body {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem;
  font-family: system-ui, sans-serif;
}
a {
  color: #0070f3;
}
header {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding-bottom: 1rem;
  border-bottom: 1px solid #eee;
}
header a {
  text-decoration: none;
  color: inherit;
}
nav {
  display: flex;
  gap: 1rem;
}
footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #eee;
  color: #666;
  font-size: 0.875rem;
}
article img {
  max-width: 100%;
}
