Reply To: input field id keeps changing, how do i target it

thanks but i should have been more specific. primarily needing responsive width and height per separate instances of the widget in separate forms on the same site.

i.e., quforms on two pages, one page is full width and another is two column. while the quforms on those pages are responsive, the calendar is always the same relative size and in the same relative position. how do i adjust each one’s width, height, position and responsiveness?