body {
  color: black;
  background: #446;
  margin: 4em;
}

h1 { font-size: 150%; }

span.bg {
  padding: 10px;
  background-color: #ffffcc;
  border: 2px solid black;
}

h3 { display: inline; }

li {
  margin-bottom: 1em;
}

div.box {
  background-color: #ffffcc;
  margin-top: 1em;
  padding: 10px;
  border: 2px solid black;
}