.alerts {

  .ng-enter {
    -webkit-animation: fadeIn 1s;
    -moz-animation: fadeIn 1s;
    -o-animation: fadeIn 1s;
    animation: fadeIn 1s;
  }

  .ng-leave {
    -webkit-animation: fadeOut 0.5s;
    -moz-animation: fadeOut 0.5s;
    -o-animation: fadeOut 0.5s;
    animation: fadeOut 0.5s;
  }

}