css
body {
  background-color: #000000;
  color: #FFFFFF;
  font-size: 24px;
  font-family: "Arial Black", sans-serif;
  margin: 0;
  padding: 0;
  border: 4px solid #FF0000;
  box-shadow: 0px 0px 0px #FF0000;
}

a {
  text-decoration: none;
  color: #0000FF;
  font-weight: bold;
  text-shadow: 0px 0px 0px #0000FF;
  border: 4px solid #0000FF;
  border-radius: 0px;
  background-color: #FFFFFF;
  padding: 10px 20px;
  display: inline-block;
}

h1 {
  font-size: 48px;
  font-weight: bold;
  text-transform: uppercase;
  color: #FF0000;
  border-bottom: 4px solid #FF0000;
  border-bottom: 4px solid #FF0000;
  margin: 0;
  padding: 0;
  background-color: #000000;
  border: 4px solid #FF0000;
  box-shadow: 0px 0px 0px #FF0000;
}

h2 {
  font-size: 32px;
  font-weight: bold;
  text-transform: uppercase;
  color: #00FF00;
  border-bottom: 4px solid #00FF00;
  margin: 0;
  padding: 0;
  background-color: #000000;
  border: 4px solid #00FF00;
  box-shadow: 0px 0px 0px #00FF00;
}

p {
  font-size: 18px;
  color: #FFFFFF;
  margin: 10px 0;
  padding: 10px 0;
  background-color: #000000;
  border: 4px solid #000000;
  border-bottom: 4px solid #000000;
  box-shadow: 0px 0px 0px #000000;
}

code {
  font-size: 18px;
  background-color: #000000;
  border: 4px solid #000000;
  padding: 4px 8px;
  border-radius: 4px;
  color: #FFFFFF;
}

pre {
  font-size: 18px;
  background-color: #000000;
  border: 4px solid #000000;
  padding: 4px 8px;
  border-radius: 4px;
  color: #FFFFFF;
}