main {
  padding: 5vh 5px;
  min-width: 0;
  flex-grow: 4;
}

main > * {
  margin: 5px auto;
  width: 50%;
  max-width: 800px;
}

main > p {
  text-align: center;
}

fieldset {
  display: flex;
  flex-flow: column wrap;
  justify-content: space-between;
  align-items: stretch;
}

label, button {
  margin-top: 18px;
}

button {
  align-self: flex-start;
}

input {
  width: 85%;
  max-width: 30ch;
}

textarea {
  height: 8rem;
  flex-grow: 4;
}

@media screen and (max-width: 640px) {
  main > * {
    width: 96%;
  }
  input { max-width:unset; }
}