Learn Italian: Il bello che vedo in questo stile è il contrasto. - The beauty that I see in this style is the contrast.

In Italian, you can create an abstract noun by putting the masculine singular article il before an adjective. While la bellezza means "beauty" in a general sense, il bello translates closer to "the beautiful thing" or "the beautiful part." Here, it highlights a specific beautiful aspect of the style rather than the broad concept of beauty.

Is this grammar pattern unique to bello?

Not at all! This is a very common pattern. You can take almost any masculine singular adjective and add il to mean "the [adjective] thing" or "what is [adjective]." Other common examples you'll hear are il nuovo (the new part/what is new), il peggio (the worst part), or l'importante (the important thing).

Could I use cui instead of che for "that" in this sentence?

No. You use che when "that" or "which" is the subject or direct object of the verb—here, it's the direct object ("the beautiful thing that I see"). You only use cui when there is a preposition involved, like di cui (of which) or in cui (in which).

Since stile takes the article lo (lo stile), why is it questo stile?