html {
  background-color: #ddd;
}

body {
  font-family: monospace;
  margin: 0 30%;
  background-color: white;
  padding: 20px;
  box-sizing: border-box;
  min-height: 100vh;
}

.code-block {
  white-space: pre;
  overflow-x: auto;
  font-family: Consolas, monospace;
  font-size: 14px;
  background-color: #f5f5f5;
  border-left: 4px solid black;
  color: #2a2a2a;
  padding: 10px 15px;
  margin: 1em 0;
  border-radius: 4px;
}