#devmode {
  position: fixed;
  z-index: 9999;
  flex: 0 0 5px;
  width: 100%;
  min-height: 5px;
  background: red;
  cursor: help;
  animation: fadeDev 0.25s infinite alternate;
}

@keyframes fadeDev {
  from {
    background: white;
  }
  to {
    background: red;
  }
}
.img-popup {
  display: block;
}