:root {
            --primary-blue: #1a5276;
            --secondary-teal: #17a2b8;
            --accent-gold: #ffd700;
            --deep-ocean: #0d3b66;
            --coral: #ff6b6b;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #e6f7ff 0%, #ffffff 100%);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(45deg, var(--primary-blue), var(--secondary-teal));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .hero-section {
            background: linear-gradient(rgba(13, 59, 102, 0.8), rgba(26, 82, 118, 0.9)), url('https://via.placeholder.com/1600x900') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
            margin-bottom: 40px;
        }
        .section-title {
            color: var(--primary-blue);
            border-left: 5px solid var(--accent-gold);
            padding-left: 15px;
            margin: 40px 0 25px;
            font-weight: 700;
        }
        .content-card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 30px;
            margin-bottom: 30px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-top: 4px solid var(--secondary-teal);
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.12);
        }
        .key-feature {
            background: linear-gradient(135deg, var(--primary-blue), var(--deep-ocean));
            color: white;
            border-radius: 10px;
            padding: 25px;
            margin: 20px 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .highlight-text {
            background: linear-gradient(120deg, var(--accent-gold) 0%, var(--accent-gold) 100%);
            background-repeat: no-repeat;
            background-size: 100% 40%;
            background-position: 0 90%;
            font-weight: 700;
            padding: 0 5px;
        }
        .game-image {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            margin: 25px 0;
            transition: transform 0.4s ease;
        }
        .game-image:hover {
            transform: scale(1.02);
        }
        .nav-pills .nav-link.active {
            background: linear-gradient(45deg, var(--primary-blue), var(--secondary-teal));
            font-weight: 600;
        }
        .nav-pills .nav-link {
            color: var(--primary-blue);
            font-weight: 500;
        }
        footer {
            background: linear-gradient(135deg, var(--deep-ocean), var(--primary-blue));
            color: white;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--accent-gold);
            margin-bottom: 15px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }
            .content-card {
                padding: 20px;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        .content-paragraph {
            margin-bottom: 25px;
            text-align: justify;
        }
        .table-of-contents {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            margin: 30px 0;
            border-left: 4px solid var(--secondary-teal);
        }
        .toc-item {
            padding: 8px 0;
            border-bottom: 1px dashed #dee2e6;
        }
        .toc-item:last-child {
            border-bottom: none;
        }