:root {
            --primary-emerald: #10b981;
            --secondary-gold: #f59e0b;
            --accent-purple: #8b5cf6;
            --dark-bg: #1f2937;
            --light-text: #f8fafc;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: var(--light-text);
            line-height: 1.7;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(45deg, var(--primary-emerald), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .nav-link {
            color: var(--light-text) !important;
            font-weight: 500;
            transition: all 0.3s ease;
            border-radius: 8px;
            margin: 0 5px;
        }
        .nav-link:hover {
            background: rgba(16, 185, 129, 0.2);
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(15, 23, 42, 0.9), rgba(30, 41, 59, 0.9)), 
                        url('https://via.placeholder.com/1200x600') center/cover;
            padding: 100px 0;
            border-radius: 0 0 30px 30px;
            margin-bottom: 50px;
        }
        .content-section {
            background: rgba(30, 41, 59, 0.8);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 30px;
            border: 1px solid rgba(255,255,255,0.1);
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        h1, h2, h3 {
            color: var(--primary-emerald);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            font-size: 3rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--secondary-gold);
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-gold);
        }
        .key-feature {
            background: linear-gradient(45deg, rgba(16, 185, 129, 0.1), rgba(139, 92, 246, 0.1));
            border-radius: 15px;
            padding: 25px;
            margin: 20px 0;
            border: 1px solid rgba(16, 185, 129, 0.3);
        }
        .game-image {
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.5);
            transition: transform 0.3s ease;
            margin: 25px 0;
        }
        .game-image:hover {
            transform: scale(1.02);
        }
        .highlight-text {
            background: linear-gradient(45deg, var(--primary-emerald), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 700;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--secondary-gold);
            margin-bottom: 15px;
        }
        .table-of-contents {
            background: rgba(15, 23, 42, 0.8);
            border-radius: 15px;
            padding: 30px;
            margin: 30px 0;
            border: 2px solid var(--primary-emerald);
        }
        .toc-item {
            padding: 12px 20px;
            margin: 8px 0;
            background: rgba(255,255,255,0.05);
            border-radius: 10px;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .toc-item:hover {
            background: rgba(16, 185, 129, 0.2);
            transform: translateX(10px);
        }
        footer {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-top: 3px solid var(--primary-emerald);
            margin-top: 50px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 25px;
            }
        }