body {
  font-family:
    "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans",
    Meiryo, sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}

header {
  background-color: #007aff;
  color: white;
  padding: 20px 0;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
}

main {
  max-width: 800px;
  margin: 20px auto;
  padding: 0 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

section {
  padding: 20px 0;
  border-bottom: 1px solid #eee;
}

section:last-child {
  border-bottom: none;
}

h2 {
  color: #444;
  font-size: 1.2rem;
  margin-bottom: 15px;
  border-left: 4px solid #007aff;
  padding-left: 10px;
}

h3 {
  font-size: 1.1rem;
  margin-top: 20px;
  margin-bottom: 10px;
  color: #555;
}

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 5px;
}

a {
  color: #007aff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 20px;
  color: #777;
  font-size: 0.9rem;
  margin-top: 20px;
}