body {
  margin: 0;
  font-family: Arial, sans-serif;
}

h1 {
  color: #333;
}

.content {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

.code-block {
  background-color: #f5f5f5;
  padding: 15px;
  border-radius: 5px;
}

.code-block pre {
  background-color: #ffffff;
  overflow-x: auto;
}

.line-number {
  float: left;
  width: 40px;
  text-align: right;
  padding: 5px 0;
  font-size: 12px;
  color: #999;
}

.line-number code {
  color: #000;
}

pre code {
  word-wrap: break-word;
}