.sidebar {
  grid-area: sidebar;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 0;
}

.sidebar-nav {
  padding: 0;
}

.project-group {
  margin-bottom: 2px;
}

.project-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 10px 16px;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  gap: 8px;
  transition: background var(--transition);
}

.project-toggle:hover {
  background: var(--color-surface-hover);
}

.project-group.active > .project-toggle {
  color: var(--color-primary);
}

.project-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

.project-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.project-arrow {
  font-size: 0.7rem;
  transition: transform var(--transition);
  color: var(--color-text-secondary);
}

.project-toggle[aria-expanded="true"] .project-arrow {
  transform: rotate(90deg);
}

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

.doc-item {
  position: relative;
}

.doc-item a {
  display: block;
  padding: 7px 16px 7px 40px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  transition: all var(--transition);
  border-left: 2px solid transparent;
}

.doc-item a:hover {
  color: var(--color-text);
  background: var(--color-surface-hover);
}

.doc-item.current a {
  color: var(--color-primary);
  background: var(--color-current);
  border-left-color: var(--color-primary);
}

.doc-item.hidden {
  display: none;
}

.sidebar-backdrop {
  display: none;
}