.dropdown:hover .dropdown-menu {
  display: block;
}

@keyframes imgbreath {
  0% {
    background-size: 100% auto;
  }
  50% {
    background-size: 110% auto;
  }
  100% {
    background-size: 100% auto;
  }
}

.bkg {
  width: 100%;
  height: 100%;
  animation: imgbreath 6s linear infinite;
}