:root {
            --primary-color: #ff6b35;
            --secondary-color: #004e64;
            --accent-color: #00a5cf;
            --text-color: #333333;
            --light-bg: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #ffffff;
        }
        .logo-text {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .logo-text:hover {
            transform: scale(1.05);
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--text-color) !important;
            transition: color 0.3s ease;
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        h1, h2, h3 {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            padding-left: 1rem;
            border-left: 4px solid var(--accent-color);
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: var(--primary-color);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight-box {
            background-color: var(--light-bg);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .key-point {
            font-weight: bold;
            color: var(--secondary-color);
        }
        .game-feature {
            background: linear-gradient(135deg, #ff6b35 0%, #ff8e53 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
            transition: transform 0.3s ease;
        }
        .game-feature:hover {
            transform: translateY(-5px);
        }
        .image-container {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .image-container img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .image-container:hover img {
            transform: scale(1.03);
        }
        .image-caption {
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 0.8rem;
            text-align: center;
            font-style: italic;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .table-of-contents {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .toc-list {
            list-style-type: none;
            padding-left: 0;
        }
        .toc-list li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .toc-list li::before {
            content: "▶";
            position: absolute;
            left: 0;
            color: var(--primary-color);
        }
        .toc-list a {
            color: var(--text-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .toc-list a:hover {
            color: var(--primary-color);
        }
        footer {
            background-color: var(--secondary-color);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            background-color: var(--accent-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .logo-text {
                font-size: 1.8rem;
            }
        }