:root {
            --primary-blue: #00539B;
            --secondary-blue: #0077C8;
            --accent-orange: #F26D21;
            --light-blue: #E6F2F8;
            --dark-gray: #333333;
            --medium-gray: #666666;
            --light-gray: #F5F5F5;
            --white: #FFFFFF;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--dark-gray);
            line-height: 1.6;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-blue);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1rem !important;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-orange) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 83, 155, 0.85), rgba(0, 119, 200, 0.8)), url('https://images.unsplash.com/photo-1581338834647-b0fb407c6c67?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: var(--white);
            padding: 8rem 0 6rem;
        }
        .hero-section h1 {
            color: var(--white);
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 30px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background-color: var(--accent-orange);
        }
        .text-center.section-title:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-icon {
            font-size: 2.5rem;
            color: var(--secondary-blue);
            margin-bottom: 1rem;
        }
        .bg-light-custom {
            background-color: var(--light-blue) !important;
        }
        .btn-primary {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
            padding: 0.6rem 1.8rem;
            font-weight: 600;
        }
        .btn-primary:hover {
            background-color: var(--secondary-blue);
            border-color: var(--secondary-blue);
        }
        .btn-outline-primary {
            color: var(--primary-blue);
            border-color: var(--primary-blue);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
        }
        .feature-box {
            padding: 2rem;
            border-radius: 10px;
            background: var(--white);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
            transition: all 0.3s;
        }
        .feature-box:hover {
            background-color: var(--light-blue);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-blue);
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--medium-gray);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        footer {
            background-color: var(--dark-gray);
            color: var(--white);
        }
        footer a {
            color: #cccccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--accent-orange);
        }
        .footer-bottom {
            background-color: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 15px;
            margin: 5px;
            background: rgba(255,255,255,0.1);
            border-radius: 4px;
            color: #ddd;
            transition: all 0.3s;
            text-decoration: none;
        }
        .flink:hover {
            background: var(--accent-orange);
            color: white;
            transform: translateY(-2px);
        }
        .research-highlight {
            border-left: 4px solid var(--accent-orange);
            padding-left: 20px;
            background: rgba(242, 109, 33, 0.05);
            padding-top: 15px;
            padding-bottom: 15px;
            margin-bottom: 20px;
        }
        .publication-item {
            padding: 10px 0;
            border-bottom: 1px solid #eee;
        }
        .publication-item:last-child {
            border-bottom: none;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background-color: var(--secondary-blue);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: var(--accent-orange);
            border: 3px solid var(--white);
            box-shadow: 0 0 0 3px var(--secondary-blue);
        }
        .contact-info-box {
            background: var(--light-blue);
            padding: 25px;
            border-radius: 10px;
            margin-bottom: 30px;
        }
        .contact-icon {
            font-size: 1.8rem;
            color: var(--primary-blue);
            margin-bottom: 15px;
        }
        .mobile-nav-adjust {
            padding-top: 80px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 6rem 0 4rem;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .mobile-nav-adjust {
                padding-top: 60px;
            }
            .stat-number {
                font-size: 2.2rem;
            }
        }