I agree this site is one to which I contribute
I think it is Idaea seriata
Both Ii. contiguaria and seriata are variable, but one can find aspects that are fairly reliable discriminators.
On I. contiguaria, the forewing discal spot is just on the outside of the line;
on I. seriata, it is on the inside - like your specimen.
Other aspects of the pattern (eg. the absence of the three dark marks on the leading edge of the forewing) are also a better match with I. seriata.
I. albitorquata is rather like I. seriata (and all three species occur in Italy)
But, IMO, the markings do not fit as well as I. seriata.