body {
    margin: 0;
    background-color: black;
    color: green;
}

ul {
    margin: 0;
    padding: 0;
    width: 10%;
    position: fixed;
    overflow: auto;
}

li a {
    display: block;
    color: green;
    padding: 8px 0px 8px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: green;
    color: black;
}

div {
    margin-left: 10%;
    padding: 1px 16px;
    text-align: center;
}

h2 {
    padding: 100px 0px 0px 0px;
}

h3 {
    padding: 50px 0px 0px 0px;
}

table {
    padding: 20px 0px 40px 0px;
}

td {
    padding: 0px 10px 0px 0px;
}

a {
    color: green;
}

pre {
    text-align: left;
}

.padded {
    padding: 0px 0px 40px 0px;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}