body { font-family: 'Arial', sans-serif; line-height: 1.6; margin: 0; padding: 0; color: #333; background: #f9f9f9; }
        header { background: #0066cc; color: white; padding: 1rem; text-align: center; position: relative; }
        .logo { font-size: 2rem; font-weight: bold; text-transform: uppercase; letter-spacing: 2px; }
        nav { display: flex; justify-content: center; gap: 1.5rem; margin-top: 1rem; }
        nav a { color: white; text-decoration: none; }
        .mobile-nav-toggle { display: none; position: absolute; top: 1rem; right: 1rem; cursor: pointer; }
        @media (max-width: 768px) {
            .mobile-nav-toggle { display: block; }
            nav { display: none; flex-direction: column; position: absolute; top: 4rem; right: 1rem; background: #0066cc; padding: 1rem; }
            nav.active { display: flex; }
        }
        main { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
        h1, h2, h3 { color: #0066cc; margin-top: 1.5rem; }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.5rem; }
        .download-btn, .login-btn { display: inline-block; padding: 0.8rem 1.5rem; background: #00cc66; color: white; text-decoration: none; border-radius: 5px; margin: 1rem 0; }
        .download-btn:hover, .login-btn:hover { background: #00994d; }
        figure { margin: 2rem 0; text-align: center; }
        img { max-width: 100%; height: auto; }
        footer { background: #333; color: white; text-align: center; padding: 1.5rem; margin-top: 2rem; }
        .tags { margin: 1.5rem 0; }
        .tag { display: inline-block; background: #666; color: white; padding: 0.3rem 0.8rem; margin: 0.2rem; border-radius: 3px; }