.sidebar .nav-label {
  width: calc(100% - 10px);
  justify-content: flex-start;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: filter 0.18s ease, background 0.18s ease;
}

.sidebar .nav-label:hover {
  filter: brightness(1.18);
}

.nav-label .nav-chevron {
  width: 16px;
  height: 16px;
  margin-left: auto;
  color: var(--section-accent);
  transform: rotate(90deg);
  transition: transform 0.22s ease;
}

.nav-group-items {
  max-height: 520px;
  overflow: hidden;
  opacity: 1;
  transform: translateY(0);
  transition: max-height 0.26s ease, opacity 0.18s ease, transform 0.22s ease;
}

.nav-group.is-collapsed .nav-group-items {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-5px);
}

.nav-group.is-collapsed .nav-label .nav-chevron {
  transform: rotate(0deg);
}

.nav-group.is-collapsed .nav-label {
  margin-bottom: 0;
  background: rgba(255, 255, 255, 0.035);
}

.nav-group:has(.nav-item.active) .nav-label {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--section-accent) 24%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  .nav-group-items,
  .nav-label .nav-chevron {
    transition: none;
  }
}