body { font-family: 'Segoe UI', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF6B35; text-align: center; }
        h2 { color: #4A90E2; border-bottom: 2px solid #FFD700; padding-bottom: 5px; }
        h3 { color: #2ECC71; }
        .logo { font-size: 28px; font-weight: bold; color: #FF4500; text-shadow: 1px 1px 2px #ccc; }
        .nav { background: #f8f8f8; padding: 10px; position: sticky; top: 0; }
        .mobile-nav-btn { display: none; }
        .download-btn, .login-btn { background: #FF6B35; color: white; padding: 10px 15px; margin: 10px 0; display: inline-block; }
        img { max-width: 100%; height: auto; margin: 15px 0; }
        @media (max-width: 768px) {
            .mobile-nav-btn { display: block; }
            .nav-links { display: none; }
        }