html {
  min-height: 100%;
  margin-left: calc(100vw - 100%);
}
body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  min-height: 100vh;
}
main {
 -webkit-box-flex: 1;
 -ms-flex: 1 0 auto;
  flex: 1 0 auto;
}