colloquio telefonico con HR con domande generali sulla persona; secondo colloquio più specifico con manager dell'area di riferimento con domande più specifiche e personali su esperienze passate e attitudine al lavoro

It was casual, sometimes professional. The person who would want to hiring is clear, everything looks okay during interview. Be prepared for unexpectedness. Depending who is the person, the background and experience. Speaking to different people in office gives you a better idea how is the company like.