:root {
            --marsi-primary: #0a3d62;
            --marsi-secondary: #1e90ff;
            --marsi-accent: #ff9f43;
            --marsi-light: #f8f9fa;
            --marsi-dark: #222f3e;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--marsi-primary) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--marsi-secondary) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(10, 61, 98, 0.9) 0%, rgba(30, 144, 255, 0.8) 100%), url('https://images.unsplash.com/photo-1516321497487-e288fb19713f?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;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.4);
            margin-bottom: 1.5rem;
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.5rem; }
        }
        .section-title {
            color: var(--marsi-primary);
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 3rem;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: var(--marsi-accent);
            border-radius: 2px;
        }
        .card-hover {
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-12px);
            box-shadow: 0 20px 30px rgba(10, 61, 98, 0.15) !important;
        }
        .card-icon {
            font-size: 2.5rem;
            color: var(--marsi-secondary);
            margin-bottom: 1.5rem;
        }
        .btn-marsi {
            background-color: var(--marsi-secondary);
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            transition: all 0.3s ease;
        }
        .btn-marsi:hover {
            background-color: var(--marsi-primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(30, 144, 255, 0.3);
        }
        .publication-item {
            border-left: 4px solid var(--marsi-secondary);
            padding-left: 1.5rem;
            margin-bottom: 2rem;
            transition: border-color 0.3s ease;
        }
        .publication-item:hover {
            border-left-color: var(--marsi-accent);
        }
        .timeline-item {
            position: relative;
            padding-left: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--marsi-accent);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--marsi-accent);
        }
        .flink {
            display: inline-block;
            background-color: var(--marsi-light);
            color: var(--marsi-dark);
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            text-decoration: none;
            margin: 0.5rem;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background-color: var(--marsi-secondary);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        footer {
            background-color: var(--marsi-dark);
            color: #ddd;
        }
        footer a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: var(--marsi-secondary);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--marsi-secondary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.show {
            opacity: 1;
        }
        .member-card {
            text-align: center;
            padding: 2rem 1.5rem;
            border-radius: 12px;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        .member-card:hover {
            box-shadow: 0 15px 30px rgba(30, 144, 255, 0.1);
        }
        .member-img {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid #f1f8ff;
            margin-bottom: 1.5rem;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--marsi-primary);
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .research-area {
            background: linear-gradient(145deg, #ffffff, #f0f8ff);
            border-radius: 12px;
            padding: 2rem;
            height: 100%;
            border-left: 5px solid var(--marsi-secondary);
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(30, 144, 255, 0.1);
            color: var(--marsi-primary);
            font-weight: 600;
        }
        .news-card {
            border-radius: 10px;
            overflow: hidden;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }
        .news-card:hover {
            transform: translateY(-5px);
        }
        .news-date {
            position: absolute;
            top: 15px;
            left: 15px;
            background-color: var(--marsi-secondary);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
        }