body {
  margin: 0;
  padding: 0;
  font-family: system-ui, sans-serif;
  max-width: 750px;
  line-height: 1.6;
  margin: auto;
  padding: 1rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: #555;
}

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

article {
  margin-bottom: 2.5rem;
}

.date {
  color: #777;
  font-size: 0.9em;
}

footer {
  text-align: center;
  margin-top: 3rem;
  color: #888;
  font-size: 0.9em;
}