.banner-holder {
  display: none;
  position: fixed;
  top: 80px;
  left: 50%;
  width: 300px;
  height: 100px;
  z-index: 10;
  background-color: #fff;
  transform: translateX(-50%);
  cursor: pointer;
}
.banner-holder.visible {
  display: block;
}
@media (min-width: 760px) {
  .banner-holder {
    top: 0;
  }
}