a {
  max-width: 90%;
  margin: auto;
}

a:link {color:lightblue;}

a:visited {color:plum;}

body {
  background-color: #1f1f1f;
  color: #ffffff;
  margin-left: auto;
  margin-right: auto;
  max-width: 800px;
  padding-left: 5%;
  padding-right: 5%;
}

code {
  max-width: 90%;
  margin: auto;
}

h1 {text-align: center;}

h2 {text-align: center;}

h3 {text-align: center;}

img{
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 800px;
  padding-bottom: 12px;
  width: 80%;
}

p {
  max-width: 90%;
  margin: auto;
  padding-bottom: 12px;
}

pre {
  border: 1px solid #ffffff;
  max-width: 80%;
  margin: auto;
  margin-bottom: 12px;
  overflow-x: auto;
  padding: 12px;
}