section[role="book-index-header"] {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 100px auto 20px;
  width: 100%;
  max-width: 900px;
}

section[role="book-index-header"] > div[role="book-index-header-left"] {
  text-transform: capitalize;
  display: inline-block;
  color: var(--white);
  font-size: 3em;
}

section[role="book-index-header"] > div[role="book-index-header-right"] {
  text-align: right;
  display: inline-block;
}

section[role="book-index-pages"] {
  margin: 0 auto;
  width: 100%;
  max-width: 900px;
}

section[role="book-index-pages"] > a.page-link {
  vertical-align: top;
  display: inline-block;
  width: 100%;
  text-decoration: none;
  margin: 0 0 20px;
  border-radius: 3px;
  height: 350px;
  overflow: hidden;
}

section[role="book-index-pages"] > a.page-link div.page-video {
  width: 100%;
  height: 350px;
  display: flex;
  justify-content: left;
  align-items: center;
  border-radius: 5px;
  border-bottom: none;
  position: relative;
}

section[role="book-index-pages"] > a.page-link video {
  width: 100%;
  height: 100%;
  position: absolute;
  object-fit: cover;
}

section[role="book-index-pages"] > a.page-link > div.page-bg {
  width: 100%;
  height: 350px;
  display: flex;
  justify-content: left;
  align-items: center;
  border-radius: 5px;
  border-bottom: none;
  position: relative;
}

section[role="book-index-pages"] aside {
  font-size: 1.1em;
  color: var(--white);
  text-shadow: 2px 2px 2px var(--black);
  padding: 10px;
  position: relative;
}

section[role="book-index-pages"] hr {
  color: var(--white);
  border: 0.1px solid;
  margin: 7px 0;
}

section[role="book-index-pages"] button[data-active="true"] {
  background: var(--primary);
  color: var(--tertiary);
}

section[role="book-index-pages"] button[data-active="false"] {
  background: var(--secondary);
}

section[role="book-index-pages"] > div[role="paginate"] {
  width: fit-content;
  margin: 0 auto;
  font-size: 1.5em;
  color: var(--highlight);
}

section[role="book-index-pages"] > div[role="paginate"] i {
  color: var(--secondary);
}

section[role="book-index-pages"] > div[role="paginate"] a,
section[role="book-index-pages"] > div[role="paginate"] span {
  display: inline;
}

section[role="book-index-pages"] > div[role="paginate"] span {
  position: relative;
  top: -15px;
}