body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; }
        .header { background-color: #FF6B35; color: white; padding: 15px; text-align: center; position: relative; }
        .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-toggle { display: none; position: absolute; top: 15px; right: 15px; }
        .content { max-width: 1200px; margin: 20px auto; padding: 0 15px; }
        .download-btn, .login-btn { background-color: #4CAF50; color: white; padding: 10px 20px; margin: 10px 0; display: inline-block; border-radius: 5px; text-decoration: none; }
        .login-btn { background-color: #2196F3; }
        .image-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; }
        .footer { background-color: #333; color: white; text-align: center; padding: 15px; margin-top: 30px; }
        h1 { color: #FF6B35; border-bottom: 3px solid #FF6B35; padding-bottom: 10px; }
        h2 { color: #4CAF50; margin-top: 30px; }
        h3 { color: #2196F3; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; align-items: center; display: none; }
            .nav.active { display: flex; }
            .mobile-nav-toggle { display: block; }
            .content { padding: 0 10px; }
        }