body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
}

h1 {
  border-bottom: 2px solid #333;
  padding-bottom: 10px;
  font-size: 1.6em;
}

h2 {
  margin-top: 2em;
  font-size: 1.3em;
  color: #222;
}

h3 {
  font-size: 1.1em;
  color: #444;
}

a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul {
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.5em;
}

.updated {
  color: #666;
  font-size: 0.9em;
}

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