Translation of "Casually" in Spanish

Tom casually shrugged.

Tom casualmente se encogió de hombros.

That are casually dismissed as "women's illnesses."

que se descartan a la ligera como “enfermedades de la mujer”.

As casually as some of you may think about the weather.

con la misma facilidad con la que Uds. pueden pensar en el tiempo.