div.book-header {
  position: fixed;
}

::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background-color: #e4e4e4;
  border-radius: 100px;
}

::-webkit-scrollbar-thumb {
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
}

li.nav-item>a {
  text-decoration: none;
}

i.fa {
  font-weight: bold;
  color: #5f5f5f;
}

.page-toc-menu {
  background-color: #555555 !important;
  color: #cccccc !important;
  border-radius: 10px;
}

@media only screen and (min-width: 1024px) {
  div.book-header {
    top: 30px;
  }
  .nav-list .nav-item a {
    font-size: small !important;
  }
  .nav-list .nav-item a:hover {
    color: #f59542 !important;
  }
}

@media only screen and (max-width: 1024px) {
  ul.nav-list {
    display: none;
  }

  div.book-headr {
    top: 5px;
  }
}