.main-banner-progress-frame {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  z-index: 20;
}
.main-banner-progress {
  position: absolute;
  top: 1px; left: 0;
  height: 4px; width: 0%;
  background-color: rgba(255,255,255,0.5);
}

.banner-nav {
  opacity: 0;
  -webkit-transition: opacity 400ms;
  -moz-transition: opacity 400ms;
  -o-transition: opacity 400ms;
  transition: opacity 400ms;
} 

#main-banner:hover .banner-nav {
  opacity: 1;
}