.messages__wrapper {
  position: relative;
}
.messages__wrapper .btn-close {
  background-image: url(../images/icon-close.png);
  background-repeat: no-repeat;
  background-size: 20px;
  background-position: center;
  width: 20px;
  height: 20px;
  position: absolute;
  right: 50px;
  top: 10px;
  cursor: pointer;
  background-color: white;
}