body {
  font-family: sans-serif;
}

a {
  color: blue;
  text-decoration: none;
}

/* Section styles */
section {
  margin-bottom: 2em;
}

h1 {
  font-size: 2em;
}

ul {
  font-size: 0.8em;
  margin-left: 2em;
}

/* Syllabus section styles */
.syllabus {
  text-align: center;
  border: 1px solid black;
}

/* Books section styles */
.books {
  background-color: lightblue;
  padding: 1em;
}

/* Videos section styles */
.videos {
  background-color: lightpink;
  padding: 1em;
}

/* Book link styles */
.book-link {
  font-weight: bold;
  color: blue;
  text-decoration: none;
}

.book-link:hover {
  color: red;
  text-decoration: underline;
}

/* Video link styles */
.video-link {
  font-weight: bold;
  color: blue;
  text-decoration: none;
}

.video-link:hover {
  color: red;
  text-decoration: underline;
}

/* Chapter heading styles */
.books h3 {
  font-size: 1.5em;
}

.videos h3 {
  font-size: 1.5em;
}