* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.8;
  color: #333;
  background-color: #fafafa;
  padding: 2rem 1rem;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: #1a1a1a;
}

h2 {
  font-size: 1.2rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  color: #1a1a1a;
  border-bottom: 1px solid #eee;
  padding-bottom: 0.25rem;
}

p, li {
  margin-bottom: 0.5rem;
}

ul {
  padding-left: 1.5rem;
}

.meta {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

a {
  color: #007aff;
}

footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #eee;
  font-size: 0.85rem;
  color: #888;
}