:root {
            --primary-color: #ff6b35;
            --secondary-color: #f7931e;
            --accent-color: #2ecc71;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }
        .logo-text {
            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-custom {
            background: linear-gradient(90deg, var(--dark-color) 0%, #34495e 100%);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .nav-link {
            color: var(--light-color) !important;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 0.5rem 1rem !important;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.9)), url('https://via.placeholder.com/1600x900') center/cover no-repeat;
            color: white;
            padding: 5rem 0;
            margin-bottom: 3rem;
            border-radius: 0 0 30px 30px;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            padding: 2.5rem;
            margin-bottom: 2rem;
        }
        h1, h2, h3 {
            color: var(--dark-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
        }
        h2 {
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            color: var(--secondary-color);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 107, 53, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .keyword {
            font-weight: bold;
            color: var(--primary-color);
        }
        .game-feature {
            background: var(--light-color);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1rem 0;
            transition: all 0.3s ease;
            border-left: 4px solid var(--accent-color);
        }
        .game-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .img-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            margin: 2rem 0;
            transition: all 0.3s ease;
        }
        .img-container:hover {
            transform: scale(1.02);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
        }
        footer {
            background: var(--dark-color);
            color: var(--light-color);
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .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;
            box-shadow: 0 4px 10px 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);
        }
        .timeline-item {
            position: relative;
            padding-left: 30px;
            margin-bottom: 2rem;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--secondary-color);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 3rem 0;
                border-radius: 0 0 20px 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            .content-section {
                padding: 1.5rem;
            }
        }