:root {
            --primary-color: #6f42c1;
            --secondary-color: #20c997;
            --accent-color: #fd7e14;
            --dark-color: #2d3748;
            --light-color: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }
        .main-container {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            overflow: hidden;
            margin-top: 20px;
            margin-bottom: 20px;
        }
        .logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .logo:hover {
            transform: scale(1.05);
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            padding: 10px 15px !important;
            border-radius: 8px;
            transition: all 0.3s ease;
            margin: 0 5px;
        }
        .nav-link:hover {
            background-color: var(--primary-color);
            color: white !important;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--dark-color);
            margin-bottom: 1.2rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 10px;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--accent-color);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(111, 66, 193, 0.1);
            padding: 15px;
            border-left: 4px solid var(--primary-color);
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-right: 15px;
            vertical-align: middle;
        }
        .game-image {
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            margin: 20px 0;
            width: 100%;
            height: auto;
        }
        .game-image:hover {
            transform: scale(1.02);
        }
        .table-of-contents {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            color: white;
            border-radius: 12px;
            padding: 25px;
            margin: 30px 0;
        }
        .table-of-contents h3 {
            color: white;
            text-align: center;
            margin-top: 0;
        }
        .table-of-contents ul {
            list-style-type: none;
            padding-left: 0;
        }
        .table-of-contents li {
            margin-bottom: 10px;
            padding: 8px 15px;
            background: rgba(255,255,255,0.2);
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        .table-of-contents li:hover {
            background: rgba(255,255,255,0.3);
            transform: translateX(5px);
        }
        .table-of-contents a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
        }
        .key-feature {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 20px;
            transition: all 0.3s ease;
            border-top: 4px solid var(--secondary-color);
        }
        .key-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        footer {
            background: var(--dark-color);
            color: white;
            padding: 30px 0;
            margin-top: 50px;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .logo {
                font-size: 1.8rem;
            }
            .nav-link {
                padding: 8px 12px !important;
                margin: 2px 0;
            }
        }