html{
    height: 100%;
}
body {
    display: flex;
    flex-direction: column;
    height: 100%;    
    margin: 0;
}
.SiteParent {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
    height: auto;
    margin: 0;
}
.Site {
  display: flex;
  flex-direction: column;
  height: 100%; 
}

.Site-header,
.Site-footer {
  flex: none; 
  flex-shrink: 0;
}

.Site-content {
  flex: 1 0 auto; 
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
}