:root {
            --primary-blue: #1a73e8;
            --secondary-blue: #4285f4;
            --accent-orange: #ff6d00;
            --water-blue: #4fc3f7;
            --deep-blue: #0277bd;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
            min-height: 100vh;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(45deg, var(--primary-blue), var(--accent-orange));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .nav-link {
            font-weight: 600;
            transition: all 0.3s ease;
            border-radius: 8px;
            margin: 0 5px;
        }
        .nav-link:hover {
            background-color: var(--primary-blue);
            color: white !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--water-blue) 100%);
            color: white;
            padding: 4rem 0;
            border-radius: 0 0 30px 30px;
            margin-bottom: 3rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }
        h1 {
            font-weight: 800;
            font-size: 3rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        h2 {
            color: var(--deep-blue);
            font-weight: 700;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent-orange);
        }
        h3 {
            color: var(--primary-blue);
            font-weight: 600;
            margin: 2rem 0 1rem;
        }
        .content-section {
            background: white;
            border-radius: 20px;
            padding: 3rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            margin-bottom: 3rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e1f5fe 0%, #f3e5f5 100%);
            border-left: 5px solid var(--accent-orange);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .game-feature {
            background: white;
            border-radius: 15px;
            padding: 1.5rem;
            margin: 1rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #e0e0e0;
        }
        .game-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1rem;
        }
        img {
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
            margin: 2rem 0;
            transition: transform 0.3s ease;
            max-width: 100%;
            height: auto;
        }
        img:hover {
            transform: scale(1.02);
        }
        .strategy-card {
            background: linear-gradient(135deg, #bbdefb 0%, #e1f5fe 100%);
            border-radius: 15px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 2px solid var(--secondary-blue);
        }
        footer {
            background: linear-gradient(135deg, var(--deep-blue) 0%, #01579b 100%);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent-orange);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            background: var(--primary-blue);
            color: white;
        }
        .content-highlight {
            font-weight: 700;
            color: var(--primary-blue);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            .content-section {
                padding: 2rem 1.5rem;
            }
            .hero-section {
                padding: 3rem 0;
            }
        }
        .content-paragraph {
            margin-bottom: 1.8rem;
            text-align: justify;
        }
        .keyword-highlight {
            background-color: #fff9c4;
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }