.box {
  position: relative;
  height: 600px;
  border: 2px solid black;
}

.box:after {
  content: "";
  display: table;
  clear: both;
}

.lastfm {
  position: absolute;
  bottom: 0;
  left: 10px;
}

.nav {
  font-size: 1.4em;
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 25%;
  height: 100%;
  background-color: #f1f1f1;
  position: absolute;
}

.navli {
  display: block;
  color: #000;
  padding: 8px 16px;
  text-decoration: none;
}

.navli a {
  display: block;
  color: #000;
  padding: 8px 16px;
  text-decoration: none;
}

.navli a.active {
  background-color: #04AA6D;
  color: white;
}

.navli a:hover:not(.active) {
  background-color: #555;
  color: white;
}

.contentframe {
  width: 65%;
  height: 600px;
  left: 390px;
  border: 1px solid black;
  position: absolute;
}