Menu Lateral Recolhível

.sidebar {
  width: 240px;
  height: 100vh;
  background: rgba(255,255,255,0.02);
  border-right: 1px solid rgba(255,255,255,0.06);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.sidebar.collapsed {
  width: 64px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 1rem;
  border-radius: 0.5rem;
  color: rgba(255,255,255,0.5);
  transition: all 0.2s;
  white-space: nowrap;
}

.sidebar-item:hover,
.sidebar-item.active {
  background: rgba(139, 92, 246, 0.12);
  color: #fff;
}

.sidebar-item .label {
  opacity: 1;
  transition: opacity 0.2s;
}

.sidebar.collapsed .sidebar-item .label {
  opacity: 0;
  pointer-events: none;
}