If someone hugged a girl is that zina?

It is not the zina that necessitates punishment.

But it is zina of the touch, as the prophet said.

Allah has written upon Adam, the son of Adam, his share of zina.

So zina of the eyes is the look, zina of the hands, is the touch.

zina of the feet is walking to zina, of the ear is listening to the haram, right?

So you should be very, very careful and you should fear Allah about yourself and fear Allah about other people's daughters.