.sidebar {
  width: 220px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
}

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

.sidebar li {
  padding: 14px 18px;
  cursor: pointer;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
}

.sidebar li:hover {
  background: var(--bg-elevated);
}

.sidebar li.active {
  color: var(--text-primary);
  border-left-color: var(--accent);
  background: var(--bg-elevated);
}

.sidebar {
  transition: width 0.2s ease;
}

.sidebar.collapsed {
  width: 56px;
}

.sidebar.collapsed li {
  text-align: center;
  font-size: 0;
}

.sidebar.collapsed li::before {
  content: attr(data-section);
  font-size: 10px;
  color: var(--text-secondary);
}

.sidebar {
  display: flex;
  flex-direction: column;
}

.sidebar-main {
  flex: 1;
}

.sidebar-bottom {
  border-top: 1px solid #333;
  padding-top: 8px;
  padding-bottom: 8px;
}

.sidebar-bottom li {
  opacity: 0.85;
  font-size: 13px;
}

.sidebar-bottom li:hover {
  opacity: 1;
}