* {
  font-family: sans-serif;
  font-size: small;
}
body {
  margin: 1em 8% 1em 10%;
}
.center {
  margin: auto;
  text-align: center;
}
h1 {
  background-color: #aaaaff;
  border-top: thin solid #0000ff;
  font-size: x-large;
  padding: 5px;
}
h2 {
  font-size: large;
}
h3 {
  font-size: medium;
}