:root {
            --primary-color: #1e40af;
            --secondary-color: #dc2626;
            --accent-color: #f59e0b;
            --text-color: #1f2937;
            --light-bg: #f8fafc;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color), #1e3a8a);
            color: white;
            padding: 4rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 20px 20px;
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--accent-color);
            padding-left: 1rem;
            margin: 2rem 0 1.5rem;
        }
        .content-card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            padding: 2rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        }
        .key-term {
            background-color: #eff6ff;
            border-left: 4px solid var(--primary-color);
            padding: 0.75rem 1rem;
            margin: 1rem 0;
            font-weight: 600;
        }
        .game-feature {
            background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
        .img-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            margin: 2rem 0;
        }
        .highlight-text {
            color: var(--secondary-color);
            font-weight: 700;
        }
        .strategy-box {
            background-color: #fef3c7;
            border: 2px dashed var(--accent-color);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .nav-link {
            transition: color 0.3s ease;
        }
        .nav-link:hover {
            color: var(--accent-color) !important;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 2.5rem 0;
            }
            .content-card {
                padding: 1.5rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }