#content.ng-enter,
#content.ng-leave{
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -o-transition: all 1s ease;
    transition: all 1s ease;
}
#content.ng-enter{
    opacity: 0;
}
#content.ng-enter-active{
    opacity: 1;
}
#content.ng-leave{
    opacity: 1;
}
#content.ng-leave-active{
    opacity: 0;
}