So you can tweak the positional difference between the placeholder text and value simply by tweaking the padding or line-height using that pseudo-element selector: input[type=text] { padding:4px; } input[type=text]::-webkit-input-placeholder { padding-top:5px; } Or whatever.
Identifying and describing action-reaction force pairs is a simple matter of identifying the two interacting objects and making two statements describing who is pushing on whom and in what direction. For example, consider the interaction between a baseball bat and a baseball.
Unbalanced forces result in a net force and cause an object to move in the direction of the greater force. Finally, imagine the two friends pushing the box in the same direction. The combined forces cause the box to move in the direction they are both pushing.