body {
  max-width: 640px;
  margin: 40px auto;
  padding: 0 20px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  background: #ffffff;
  color: #111111;
}

header {
  margin-bottom: 20px;
}

h1 {
  font-size: 1.8rem;
  margin: 0;
}

.tagline {
  font-size: 0.95rem;
  color: #555555;
  margin-top: 4px;
}

nav {
  margin-bottom: 30px;
}

nav a {
  margin-right: 12px;
  text-decoration: none;
  color: #000000;
}

nav a:hover {
  text-decoration: underline;
}

main p {
  margin-bottom: 20px;
}

article {
  margin-bottom: 30px;
}

.date {
  font-size: 0.8rem;
  color: #666666;
  margin-bottom: 6px;
}

footer {
  margin-top: 60px;
  font-size: 0.8rem;
  color: #777777;
}