Did you use the top, right, bottom and left properties to stretch elements over the full width and height of the parent?
Reduce top: 0; right: 0; bottom: 0; left: 0 to one line!
Reduce top: 0; right: 0; bottom: 0; left: 0…
Reduce top: 0; right: 0; bottom: 0; left: 0 to one line!
Did you use the top, right, bottom and left properties to stretch elements over the full width and height of the parent?