body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; }
        header { background: #FF6B35; color: white; padding: 20px; text-align: center; position: relative; }
        header h1 { margin: 0; font-size: 2.2em; }
        nav { background: #FF8C42; overflow: hidden; }
        nav a { color: white; padding: 14px 16px; text-decoration: none; display: block; }
        .mobile-nav-btn { display: none; cursor: pointer; }
        main { padding: 20px; max-width: 1200px; margin: 0 auto; }
        img { max-width: 100%; height: auto; margin: 15px 0; }
        footer { background: #333; color: white; text-align: center; padding: 15px; }
        .download-btn, .login-btn { background: #FF6B35; color: white; padding: 10px 20px; text-decoration: none; display: inline-block; margin: 10px 0; }
        @media (max-width: 768px) {
            .mobile-nav-btn { display: block; position: absolute; right: 20px; top: 20px; }
            nav { display: none; }
            nav.active { display: block; }
            nav a { padding: 10px; }
        }