body { margin: 1em; } h1, h2, h3 { margin-top: 1em; } pre { margin: 0.5em 2em; padding: 0.5em; background-color: #eee; border: 1px solid #ddd; } table { margin-left: 1em; background-color: lightgray; } td, th { padding: 0.3em; } td { background-color: white; }