body,
html {
  margin: 0;
  padding: 0;
  font-family: Helvetica, Arial, sans-serif;
  display: flex;
  align-items: center;
  /* justify-content: center; */
  flex-direction: column;
  min-width: 100dvw;
  min-height: 100dvh;
}
main {
  display: block;
  max-width: 64ch;
  width: calc(100% - 8rem);
  padding: 4rem 2rem 2.5rem 2rem;
}
main > :first-child {
  margin-top: 0;
}
main > :last-child {
  margin-bottom: 0;
}
.banner {
  background: #ffd100;
  color: #000000;
  text-align: center;
  font-size: 1rem;
  font-weight: 1rem;
  display: block;
  width: 100%;
  padding: 0.2rem;
}
h1 small {
  font-size: 1rem;
}