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

#container {
  width: 900px;
  margin: 40px auto;
  border: 5px solid hotpink;
}

#header {
  background: linear-gradient(to right, pink, yellow, lime, cyan);
  padding: 20px;
  text-align: center;
  font-family: Comic Sans MS, Arial;
  color: cyan;
}

#sidebar {
  width: 200px;
  float: left;
  background-color: #000066;
  padding: 15px;
  height: 100%;
}

#content {
  margin-left: 220px;
  padding: 15px;
  background-color: black;
  color: cyan;
}

a {
  color: hotpink;
  text-decoration: none;
  font-family: Comic Sans MS;
}

a:hover {
  color: yellow;
  text-decoration: underline;
}

#content img {
  display: block;
  margin: 10px auto;
}

.signature {
  color: cyan;
  font-size: 18px;
  letter-spacing: 2px;
}