change placement ?

Make the following style changes:

#cookie_opt_in_top_bar_container {
  position: fixed;
  bottom: 0; /* remove the top: 0; line */
}

#cookie_opt_in_container form {
  bottom: 0; /* remove the top: 0; line */
}

#cookie_opt_in_toggle {
  position: fixed;
  bottom: 0; /* remove the top: 0; line */
}

This probably won’t work in Internet Explorer 7 or older, but at least it’ll get you in the right direction.