:root {
            --primary-blue: #003366;
            --secondary-gold: #D4AF37;
            --accent-teal: #008080;
            --light-gray: #f8f9fa;
            --dark-gray: #343a40;
            --transition: all 0.3s ease-in-out;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary-blue) !important;
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--accent-teal) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(0, 80, 128, 0.8)), url('https://images.unsplash.com/photo-1532094349884-543bc11b234d?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .section-title {
            color: var(--primary-blue);
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 2.5rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-gold);
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: var(--primary-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.8rem;
            transition: var(--transition);
        }
        .flink {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            margin: 0.5rem;
            background: var(--light-gray);
            border-radius: 50px;
            color: var(--dark-gray);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-blue);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background: var(--primary-blue);
            color: white;
        }
        .footer-link {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: white;
            padding-left: 5px;
        }
        .research-highlight {
            border-left: 4px solid var(--accent-teal);
            padding-left: 1.5rem;
            background: #f0f8ff;
            padding: 2rem;
            border-radius: 0 8px 8px 0;
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.95);
        }
        .btn-primary-custom {
            background: var(--primary-blue);
            border: none;
            padding: 0.75rem 2rem;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background: var(--accent-teal);
            transform: translateY(-3px);
        }
        .publication-item {
            padding: 1rem;
            border-bottom: 1px solid #eee;
            transition: var(--transition);
        }
        .publication-item:hover {
            background: #f8f9fa;
            padding-left: 1.5rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
                min-height: 70vh;
                text-align: center;
            }
            .display-4 {
                font-size: 2.2rem;
            }
            .research-highlight {
                margin-left: 0;
                border-left: none;
                border-top: 4px solid var(--accent-teal);
                border-radius: 8px;
            }
        }