:root {
     --primary-color: #0078d4;
     --secondary-color: #106ebe;
     --dark-bg: #1a1a1a;
     --light-bg: #f8f9fa;
 }

 body {
     font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
     scroll-behavior: smooth;
 }

 .hero-section {
     background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
     color: white;
     padding: 100px 0 80px;
     position: relative;
     overflow: hidden;
 }

 .hero-section::before {
     content: '';
     position: absolute;
     top: 0;
     left: 0;
     right: 0;
     bottom: 0;
     background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,133.3C960,128,1056,96,1152,90.7C1248,85,1344,107,1392,117.3L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
     background-size: cover;
     opacity: 0.3;
 }

 .hero-content {
     position: relative;
     z-index: 1;
 }

 .section-title {
     position: relative;
     display: inline-block;
     margin-bottom: 2rem;
     padding-bottom: 10px;
 }

 .section-title::after {
     content: '';
     position: absolute;
     bottom: 0;
     left: 0;
     width: 60px;
     height: 3px;
     background: var(--primary-color);
 }

 .card {
     border: none;
     box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
     transition: transform 0.3s ease, box-shadow 0.3s ease;
 }

 .card:hover {
     transform: translateY(-5px);
     box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
 }

 .project-card .card,
 .timeline-item+.card {
     height: 100%;
 }

 .project-card {
     margin-bottom: 30px;
 }

 .skill-badge {
     background: var(--light-bg);
     border: 1px solid #dee2e6;
     padding: 5px 15px;
     border-radius: 20px;
     display: inline-block;
     margin: 5px;
     font-size: 0.9rem;
 }

 .timeline {
     position: relative;
     padding: 20px 0;
 }

 .timeline-item {
     padding: 20px 0;
     position: relative;
     border-left: 2px solid var(--primary-color);
     padding-left: 30px;
     margin-left: 10px;
 }

 .timeline-item::before {
     content: '';
     position: absolute;
     left: -8px;
     top: 25px;
     width: 14px;
     height: 14px;
     border-radius: 50%;
     background: var(--primary-color);
     border: 3px solid white;
     box-shadow: 0 0 0 2px var(--primary-color);
 }

 .navbar {
     background: white !important;
     box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
 }

 .navbar-brand {
     font-weight: 600;
     color: var(--primary-color) !important;
 }

 .nav-link {
     color: #333 !important;
     font-weight: 500;
     transition: color 0.3s ease;
 }

 .nav-link:hover {
     color: var(--primary-color) !important;
 }

 .btn-primary {
     background: var(--primary-color);
     border: none;
     padding: 10px 30px;
 }

 .btn-primary:hover {
     background: var(--secondary-color);
 }

 .social-links a {
     display: inline-block;
     width: 40px;
     height: 40px;
     line-height: 40px;
     text-align: center;
     border-radius: 50%;
     background: rgba(255, 255, 255, 0.2);
     color: white;
     margin: 0 5px;
     transition: all 0.3s ease;
 }

 .social-links a:hover {
     background: white;
     color: var(--primary-color);
     transform: translateY(-3px);
 }

 .footer {
     background: var(--dark-bg);
     color: white;
     padding: 40px 0 20px;
 }

 .competency-card {
     background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
     color: white;
     border-radius: 10px;
     padding: 20px;
     margin-bottom: 20px;
 }

 .talk-card {
     background: var(--light-bg);
     padding: 20px;
     border-radius: 10px;
     margin-bottom: 20px;
     border-left: 4px solid var(--primary-color);
 }