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

#background {
 background-image: url(images/mars.png) ;
  height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: 110% 100%;
    z-index: -1;
}

#forge {
  position:absolute;
  top: 45vh;
  left: 55vh;
  min-width: 300px;
  min-height: 300px;
  border-radius: 400px;
  box-shadow: 10px 10px 10px 10px red;
  transition: box-shadow .20s ease-in-out;
  cursor: pointer;
}

#forge:hover {
  box-shadow: 10px 10px 10px 10px green;
  transition: box-shadow .30s ease-in-out;
}

#burnip {
min-height: 100px;
    margin: 0;
    position: absolute;
    top: 0;
    left: 70vh;
    width: 650px;
}