body { font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; }
        .header { background: linear-gradient(135deg, #FF9933, #138808); color: white; padding: 15px; text-align: center; }
        .logo { font-size: 28px; font-weight: bold; letter-spacing: 2px; }
        .nav { display: flex; justify-content: center; gap: 20px; margin-top: 10px; }
        .nav a { color: white; text-decoration: none; }
        .mobile-nav-btn { display: none; position: absolute; top: 15px; right: 15px; }
        .content { max-width: 1000px; margin: 20px auto; padding: 0 15px; }
        .download-btn { display: block; background: #FF9933; color: white; padding: 12px 25px; text-align: center; margin: 20px 0; border-radius: 5px; text-decoration: none; }
        .login-btn { display: block; background: #138808; color: white; padding: 12px 25px; text-align: center; margin: 20px 0; border-radius: 5px; text-decoration: none; }
        .image-container { text-align: center; margin: 25px 0; }
        .footer { background: #222; color: white; text-align: center; padding: 20px; margin-top: 30px; }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; }
            .nav.active { display: flex; }
            .mobile-nav-btn { display: block; }
        }