as done in T238558 it would be wise to introduce hover states on wp.de aswell
- hover state for the X: 75% black
- hover states for the respective flat buttons:
- gray one: background-color: #d7d7d7; border-color: #848484;
- primary blue one ("Submit"): background-color: #0065a4
The changes should be based on the currently running banner (see https://wikipedia.de/?banner=B19WPDE_01-191111_2_ctrl).