body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f7f7;
  color: #111;
}

main {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.tagline {
  font-size: 1.1rem;
  color: #444;
  margin-bottom: 2rem;
}

h2 {
  margin-top: 2rem;
  font-size: 1.25rem;
}

ul {
  padding-left: 1.2rem;
}

footer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #555;
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid #aaa;
}