body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1em;
  margin: 1em;
}
.center {
  text-align: center;
}
.footer {
  font-size: 0.875em;
  border-top: 2px solid silver;
  margin-top: 1.25em;
  padding-top: 0.5em;
}
li {
  margin-bottom: 0.35em;
}
select,
button {
  font-size: 1em;
}
@media screen and (min-width: 1024px) {
  body {
    padding: 0.75em 2em;
  }
}