html {
 height: 100%;
 background: no-repeat center center fixed;
 background-size: cover;
 -webkit-background-size: cover;
 -moz-background-size: cover;
 -o-background-size: cover;
}

body,main {
 height: 98%;
}




#logo { 
  position: fixed;
  bottom: 0;
  right: 0;
}

#credit { 
  position: fixed;
  bottom: 0;
  left: 0;
}


.grid {
  display: grid;
  width: 100%;
  height: 100%;
  grid-gap: 1px;
  grid-template-columns: repeat(3, 1fr);
  
}

.link
{ 
  display: block;
  width: 100%;
  height: 100%;
}