.myalert-custom {
  background-image: url("../img/alert-custom.jpg");
  background-position: center;
  background-size: cover;
  border-left: 0;
  position: relative;
  z-index: 1;
}
.myalert-custom:before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(34, 34, 34, 0.4);
  z-index: -1;
}

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