html, body {
  margin: 0;
  padding: 0;
  font-family: 'Georgia', serif;
  background-color: #f5f5f5;
}

canvas {
  display: block;
  margin: 20px auto;
  border: 10px solid #333;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

.book-title {
  font-weight: bold;
  color: #333;
}

.book-content {
  color: #666;
  margin-left: 20px;
}

.distance {
  font-style: italic;
  color: #999;
  margin-top: 10px;
}