:root {
            --primary-color: #ff6b35;
            --secondary-color: #f7931e;
            --accent-color: #ffd166;
            --dark-color: #2d3047;
            --light-color: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }
        .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(rgba(45, 48, 71, 0.8), rgba(255, 107, 53, 0.7)), url('https://via.placeholder.com/1600x900') center/cover no-repeat;
            color: white;
            padding: 5rem 0;
            margin-bottom: 3rem;
            border-radius: 0 0 30px 30px;
        }
        h1, h2, h3 {
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--dark-color);
        }
        h1 {
            font-size: 3rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-top: 2rem;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 3rem;
            margin-bottom: 3rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
            color: var(--dark-color);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .game-feature {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 2rem;
        }
        .game-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .img-fluid {
            border-radius: 10px;
            transition: transform 0.5s ease;
        }
        .img-fluid:hover {
            transform: scale(1.03);
        }
        .nav-pills .nav-link.active {
            background-color: var(--primary-color);
            font-weight: 600;
        }
        .nav-pills .nav-link {
            color: var(--dark-color);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .copyright {
            background-color: rgba(0,0,0,0.2);
            padding: 1rem 0;
            margin-top: 2rem;
        }
        .key-term {
            font-weight: 700;
            color: var(--primary-color);
        }
        .quote-box {
            border-left: 4px solid var(--accent-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .hero-section {
                padding: 3rem 0;
            }
        }