Stuck Trying to Float Image Right on Mobile

Hi Guys,

Happy Holidays!!!

I'm trying to float the top image right on this page on mobile only. I've added the following to the container, but it doesn't seem to be taking. Do I need to add a class to the div for position also?

Using this css:

@media (max-width:768px) {
.float-right img {
float: right;
}
}