body {
  font-family: sans-serif;
  margin: auto;
  max-width: 1280px;
}

.navbar {
  background-color: #313236;
  border-radius: 2px;
  max-width: 800px;
}

.navbar a {
  color: #aaa;
  display: inline-block;
  font-size: 15px;
  padding: 10px;
  text-decoration: none;
}

.navbar a:hover {
  color: #ffffff;
}

img{
  min-width: 200px;
  min-height: 200px;
  max-width: 600px;
  max-height: 500px;
  display: block;
  margin: auto;
}

.a{
  list-style-type: circle;
}

.b{
  list-style-type: upper-roman;
}

#c{
  background-color: antiquewhite;
  font-family: monospace;
  font-size: 25px;
  color:cornflowerblue;
}

#d{
  font-family: monospace;
  font-size: 17px;
  color:aqua;
}