body {
    background: black;
    color: chartreuse;
    font-family: "Courier New";
  }

  a {
    color: chartreuse;
  }

  a:hover {
    color: yellow;
  }

  img {
    margin-left: auto;
    margin-right: auto;
    display: block;
  }

  .links {
    float:right;
    width: 100px;
  }

  .links a {
    display: block;
  }

  .content {
    float: left;
    width: calc(100% - 160px);
  }

  .box {
    border: solid chartreuse 1px;
    margin: 4px;
    padding: 10px;
  }

  .box h1, .box h2 {
    margin-top: 0;
  }

  hr {
    clear: both;
  }

  article {
    padding-top: 4px;
    padding-bottom: 4px;
  }