body {
    bbackground-color: skyblue;
}

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

body {
    font-size: 0.875rem;
    height: 100%;
    display: grid;
    grid-template-rows: auto 1fr auto;
}

.loginform {
    display: grid;
    place-items: center;
    height: 100%;
}

.loginform form {
    width: 40ch;
}