:root {
            --primary-color: #004ba0;
            --secondary-color: #ff6b00;
            --accent-color: #f9a825;
            --text-dark: #2c3e50;
            --text-light: #7f8c8d;
            --bg-light: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #ffffff;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .nav-link {
            font-weight: 600;
            color: var(--text-dark) !important;
            transition: color 0.3s ease;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #00264d 100%);
            color: white;
            padding: 4rem 0;
            margin-bottom: 3rem;
            border-radius: 0 0 20px 20px;
        }
        h1, h2, h3 {
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: white;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--text-dark);
            margin-top: 2.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: rgba(255, 107, 0, 0.1);
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .key-fact {
            background-color: var(--bg-light);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        .key-fact i {
            color: var(--secondary-color);
            margin-right: 10px;
            font-size: 1.5rem;
        }
        .img-container {
            margin: 2.5rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .img-container img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .img-container:hover img {
            transform: scale(1.03);
        }
        .caption {
            font-style: italic;
            color: var(--text-light);
            text-align: center;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .rivalry-card {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-top: 5px solid var(--primary-color);
        }
        .rivalry-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0,0,0,0.15);
        }
        .timeline {
            position: relative;
            margin: 3rem 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 100%;
            background-color: var(--primary-color);
        }
        .timeline-item {
            margin-bottom: 3rem;
            position: relative;
        }
        .timeline-content {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            width: 45%;
        }
        .timeline-item:nth-child(odd) .timeline-content {
            float: left;
        }
        .timeline-item:nth-child(even) .timeline-content {
            float: right;
        }
        .timeline-item::after {
            content: '';
            display: table;
            clear: both;
        }
        .timeline-date {
            font-weight: 700;
            color: var(--secondary-color);
            margin-bottom: 0.5rem;
        }
        footer {
            background-color: var(--text-dark);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-heading {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .social-links a {
            color: white;
            font-size: 1.5rem;
            margin-right: 1rem;
            transition: color 0.3s ease;
        }
        .social-links a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            margin-top: 2rem;
            text-align: center;
            color: rgba(255,255,255,0.7);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .timeline::before {
                left: 30px;
            }
            .timeline-content {
                width: calc(100% - 80px);
                margin-left: 80px;
            }
            .timeline-item:nth-child(odd) .timeline-content,
            .timeline-item:nth-child(even) .timeline-content {
                float: none;
            }
        }
        .table-of-contents {
            background-color: var(--bg-light);
            border-radius: 12px;
            padding: 2rem;
            margin: 2rem 0;
        }
        .toc-heading {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .toc-list {
            list-style-type: none;
            padding-left: 0;
        }
        .toc-list li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .toc-list li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
        }
        .toc-list a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .toc-list a:hover {
            color: var(--primary-color);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 4px 8px rgba(0,0,0,0.08);
            border-top: 4px solid var(--primary-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--text-light);
            font-weight: 600;
        }
        .quote {
            font-style: italic;
            font-size: 1.3rem;
            color: var(--text-dark);
            text-align: center;
            margin: 3rem 0;
            padding: 2rem;
            background-color: rgba(249, 168, 37, 0.1);
            border-radius: 12px;
            position: relative;
        }
        .quote::before, .quote::after {
            content: '"';
            font-size: 4rem;
            color: var(--secondary-color);
            position: absolute;
            opacity: 0.3;
        }
        .quote::before {
            top: 0;
            left: 1rem;
        }
        .quote::after {
            bottom: -2rem;
            right: 1rem;
        }
        .author {
            text-align: right;
            font-weight: 600;
            color: var(--primary-color);
            margin-top: 1rem;
        }