@wordpress/block-library/build-style/form-submission-notification/editor.css

Block library for the WordPress editor.

.wp-block-form-submission-notification > * {
  opacity: 0.25;
  border: 1px dashed;
  box-sizing: border-box;
  background: repeating-linear-gradient(45deg, transparent, transparent 5px, currentColor 5px, currentColor 6px);
}
.wp-block-form-submission-notification.is-selected > *, .wp-block-form-submission-notification:has(.is-selected) > * {
  opacity: 1;
  background: none;
}
.wp-block-form-submission-notification.is-selected::after, .wp-block-form-submission-notification:has(.is-selected)::after {
  display: none !important;
}
.wp-block-form-submission-notification::after {
  display: flex;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  justify-content: center;
  align-items: center;
  font-size: 1.1em;
}
.wp-block-form-submission-notification.form-notification-type-success::after {
  content: attr(data-message-success);
}
.wp-block-form-submission-notification.form-notification-type-error::after {
  content: attr(data-message-error);
}