:root {
            --primary-color: #0d3c61;
            --secondary-color: #28a745;
            --accent-color: #ffc107;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .nav-link {
            font-weight: 500;
            color: var(--primary-color) !important;
            margin: 0 8px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(13, 60, 97, 0.85), rgba(13, 60, 97, 0.9)), 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: 120px 0;
        }
        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .section-padding {
            padding: 80px 0;
        }
        .card {
            border: none;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #0a2d4a;
            transform: translateY(-3px);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background-color: #218838;
            transform: translateY(-3px);
        }
        .research-area {
            background-color: var(--light-bg);
            border-radius: 10px;
            padding: 30px;
            height: 100%;
            transition: var(--transition);
        }
        .research-area:hover {
            background-color: white;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 15px;
            border: 5px solid var(--light-bg);
        }
        .publication-item {
            border-left: 4px solid var(--secondary-color);
            padding-left: 20px;
            margin-bottom: 25px;
        }
        .footer {
            background-color: var(--primary-color);
            color: white;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .flink {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            padding: 8px 15px;
            border-radius: 5px;
            margin: 5px;
            transition: var(--transition);
        }
        .flink:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
        }
        .friendlink {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 30px;
            border-radius: 10px;
            margin-top: 40px;
        }
        .contact-info i {
            width: 40px;
            color: var(--secondary-color);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .news-card {
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-body {
            flex-grow: 1;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--secondary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.visible {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-padding {
                padding: 50px 0;
            }
        }