/* Sortable nested group list (drag handles, toolbar, item rows) — GitHub issue #89.
   Partials: app/views/shared/components/_sortable_list_*.html.erb; checklist editor is the first consumer.
   All structural selectors are scoped under .sortable-list on the root wrapper. */
@layer components {

.sortable-list {
  margin-top: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sortable-list .checklist-editor-group {
  margin: 0;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
}

/* .card adds padding in components/card.css; force zero so group stays compact */
.sortable-list .checklist-editor-group.card {
  padding: 0;
}

.sortable-list .checklist-editor-group--dragging {
  opacity: 0.85;
  box-shadow: 0 8px 24px color-mix(in srgb, black 12%, transparent);
}

.sortable-list .checklist-editor-group--drop-before {
  box-shadow: 0 -3px 0 0 var(--color-primary);
}

.sortable-list .checklist-editor-group--drop-after {
  box-shadow: 0 3px 0 0 var(--color-primary);
}

/* Group header: single compact row, content vertically centered */
.sortable-list .checklist-editor-group__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-3);
  min-height: 0;
  height: 1.5rem;
  max-height: 1.5rem;
  overflow: hidden;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 2;
  box-shadow: 0 1px 0 0 var(--color-border);
}

.sortable-list .checklist-editor-group__handle {
  flex-shrink: 0;
  cursor: grab;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1;
  user-select: none;
  padding: 2px;
}

.sortable-list .checklist-editor-group__handle:active {
  cursor: grabbing;
}

.sortable-list .checklist-editor-group__name {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  font-size: 0.875rem;
  line-height: 1.25;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  padding: 0;
  min-height: 0;
}

/* Override global .form-group input padding so this row stays compact */
/* Group name input: zero padding/margin, fill header height, text vertically centered */
.sortable-list .checklist-editor-group .checklist-editor-group__name,
.sortable-list .checklist-editor-group input.checklist-editor-group-name {
  padding: 0 !important;
  margin: 0 !important;
  min-height: 0 !important;
  height: 1.5rem;
  line-height: 1.5rem;
  vertical-align: middle;
  box-sizing: border-box;
  align-self: stretch;
}

.sortable-list .checklist-editor-group__name:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
  background: var(--color-surface);
}

.sortable-list .checklist-editor-group__toggle {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  padding: 0;
  border: none;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--duration-fast) var(--ease-default), background var(--duration-fast) var(--ease-default);
}

.sortable-list .checklist-editor-group__toggle:hover {
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.sortable-list .checklist-editor-group__chevron {
  font-size: 0.75rem;
  transition: transform var(--duration-normal) var(--ease-default);
}

.sortable-list .checklist-editor-group__remove,
.sortable-list .checklist-editor-group__add-item {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  padding: 0;
  border: none;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  line-height: 1;
  transition: color var(--duration-fast) var(--ease-default), background var(--duration-fast) var(--ease-default);
}

.sortable-list .checklist-editor-group__remove:hover,
.sortable-list .checklist-editor-group__add-item:hover {
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.sortable-list .checklist-editor-group__add-item {
  font-size: 1.25rem;
}

.sortable-list .checklist-editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-top: 0;
  margin-bottom: 0;
}

.sortable-list .checklist-editor-toolbar__btn {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-default), background var(--duration-fast) var(--ease-default), border-color var(--duration-fast) var(--ease-default), box-shadow var(--duration-fast) var(--ease-default);
}

.sortable-list .checklist-editor-toolbar__btn:hover {
  background: color-mix(in srgb, var(--color-text) 4%, transparent);
  border-color: color-mix(in srgb, var(--color-text) 15%, transparent);
}

.sortable-list .checklist-editor-toolbar__btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-text);
}

.sortable-list .checklist-editor-toolbar__btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.sortable-list .checklist-editor-group__body {
  padding: 0.125rem var(--space-2);
  transition: opacity var(--duration-normal) var(--ease-default), max-height var(--duration-slow) var(--ease-default);
}

