.alert.ng-hide-add, .alert.ng-hide-remove{
    -webkit-transition:all ease 1.0s;
    -moz-transition:all ease 1.0s;
    -o-transition:all ease 1.0s;
    transition:all ease 1.0s;
}

.alert.ng-hide-add{
    max-height: 200px;
    opacity: 1;
}

.alert.ng-hide-add.ng-hide-add-active{
    opacity: .8;
    max-height: 0px;
}

.alert.ng-hide-remove{
    opacity: .8;
    max-height: 0px;
}

.alert.ng-hide-remove.ng-hide-remove-active{
    max-height: 200px;
    opacity: 1;
}