html, body {
  height: 100%;
  margin: 0;
}

#wrapper{
    display: block;
    width: 100%;
    height: 100%;
    background-color: #c4c4c4;
}

#image-container{
  display: block;
  width: 100%;
  height: 100%;
}

.gallery-image{
  display: block;
  height: 100%;
}

#menu-bar{
  position: absolute;
  bottom: 5rem;
  left: 50%;
  display: block;
  width: 30rem;
  height: 5rem;
  background-color: #f8f8f8;
  transform: translateX(-50%);
  border-radius: 5rem;
}