:root {
            --primary-blue: #003366;
            --secondary-blue: #0066cc;
            --accent-gold: #d4af37;
            --light-gray: #f8f9fa;
            --dark-gray: #343a40;
            --transition-speed: 0.3s;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-blue);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1rem !important;
            transition: color var(--transition-speed);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-blue) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(0, 102, 204, 0.8)), url('https://images.unsplash.com/photo-1517077304055-6e89abbf09b0?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .section-padding {
            padding: 5rem 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--accent-gold);
        }
        .section-title.center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: transform var(--transition-speed), box-shadow var(--transition-speed);
            height: 100%;
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .icon-container {
            width: 70px;
            height: 70px;
            background: var(--primary-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .bg-light-blue {
            background-color: #e6f2ff;
        }
        .btn-primary {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 5px;
            transition: all var(--transition-speed);
        }
        .btn-primary:hover {
            background-color: var(--secondary-blue);
            border-color: var(--secondary-blue);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,102,204,0.3);
        }
        .btn-outline-primary {
            color: var(--primary-blue);
            border-color: var(--primary-blue);
            font-weight: 600;
            padding: 0.75rem 2rem;
            border-radius: 5px;
            transition: all var(--transition-speed);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-blue);
            color: white;
            transform: translateY(-2px);
        }
        .research-card {
            border-left: 4px solid var(--secondary-blue);
            padding-left: 1.5rem;
            margin-bottom: 2rem;
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--secondary-blue);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -2.35rem;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-gold);
            border: 3px solid var(--primary-blue);
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1rem;
            margin: 0.25rem;
            background: var(--light-gray);
            border-radius: 5px;
            color: var(--dark-gray);
            text-decoration: none;
            font-weight: 500;
            transition: all var(--transition-speed);
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-blue);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        footer {
            background: var(--dark-gray);
            color: white;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-bottom {
            background: #212529;
            padding: 1.5rem 0;
            font-size: 0.9rem;
        }
        .contact-info i {
            width: 30px;
            color: var(--secondary-blue);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-blue);
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--dark-gray);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .img-hover-zoom {
            overflow: hidden;
            border-radius: 8px;
        }
        .img-hover-zoom img {
            transition: transform 0.5s ease;
        }
        .img-hover-zoom:hover img {
            transform: scale(1.05);
        }
        .publication-item {
            padding: 1rem;
            border-bottom: 1px solid #eee;
            transition: background-color var(--transition-speed);
        }
        .publication-item:hover {
            background-color: #f8f9fa;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition-speed);
            z-index: 1000;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-blue);
            transform: translateY(-3px);
        }
        .research-area {
            transition: all var(--transition-speed);
            padding: 1.5rem;
            border-radius: 8px;
            height: 100%;
            background: white;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .research-area:hover {
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transform: translateY(-5px);
        }
        .partner-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all var(--transition-speed);
            padding: 1rem;
        }
        .partner-logo:hover {
            filter: grayscale(0%);
            opacity: 1;
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(0, 102, 204, 0.1);
            color: var(--primary-blue);
            font-weight: 600;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 0.25rem rgba(0, 102, 204, 0.25);
        }