.sortable-list .checklist-editor-group__body--collapsed {
  display: none;
}

.sortable-list .checklist-editor-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Empty group: give the list a hit target so tasks can be dropped into the group */
.sortable-list .checklist-editor-items:empty {
  min-height: 2.75rem;
  box-sizing: border-box;
}

.sortable-list .checklist-editor-items.checklist-editor-items--drop-empty {
  outline: 2px dashed var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-primary) 6%, transparent);
}

.sortable-list .checklist-editor-item {
  margin: 0;
}

.sortable-list .checklist-editor-item .item-short {
  flex: 1;
  min-width: 0;
  margin: 0 !important;
  padding: 0 var(--space-2) !important;
  height: 1.25rem;
  line-height: 1.25rem;
  min-height: 0 !important;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  font-size: var(--text-sm);
  box-sizing: border-box;
}

/* .form-group has margin/padding globally; force zero in list rows */
.sortable-list .host-checklist-edit-list__item .item-short,
.sortable-list .host-checklist-edit-list__item input.form-group,
.sortable-list .host-checklist-edit-list__item input.item-short {
  margin: 0 !important;
  padding: 0 var(--space-2) !important;
  height: 1.25rem !important;
  min-height: 0 !important;
  line-height: 1.25rem !important;
}

.sortable-list .checklist-editor-item .item-short:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
  background: var(--color-surface);
}

.sortable-list .checklist-editor-item__handle {
  flex-shrink: 0;
}

.sortable-list .checklist-editor-item__details-btn {
  flex-shrink: 0;
  font-size: 0.75rem;
  padding: 0 var(--space-2);
  margin: 0;
  height: 1.25rem;
  line-height: 1;
  min-height: 0;
  border-radius: var(--radius-xs);
  background: color-mix(in srgb, var(--color-text) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-text) 15%, transparent);
  color: var(--color-text);
}

.sortable-list .checklist-editor-item__details-btn:hover {
  background: color-mix(in srgb, var(--color-text) 12%, transparent);
  border-color: color-mix(in srgb, var(--color-text) 20%, transparent);
  color: var(--color-text);
}

.sortable-list .host-checklist-edit-list__item--drop-before {
  box-shadow: 0 -2px 0 0 var(--color-primary);
}

.sortable-list .host-checklist-edit-list__item--drop-after {
  box-shadow: 0 2px 0 0 var(--color-primary);
}

.sortable-list .host-checklist-edit-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Item row: single compact row, vertically centered */
.sortable-list .host-checklist-edit-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-2);
  margin: 0 calc(-1 * var(--space-2));
  min-height: 0;
  height: 1.5rem;
  max-height: 1.5rem;
  overflow: hidden;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-default);
}

.sortable-list .host-checklist-edit-list__item:hover {
  background: color-mix(in srgb, var(--color-text) 4%, transparent);
}

.sortable-list .host-checklist-edit-list__item--dragging {
  opacity: 0.6;
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.sortable-list .host-checklist-edit-list__handle {
  cursor: grab;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1;
  user-select: none;
}

.sortable-list .host-checklist-edit-list__handle:active {
  cursor: grabbing;
}

.sortable-list .host-checklist-edit-list__label {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--color-text);
  min-width: 0;
}

.sortable-list .host-checklist-edit-list__remove {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-default), background var(--duration-fast) var(--ease-default);
}

/* Keep list row controls compact so row height stays 1.5rem */
.sortable-list .host-checklist-edit-list__item .host-checklist-edit-list__remove,
.sortable-list .host-checklist-edit-list__item .checklist-editor-item__details-btn {
  margin: 0;
  min-height: 0;
}

.sortable-list .host-checklist-edit-list__remove:hover {
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}

.sortable-list .host-checklist-edit-list + .empty-state {
  font-size: var(--text-sm);
  padding: var(--space-2) 0;
}

}