body {
  background-color: #f5f7fb;
}

.card {
  border-radius: 0.5rem;
}

.table td input.form-control-sm,
.table td select.form-select-sm {
  min-width: 8rem;
}

.circuit-tree-table .section-row td {
  background: #e9eef8;
  border-top: 2px solid #c6d3ea;
  font-weight: 600;
}

.circuit-tree-table .summary-row td {
  background: #f5f8fd;
  font-weight: 600;
}

.circuit-tree-table .device-row td {
  background: #ffffff;
}

.circuit-tree-table .reserve-row td {
  background: #f8fbff;
}

.circuit-tree-table .placeholder-row td {
  background: #f7f7f7;
  color: #6c757d;
  font-style: italic;
}

.circuit-tree-table .indented-cell {
  padding-left: 1.5rem;
}

.tree-editor-shell {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.editor-toolbar {
  display: flex;
  gap: 0.5rem;
  position: relative;
}

.editor-toolbar button {
  border: 1px solid #c4cddc;
  background: #fff;
  padding: 0.28rem 0.6rem;
  border-radius: 4px;
  font-size: 0.82rem;
}

.editor-toolbar button:disabled {
  opacity: 0.45;
}

.column-settings-menu {
  position: absolute;
  z-index: 9;
  margin-top: 2rem;
  border: 1px solid #cfd7e5;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
  padding: 0.45rem;
  width: 300px;
}

.column-settings-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.35rem;
}

.column-settings-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-height: 340px;
  overflow: auto;
}

.column-settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 0.2rem 0.25rem;
}

.column-settings-item.dragging {
  opacity: 0.55;
}

.column-settings-item.drop-target {
  border-color: #2b6cb0;
  background: #ebf4ff;
}

.column-settings-item.locked {
  background: #f7fafc;
}

.column-settings-item label {
  display: flex;
  gap: 0.3rem;
  align-items: center;
  font-size: 0.8rem;
}

.column-settings-order {
  display: flex;
  gap: 0.2rem;
}

.column-settings-order button {
  border: 1px solid #c4cddc;
  background: #fff;
  border-radius: 3px;
  font-size: 0.72rem;
  padding: 0.08rem 0.28rem;
}

.tree-grid-wrap {
  overflow: auto;
  border: 1px solid #d9dee8;
  background: #fff;
}

.tree-editor-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0.75rem;
  min-height: 560px;
}

.project-device-sidebar {
  border: 1px solid #d9dee8;
  background: #fff;
  padding: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.project-device-sidebar h3 {
  margin: 0;
  font-size: 1rem;
}

.project-device-sidebar input,
.project-device-sidebar select {
  width: 100%;
  border: 1px solid #cfd7e5;
  border-radius: 4px;
  padding: 0.25rem 0.35rem;
}

.project-device-list {
  max-height: 360px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.project-device-item {
  border: 1px solid #d5ddec;
  background: #f8faff;
  text-align: left;
  padding: 0.4rem;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  font-size: 0.8rem;
}

.project-device-item.selected {
  border-color: #4c7dd9;
  background: #edf3ff;
}

.project-device-item.dragging {
  opacity: 0.55;
  border-style: dashed;
}

.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidebar-actions label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.82rem;
}

.sidebar-actions button {
  border: 1px solid #c4cddc;
  background: #fff;
  border-radius: 4px;
  padding: 0.3rem 0.45rem;
  font-size: 0.82rem;
}

.tree-grid {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.tree-grid th,
.tree-grid td {
  border: 1px solid #e4e9f2;
  padding: 0.35rem 0.5rem;
  white-space: nowrap;
  vertical-align: middle;
}

.tree-grid th {
  background: #f4f7fb;
  position: sticky;
  top: 0;
  z-index: 2;
  vertical-align: top;
}

.tree-grid .header-cell {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.tree-grid .header-sort-btn,
.tree-grid .header-filter-btn {
  border: 1px solid #c4cddc;
  background: #fff;
  border-radius: 3px;
  font-size: 0.75rem;
  padding: 0.15rem 0.35rem;
}

.tree-grid .header-sort-btn {
  text-align: left;
}

.tree-grid .header-filter-btn.active {
  border-color: #2563eb;
  color: #2563eb;
}

