body {
  font-family: Arial, Helvetica, sans-serif;
  max-width: 900px;
  margin: auto;
  padding: 40px;
  line-height: 1.6;
  color: #333;
}

h1 {
  margin-bottom: 10px;
}

h2 {
  margin-top: 40px;
  border-bottom: 1px solid #ddd;
  padding-bottom: 5px;
}

p {
  margin: 12px 0;
}

ul {
  margin: 10px 0 20px 20px;
}

.index {
  background: #f7f7f7;
  padding: 20px;
  border-radius: 8px;
}