html {
    margin: auto;
    max-width: 72ch;
}
body { margin-bottom: 2rem }
h1, h2, h3, h4, h5, h6 { margin: 1ex 0 }
a { text-decoration: none }
a:hover { text-decoration: underline }
form {
    display: grid;
    grid-template-columns: max-content 1fr 0;
}
form input { margin-bottom: 1ex }
form label {
    align-self: center;
    margin-right: 1ch;
}
form label.error {
  color: ActiveText;
  margin-top: -1ex;
  margin-bottom: 1ex;
}