In Candide, what is it about Voltaire's critique that qualifies it as "enlightened"?

When we speak about the intellectual and literary trends of the eighteenth century, we largely speak in terms of the Enlightenment, or the Age of Reason (in which Voltaire is usually featured prominently). The Enlightenment was characterized by a mindset championing rationalism and human progress. It attacked superstitions and irrationalities present within Early Modern Europe. This is the source of its moniker the "Age of Reason": one might understand the Enlightenment as being shaped by a vision in which social and political progress could only be achieved through the use of the intellect.
Where things get trickier, however, is this: while we have a tendency to view the Enlightenment in terms of a unified movement, it was, in reality, far more fractal in nature. Enlightenment thinkers were not in lockstep with each other. There was no unified doctrine tying it all together. Indeed, consider that, with its representation of Pangloss on one side and Martin on the other, Candide seems to lampoon the very notion of abstract philosophy altogether. It is worth asking if this attitude might be in tension with the philosophical inquiries of a David Hume (even if they were both defenders of empiricism and of science, one can just imagine Voltaire scoffing at something like Hume's Problem of Induction) or of an Immanuel Kant.
That being said, I think Voltaire's Enlightenment credentials are quite clear. Candide is an attack on the irrationalities of Early Modern Society and also on the irrationalities of religion. Moreover, throughout Candide, there is a far deeper (and more subversive) criticism of traditional Christianity than can be found even in his attacks against the Church. Voltaire was a deist, and in this he broke with the most fundamental assumptions that define Christianity altogether: Christianity states that God is good and personally active within the world. If one looks across the entire arc of Candide, and all of Candide's miseries and sufferings, one will observe that Voltaire is very much concerned with the Problem of Evil: how can God possibly be good if there is so much evil and suffering present in the world? Voltaire's answer to this quandary was to reject the traditional Christian picture of the cosmos for a deistic vision in which the universe was created, but its Creator would play no part after setting things in motion. This notion was quite popular among Enlightenment-era intellectuals, and Voltaire was one of its adherents.
Candide is a work of satire, raging against the hypocrisies and absurdities of Early Modern Europe. There is a deep pessimism at its core, but even so, one can hopefully see the ways in which it reflects the larger currents of what one might call the Enlightenment to see why Voltaire is often counted among the most famous champions of the Age of Reason.