/* Sidebar Navigation Styles */

.page-container {
  display: flex;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}

.sidebar-container {
  width: 280px;
  min-width: 280px;
  background: #f5f5f5;
  border-right: 1px solid #ddd;
  position: sticky; /* as you scroll down to read, the sidebar remains in place */
  top: 0;
  align-self: flex-start;
  max-height: 100vh;
  overflow-y: auto;
  padding: 20px 0;
}

.main-content {
  flex: 1;
  padding: 20px 40px;
  min-width: 0;
}

.sidebar-navigation {
  padding: 0 15px;
  font-size: 14px;
}

.sidebar-header h3 {
  margin: 0 0 20px 0;
  font-size: 1.2em;
  color: #333;
  border-bottom: 2px solid #337ab7;
  padding-bottom: 10px;
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-item {
  margin: 0;
  padding: 0;
}

.sidebar-item-header {
  overflow: hidden;
}

.sidebar-toggle {
  display: inline-block;
  width: 16px;
  cursor: pointer;
  user-select: none;
  color: #666;
  font-size: 0.8em;
  margin-left: 4px;
  vertical-align: middle;
  float: right;
}

.sidebar-toggle.sidebar-spacer {
  cursor: default;
  visibility: hidden;
}

.sidebar-link {
  display: inline-block;
  padding: 3px 8px;
  text-decoration: none;
  color: #337ab7;
  border-radius: 3px;
  transition: background-color 0.2s;
  max-width: calc(100% - 20px);
  vertical-align: middle;
  font-size: 0.9em;
}

.sidebar-link:hover {
  background-color: rgba(51, 122, 183, 0.1);
}

.sidebar-link.active {
  background-color: #337ab7;
  color: white;
  font-weight: bold;
}

.sidebar-label {
  color: #666;
  margin-right: 4px;
}

.sidebar-link.active .sidebar-label {
  color: #cce6ff;
}

.sidebar-subsections {
  margin-left: 20px;
  margin-top: 2px;
  margin-bottom: 2px;
}

.sidebar-chapter > .sidebar-link {
  font-weight: 600;
  font-size: 0.95em;
  margin-top: 4px;
}

.sidebar-section > .sidebar-link {
  font-size: 0.85em;
}