Learn Italian: In passato la moda ispirava il bello, oggi ispira il provocatorio. - In the past, fashion inspired the beautiful; today it inspires the provocative.

By placing the masculine singular definite article (il) in front of an adjective (bello, provocatorio), you turn it into an abstract noun meaning "that which is beautiful" or "the concept of the provocative." While you could use regular nouns here, using these "substantivized adjectives" is a very common stylistic choice in Italian, especially when talking about aesthetics, art, or philosophy.

Why use the imperfect tense ispirava instead of the passato prossimo (ha ispirato)?

The imperfect tense is used here because it describes a broad, ongoing state or a general habit in the past. It sets a continuous backdrop ("back in the past, fashion used to inspire...") which sets up a direct contrast with what fashion generally does today (oggi ispira).

Why is there an article before moda (la moda) when the English translation just says "fashion"?

In Italian, you almost always need a definite article when talking about abstract concepts or speaking about a category as a whole. Since the sentence refers to "fashion" in the broadest, most general sense, it requires the article la.

Could I say nel passato instead of in passato here?