Of course it is very sad to see Atalanta have to bow down to Club Brugge because statistically the Italian representative should have been able to win the match. Yes, this is the Champions League, especially with a new format so it is not easy for anyone to analyze every match played. But even though they lost, I still hope Atalanta can advance to the next round.
Losing one goal at Club Brugge's home is not difficult enough for Atalanta to be able to make a comeback in the second leg because the second leg took place at Atalanta's home ground itself. I am also quite sure that Atalanta can reply and become a team that can qualify for the next round in the Champions League this season because Atalanta has had quite good abilities in undergoing every competition this season. In addition, Atalanta is a team that always wants to improve from the mistakes they have made before so it is very possible that Atalanta will make a comeback in the second leg in the Champions League play-offs.
I totally agree with what you said that the second leg Atalanta will play as well as possible in front of their supporters, a narrow defeat is very vulnerable to a comeback so I think Atalanta is not too burdened by their defeat at Club Brugge's home, indeed no one expected it but this is the final decision that Atalanta must accept with a penalty goal from the white spot, Atalanta must stay focused on the next match so that they can turn things around in the next leg.