:root {
            --primary-color: #ff6b35;
            --secondary-color: #1a237e;
            --accent-color: #ffd54f;
            --text-dark: #2e2e2e;
            --text-light: #f8f9fa;
            --bg-light: #ffffff;
            --bg-dark: #121212;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
        }
        .logo-text {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
        }
        .logo-text:hover {
            color: var(--accent-color);
            transform: scale(1.05);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
            color: var(--text-light);
            padding: 4rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 20px 20px;
        }
        .section-title {
            color: var(--secondary-color);
            border-left: 5px solid var(--primary-color);
            padding-left: 15px;
            margin: 2rem 0 1.5rem 0;
            font-weight: 700;
        }
        .subsection-title {
            color: var(--primary-color);
            margin: 1.5rem 0 1rem 0;
            font-weight: 600;
        }
        .content-card {
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
        }
        .key-term {
            font-weight: bold;
            color: var(--primary-color);
        }
        .game-feature {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-left: 4px solid var(--accent-color);
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 0 8px 8px 0;
        }
        .nav-link {
            font-weight: 500;
            color: var(--text-dark);
            transition: color 0.3s ease;
        }
        .nav-link:hover {
            color: var(--primary-color);
        }
        .footer {
            background-color: var(--secondary-color);
            color: var(--text-light);
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .img-container {
            overflow: hidden;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .img-container img {
            transition: transform 0.5s ease;
            width: 100%;
            height: auto;
        }
        .img-container:hover img {
            transform: scale(1.03);
        }
        .highlight-box {
            background: linear-gradient(135deg, var(--accent-color) 0%, #ffecb3 100%);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-left: 5px solid var(--primary-color);
        }
        @media (max-width: 768px) {
            .logo-text {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 2.5rem 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }
        .table-of-contents {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
        .toc-list {
            list-style-type: none;
            padding-left: 0;
        }
        .toc-list li {
            margin-bottom: 0.5rem;
            padding-left: 1rem;
            position: relative;
        }
        .toc-list li:before {
            content: "▸";
            color: var(--primary-color);
            position: absolute;
            left: 0;
        }
        .toc-list a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .toc-list a:hover {
            color: var(--primary-color);
        }