body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header, main, footer {
  padding: 1rem 2rem;
}

nav {
  margin-top: 0.5rem;
}

.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1rem;
  background: #2563eb;
  color: white;
  text-decoration: none;
  border-radius: 0.3rem;
}