:root {
            --primary-color: #ff6b35;
            --secondary-color: #f7931e;
            --accent-color: #2ecc71;
            --text-dark: #2c3e50;
            --text-light: #7f8c8d;
            --bg-light: #f8f9fa;
        }
        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-text {
            font-family: 'Georgia', serif;
            font-weight: bold;
            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-dark) !important;
            transition: all 0.3s ease;
            border-bottom: 2px solid transparent;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
            border-bottom: 2px solid var(--primary-color);
        }
        h1, h2, h3 {
            color: var(--text-dark);
            margin-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 15px;
            margin-top: 2rem;
        }
        h2 {
            font-size: 2.2rem;
            border-bottom: 2px solid var(--secondary-color);
            padding-bottom: 10px;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-top: 2.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 25px;
            border-radius: 10px;
            margin: 25px 0;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .game-feature {
            background: var(--bg-light);
            border-left: 4px solid var(--accent-color);
            padding: 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .img-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            margin: 25px 0;
            transition: transform 0.3s ease;
        }
        .img-container:hover {
            transform: translateY(-5px);
        }
        .cultural-note {
            background: #e8f4fc;
            border: 1px solid #3498db;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        footer {
            background: var(--text-dark);
            color: white;
            padding: 30px 0;
            margin-top: 50px;
        }
        .keyword-highlight {
            background: linear-gradient(120deg, transparent 0%, #ffeb3b 50%, transparent 100%);
            padding: 0 5px;
            font-weight: bold;
        }
        @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; }
        }
        .table-of-contents {
            background: var(--bg-light);
            border-radius: 10px;
            padding: 25px;
            margin: 25px 0;
        }
        .toc-item {
            padding: 8px 0;
            border-bottom: 1px dashed #ddd;
        }
        .toc-item:last-child {
            border-bottom: none;
        }
        .icon-bullet {
            color: var(--primary-color);
            margin-right: 10px;
        }