.bmm-modal-controls {
  position: fixed;
  bottom: 0;
  left: 50%;
  background-color: #fff;
  border-radius: 5px 5px 0 0;
  padding: 10px;
  cursor: pointer;
  margin-left: -2.5em;
  font-size: 24px;
  box-shadow: 0 2px 8px 4px #555;
}