style.css

html { 
    align-items: center;
    background-color: rgb(43, 43, 43);
    color: rgb(255, 255, 255);
    font-size: large;
}
body { 
    width: 35em; 
    margin: 0 auto;
    font-family: Tahoma, Verdana, Arial, sans-serif; 
}

h1 {
    align-items: left;
    font-size: larger;
}

.chaptered-jackson {
  margin: 5px;
  height: 300;
  width: 100;
  padding: 10px;
  align-items: center;
  font-size: medium;
  border-radius: 2px;
  color: #ddd;
  border-color: rgb(0, 138, 138);
  background-color: rgb(131, 131, 131);
}

footer {
  width: 80%;
  padding: 10px;
  font-size: medium;
  color: #ddd;
  border-color: rgb(0, 138, 138);
  background-color: rgb(80, 80, 80);
}

.header {
  width: 80%;
  font-size: medium;
  color: #ddd;
  border-color: rgb(0, 138, 138);
  background-color: rgb(80, 80, 80);
}

.title-button:hover {
  background-color: #ff0000;
  padding: 14px 16px;
  text-decoration: none;
}

.title-button {
  background-color: #f2f2f2;
  color: black;
  padding: 14px 16px;
  text-decoration: none;
}

.topnav {
  background-color: #333;
  overflow: hidden;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: x-large;
}

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

.topnav a.active {
  color: white;
}