.accordion-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-duration);
}

.accordion-content:not([aria-hidden]) {
  grid-template-rows: 1fr;
}

.accordion-content > div {
  overflow: hidden;
  padding: 0 2px;
}

.accordion-button {
  background: transparent;
  border: 0;
  position: relative;
  margin-left: 20px;
}

.accordion-button::before,
.accordion-button::after {
  position: absolute;
  left: -20px;
  content: '⌃';
  transition: transform var(--transition-duration);
}

.accordion-button:not([aria-expanded])::before,
.accordion-button:not([aria-expanded])::after {
  transform: rotate(180deg);
}

/* Add Content Button and Form Styles */
.accordion-parent h3 {
  display: flex;
  align-items: center;
  gap: 8px;
}

.accordion-action {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.add-content-container {
  display: flex;
  align-items: center;
  gap: 6px;
}

.add-content-button {
  background: var(--color-primary, #007bff);
  color: white;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
  
}

.add-content-button:hover {
  background: var(--color-primary-dark, #0056b3);
}

.add-content-button:active {
  transform: scale(0.95);
}

.add-content-button.open {
  transform: rotate(45deg);
  background: var(--color-danger, #dc3545);
}

.add-content-button.open:hover {
  background: var(--color-danger-dark, #bd2130);
}

/* Cancel state (× button) */
.add-content-button-cancel {
  background: var(--color-danger, #dc3545);
  font-size: 24px;
}

.add-content-button-cancel:hover {
  background: var(--color-danger-dark, #bd2130);
}

@keyframes fade-in {
     from { opacity: 0; }
   }

@keyframes fade-out {
  to { opacity: 0; }
}

@keyframes slide-from-right {
  from { transform: translateX(90px); }
}

@keyframes slide-to-right {
  to { transform: translateX(90px); }
} 

::view-transition-old(slide-it) {
  animation: 200ms cubic-bezier(0.4, 0, 1, 1) both fade-out,
  200ms cubic-bezier(0.4, 0, 0.2, 1) both slide-to-right;
}
::view-transition-new(slide-it) {
  animation: 200ms cubic-bezier(0, 0, 0.2, 1) 90ms both fade-in,
  200ms cubic-bezier(0.4, 0, 0.2, 1) both slide-from-right;
}

.add-content-form {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  flex: 1;
  view-transition-name: slide-it;
}

.add-content-input {
  padding: 4px 8px;
  border: 1px solid var(--color-border, #ccc);
  border-radius: 4px;
  font-size: 14px;
  min-width: 150px;
  flex: 1;
}

.add-content-input:focus {
  outline: none;
  border-color: var(--color-primary, #007bff);
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.1);
}

.add-content-input:invalid {
  border-color: var(--color-danger, #dc3545);
}

.add-content-input:invalid:focus {
  box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.1);
}


#selectedFolder .folder-tree-button {
  background: transparent;
  border: 0;
  padding: 0;
  width: 100%;
  text-align: start;
  cursor: pointer;
  position: relative;
  padding-left: 2.25em;
}

#selectedFolder .folder-tree-button:hover {
  background-color: var(--border-color);
}

#selectedFolder .folder-tree-button::before {
  display: inline-block;
  content: '⌃';
  transform: rotate(90deg);
  transition: transform var(--transition-duration);
  position: absolute;
  left: 0;
}

#selectedFolder .folder-tree-button.tree-icon::after {
  left: 1em;
}

#selectedFolder .folder-tree-button[aria-expanded]::before {
  transform: rotate(180deg);
}

#selectedFolder .tree-icon::after {
  display: inline-block;
  content: '';
  width: 0.8em;
  height: 0.8em;
  background-size: cover;
  position: absolute;
  inset: 0;
  margin-block: auto;
}

#selectedFolder .directory::after {
  background-image: url('../images/directory.svg');
}

#selectedFolder .accordion-content > div > .accordion-parent {
  padding-left: 0.5rem;
  border-left: 1px solid var(--border-color);
  margin-left: 0.25em;
}

#selectedFolder .folder-tree-button.no-arrow::before {
  display: none;
}

#selectedFolder .folder-tree-selected {
  background-color: var(--highlighted-color) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: 3px;
}

/* Form validation status */
.selection-status {
  background-color: #fee;
  color: #c00;
  padding: 0.5rem;
  border: 1px solid #fcc;
  border-radius: 3px;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.selection-status.hidden {
  display: none;
}