non avevo idea che lei fosse così

I had no idea she was so...

→ non
phrase Rare #46,795
I had no idea she was so... The phrase is usually followed by an adjective describing her.
IT: Non avevo idea che lei fosse così gentile.
EN: I had no idea she was so kind.

Non avevo idea che lei fosse così stupido.

I had no idea she was that stupid.

Io non avevo idea che lei fosse così stupido.

I had no idea you were that stupid.

Non avevo idea che lei fosse così stupida.

I had no idea she was that stupid.

Io non avevo idea che lei fosse così stupida.

I had no idea she was that stupid.