body {
  background: yellow;
}

h1 {
  color: black;
  text-align: center;
}

h2 {
  color: black;
  text-align: left;
}

h3 {
  color: green;
  text-align: left;
}

p {
  font-family: verdana;
  font-size: 20px;
}
ul {
font-family: verdana;
  font-size: 20px;
}

.sidenav {
  height: 100%;
  width: 200px;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: #111;
  overflow-x: hidden;
}

.sidenav a {
  color: white;
  padding: 16px;
  text-decoration: none;
  display: block;
}

.sidenav a:hover {
  background-color: #ddd;
  color: black;
}

.content {
  margin-left: 200px;
  padding-left: 20px;
}