html {
  font-size: 22px;
}

body {
  font-family: sans-serif;
  background-color: palegoldenrod;
}

#container {
  max-width: 500px;
  margin: 2em auto;
  padding: 1.5em 1em;
  box-shadow: 0 0 3px 3px #b3b3b3;
  border-radius: 20px;
  background-color: lightskyblue;
}

label, input {
  display: block;
  margin: 0 auto 2rem;
  text-align: center;
}

input {
  font-size: 1.5em;
  padding: 10px;
  border-radius: 10px;
  border-style: solid;
  max-width: 220px;
}

#answer {
  text-align: center;
  font-size: 1.5rem;
}

footer a {
  font-size: 0.6em;
  float: right;
}