body {
  background-color: darkblue;
  color: white;
  font-family: "Courier New", Courier, monospace;
}

a {
  color: lightgray;
}

h1, h2, h3, h4  {
  color: lightblue;
}

img {
  max-width: 80%;
  margin: 10px;
  float: left;
}

video {
  max-width: 80%;
  margin: 10px;
  float: left;
}

.sidebar {
  float: left;
  position: absolute;
  top: 0;
  left: 0;
  text-align: center;
  width: 20%;
  height: 100%;
  color: lightblue;
}

.content {
  float: right;
  position: absolute;
  top: 0;
  right: 0;
  background-color: darkblue;
  height: 100%;
  width: 80%;
  border: 0
}

#iframe_sidebar {
    position: relative;
    height: 100%;
    width: 100%;
}

#iframe_content {
    background-color: darkblue;
    position: relative;
    height: 100%;
    width: 100%;
    color: white;
}