body {
  font-family: monospace;
  background: #f4f6f8;
  color: #222;
}

.card {
  border: 2px solid #333;
  padding: 10px;
  margin: 10px 0;
  background: #fff;
}

h1 {
  text-align: center;
}

a {
  color: blue;
}