/* ====== Sidebar Style Enhancements ====== */

/* Section (part) titles */
.sidebar .sidebar-item-section {
  font-weight: 700;
  font-size: 1.05em;
  color: #0a4d8c;
  margin-top: 1em;
  padding-top: 0.6em;
  border-top: 2px solid #cce0f5;
  /*text-transform: uppercase;*/
  letter-spacing: 0.5px;
}

/* Chapter links under each Section */
.sidebar .sidebar-item {
  font-weight: 500;
  margin-left: 0.6em;
}

.sidebar .sidebar-item a {
  color: #333;
  text-decoration: none;
}

.sidebar .sidebar-item a:hover {
  color: #0a4d8c;
  text-decoration: underline;
}

/* Active chapter (highlighted) */
.sidebar .sidebar-item.active > a {
  font-weight: 700;
  color: #0069d9;
}

/* Add subtle background for hover */
.sidebar .sidebar-item a:hover {
  background-color: #f0f6ff;
  border-radius: 6px;
  padding: 2px 4px;
}

/* Extra spacing between parts */
.sidebar {
  line-height: 1.5;
}