body {
  color: #000000;
  margin-left: 5%;
  margin-right: 5%;
  background-color : #dcdcdc;
}

h1 { 
  font-size: 200%;
  font-family: sans-serif; 
}

h2 { 
  font-size: 150%;
  font-family: sans-serif;
}

h3,h4,h5,h6 {
  font-size: 100&; 
  font-family: sans-serif; 
}

pre {
  font-family: monospace;
}
  
p,ul {
  font-family: sans-serif; 
}