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

.wrapper {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}
.wrapper main {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
#under-construction{
  text-align: center;
}
footer {
  margin-top: auto; /* pushes footer to bottom */
}