:root {
            --primary-color: #8e44ad;
            --secondary-color: #f39c12;
            --accent-color: #e74c3c;
            --text-dark: #2c3e50;
            --text-light: #7f8c8d;
            --bg-light: #ecf0f1;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        .main-container {
            background: white;
            border-radius: 15px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
            overflow: hidden;
            margin-top: 20px;
            margin-bottom: 20px;
        }
        .logo {
            font-family: 'Georgia', serif;
            font-weight: bold;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            font-size: 2.2rem;
        }
        .nav-link {
            font-weight: 500;
            transition: all 0.3s ease;
            color: var(--text-dark) !important;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            font-weight: 700;
        }
        h1 {
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.5rem;
            font-size: 2.5rem;
        }
        h2 {
            border-left: 5px solid var(--accent-color);
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            color: var(--secondary-color);
            margin-top: 1.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, #f6d365 0%, #fda085 100%);
            padding: 15px;
            border-radius: 10px;
            border-left: 4px solid var(--accent-color);
            margin: 20px 0;
        }
        .game-feature {
            background: var(--bg-light);
            padding: 20px;
            border-radius: 10px;
            margin: 15px 0;
            transition: transform 0.3s ease;
        }
        .game-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 10px;
        }
        img {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            max-width: 100%;
            height: auto;
        }
        img:hover {
            transform: scale(1.02);
        }
        .content-section {
            padding: 30px;
        }
        .table-of-contents {
            background: var(--bg-light);
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 30px;
        }
        .table-of-contents ul {
            list-style-type: none;
            padding-left: 0;
        }
        .table-of-contents li {
            margin-bottom: 10px;
            padding-left: 15px;
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
        }
        .table-of-contents li:hover {
            border-left-color: var(--primary-color);
            padding-left: 20px;
        }
        .table-of-contents a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
        }
        .table-of-contents a:hover {
            color: var(--primary-color);
        }
        footer {
            background: var(--text-dark);
            color: white;
            padding: 30px 0;
            margin-top: 50px;
        }
        .keyword-highlight {
            font-weight: bold;
            color: var(--primary-color);
            background-color: rgba(142, 68, 173, 0.1);
            padding: 2px 5px;
            border-radius: 3px;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            .logo {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 20px;
            }
        }