<style> body { max-width: 40em; margin: auto; font-family: -apple-system, BlinkMacSystemFont,“Segoe UI”, “Roboto”, “Oxygen”, “Ubuntu”, “Cantarell”, “Fira Sans”,“Droid Sans”, “Helvetica Neue”, sans-serif; padding: 0 2%; } footer {text-align:center;font-size: 0.8em;margin-top:5vh;} pre {border:1px solid #212121;padding:1em;overflow:auto;} </style>