px, 1fr))}}