centered {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

#25height{
  min-height: 25vh;
}

#50height{
  min-height: 50vh;
}

#75height{
  min-height: 75vh;
}

#100height{
  min-height: 100vh;
}