body {
  padding: 0 4em;
  margin: 2em auto;
  max-width: 75ch;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji"; 
  font-size: 16px;
  background-color: #fff;
  color: #000;
}

h1 {
  margin: 0px;
}

a {
  color: #005386;
}

img,video {
  max-width: 100%;
  height: auto;
}

hr {
  margin: 1em auto;
  border: none;
  border-top: 1px solid #ddd;
}

pre {
  background: #f6f8fa;
  border: 1px solid #dddddd;
  padding: 1em;
  margin: 1em 0;
  overflow-x: auto;
  border-radius: 5px;
  font-size: 85%;
}

code {
  font-family: ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,Liberation Mono,monospace;
}

ul, ol {
  padding-left: 15px;
}

.shell {
  padding: 1em;
}

@media (prefers-color-scheme: dark) {

body {
  background-color: #000;
  color: #bdbdbd;
}

a {
  color: #56c8ff;
}

hr { 
  border-top: 1px solid #5f6368;
}

pre { 
  border: 1px solid #5f6368;
  background: #000;
}