:root {
            --primary-dark: #1a1a2e;
            --secondary-dark: #16213e;
            --accent-color: #e94560;
            --text-light: #f0f0f0;
            --text-muted: #b8b8b8;
        }
        body {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
            color: var(--text-light);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
        }
        .navbar-brand {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-color) !important;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
        }
        .nav-link {
            color: var(--text-light) !important;
            font-weight: 500;
            transition: all 0.3s ease;
            margin: 0 10px;
        }
        .nav-link:hover {
            color: var(--accent-color) !important;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            font-size: 3rem;
            text-align: center;
            margin: 2rem 0;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        h2 {
            font-size: 2.2rem;
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: var(--text-light);
        }
        .content-section {
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 2.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 8px 32px rgba(0,0,0,0.2);
            border: 1px solid rgba(255,255,255,0.1);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight {
            background: rgba(233, 69, 96, 0.2);
            border-left: 4px solid var(--accent-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .game-feature {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        .game-feature i {
            color: var(--accent-color);
            margin-right: 15px;
            font-size: 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            margin: 1.5rem 0;
            transition: transform 0.3s ease;
        }
        img:hover {
            transform: scale(1.02);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-muted);
            margin-top: -0.5rem;
            margin-bottom: 2rem;
        }
        .key-term {
            font-weight: bold;
            color: var(--accent-color);
        }
        .table-of-contents {
            background: rgba(255,255,255,0.08);
            border-radius: 10px;
            padding: 1.5rem;
            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: "▶";
            color: var(--accent-color);
            position: absolute;
            left: 0;
        }
        .toc-list a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .toc-list a:hover {
            color: var(--accent-color);
        }
        footer {
            background: rgba(0,0,0,0.3);
            padding: 2rem 0;
            margin-top: 3rem;
            text-align: center;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: var(--accent-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(0,0,0,0.3);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            color: white;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }