* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  color: #1a1a1a;
}

header {
  border-bottom: 1px solid #eee;
  margin-bottom: 2rem;
}

nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  color: #333;
  text-decoration: none;
}

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

nav .brand {
  font-weight: 600;
  margin-right: auto;
}

main h1 {
  margin-top: 0;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid #eee;
  font-size: 0.9rem;
  color: #666;
}

footer a {
  color: #333;
  text-decoration: none;
}

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