jstacoder/flask-tasks

.modal-backdrop.am-fade {
      opacity: .5;
      transition: opacity .15s linear;
      &.ng-enter {
          opacity: 0;
          &.ng-enter-active {
              opacity: .5;
          }
      }
      &.ng-leave {
          opacity: .5;
          &.ng-leave-active {
              opacity: 0;
          }
    }
}