:root {
  font-family: Arial, FreeSans, sans-serif;
}
form {
  max-width: 210mm; /* DIN-A 4 */
  margin: 0 auto;
  padding: 0 5mm 5mm;
  border: 2px solid black;
  border-radius: 0 8mm 0 8mm;
}
h1 {
  color: #009682;
  text-align: center;
}
label {
  display: block;
  font-weight: bold;
  margin-top: 4mm;
}
textarea {
  display: block;
  width: 100%;
  height: 14lh;
  margin: 1mm 0;
}
button {
  display: block;
  margin: 4mm auto 0;
  font-size: 1.5em;
}
#info.success {
  color: #070;
}
#info.error {
  color: #900;
}