.tree-grid .header-filter-menu {
  position: absolute;
  z-index: 7;
  margin-top: 0.2rem;
  border: 1px solid #cfd7e5;
  background: #fff;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
  width: 220px;
  max-height: 260px;
  overflow: auto;
  padding: 0.35rem;
}

.tree-grid .header-filter-clear {
  border: 1px solid #c4cddc;
  background: #fff;
  border-radius: 3px;
  font-size: 0.72rem;
  padding: 0.12rem 0.3rem;
  margin-bottom: 0.25rem;
}

.tree-grid .header-filter-values {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.tree-grid .header-filter-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 400;
  font-size: 0.75rem;
}

.tree-grid .num {
  text-align: right;
}

.tree-grid .section-row td {
  background: #e8eef8;
  font-weight: 600;
}

.tree-grid .section-drop-cell {
  padding: 0.45rem 0.6rem;
}

.tree-grid .section-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.tree-grid .section-actions {
  display: flex;
  gap: 0.35rem;
}

.tree-grid .section-actions button {
  border: 1px solid #c4cddc;
  background: #fff;
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
  font-size: 0.78rem;
}

.tree-grid .summary-row td {
  background: #f3f7fd;
}

.tree-grid .device-row td:first-child {
  color: #6b7280;
}

.tree-grid .empty-circuit-row td {
  background: #f8fbff;
}

.tree-grid tr.row-selected td {
  background: #eaf1ff;
}

.tree-grid .placeholder-row td {
  background: #f7f7f7;
  color: #6b7280;
  font-style: italic;
}

.tree-grid .cell-editable {
  cursor: text;
}

.tree-grid .device-drag-handle {
  cursor: grab;
}

.tree-grid .device-drag-handle.device-dragging {
  opacity: 0.55;
}

.tree-grid .circuit-drag-handle {
  cursor: grab;
}

.tree-grid .circuit-dragging-block td {
  opacity: 0.55;
}

.tree-grid .cell-selected {
  outline: 2px solid #4c7dd9;
  outline-offset: -2px;
}

.tree-grid input {
  width: 100%;
  min-width: 5rem;
  border: 1px solid #9fb6e0;
  border-radius: 2px;
  padding: 0.2rem 0.3rem;
}

.tree-grid .action-cell {
  display: flex;
  gap: 0.3rem;
}

.tree-grid .action-cell button {
  border: 1px solid #c4cddc;
  background: #fff;
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
  font-size: 0.78rem;
}

.tree-grid .drop-target-active {
  box-shadow: inset 0 0 0 2px #4c7dd9;
  background: #eef4ff !important;
}

.tree-grid .drop-target-invalid {
  box-shadow: inset 0 0 0 2px #d97706;
  background: #fff7ed !important;
}

.tree-grid tr.circuit-insert-before td,
.tree-grid tr.circuit-insert-after td {
  position: relative;
}

.tree-grid tr.circuit-insert-before td::before {
  content: "";
  position: absolute;
  left: -1px;
  right: -1px;
  top: -2px;
  border-top: 4px solid #2563eb;
  pointer-events: none;
}

.tree-grid tr.circuit-insert-before td:first-child::after {
  content: "";
  position: absolute;
  left: -7px;
  top: -7px;
  width: 0;
  height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 10px solid #2563eb;
  pointer-events: none;
}

.tree-grid tr.circuit-insert-after td::after {
  content: "";
  position: absolute;
  left: -1px;
  right: -1px;
  bottom: -2px;
  border-bottom: 4px solid #2563eb;
  pointer-events: none;
}

.tree-grid tr.circuit-insert-after td:first-child::before {
  content: "";
  position: absolute;
  left: -7px;
  bottom: -7px;
  width: 0;
  height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 10px solid #2563eb;
  pointer-events: none;
}

.drop-hint {
  font-size: 0.75rem;
  color: #1f4ea3;
  font-weight: 600;
}

.notice {
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  border: 1px solid transparent;
}

.notice.info {
  background: #ebf3ff;
  border-color: #bad1f7;
}

.notice.error {
  background: #fdecec;
  border-color: #f5b5b5;
}

.notice.muted {
  background: #f6f6f6;
  border-color: #e4e4e4;
}

.todo-hint {
  color: #6b7280;
  font-size: 0.8rem;
  margin: 0;
}

@media (max-width: 1200px) {
  .tree-editor-layout {
    grid-template-columns: 1fr;
  }
}