/* ─── Design Tab Layout ─── */
.design-tab {
  display: flex;
  gap: 0;
  height: calc(100vh - 160px);
  background: var(--color-bg);
}

/* ─── Sol Panel: Feature List ─── */
.design-tab__sidebar {
  width: 240px;
  min-width: 240px;
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
}

.design-tab__sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
}

.design-tab__sidebar-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.design-tab__add-feature-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: none;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  transition: background 0.15s;
}

.design-tab__add-feature-btn:hover {
  background: var(--color-primary-hover);
}

.design-tab__feature-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.design-tab__feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text);
  transition: background 0.15s;
  position: relative;
}

.design-tab__feature-item:hover {
  background: var(--color-hover);
}

.design-tab__feature-item--active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 500;
}

.design-tab__feature-item-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--color-text-tertiary);
  background: var(--color-hover);
  padding: 2px 8px;
  border-radius: 10px;
}

.design-tab__feature-item--active .design-tab__feature-item-count {
  background: rgba(0, 122, 255, 0.15);
}

.design-tab__feature-actions {
  display: none;
  gap: 4px;
  margin-left: auto;
}

.design-tab__feature-item:hover .design-tab__feature-actions {
  display: flex;
}

.design-tab__feature-item:hover .design-tab__feature-item-count {
  display: none;
}

.design-tab__feature-action-btn {
  width: 24px;
  height: 24px;
  border: none;
  background: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.design-tab__feature-action-btn:hover {
  background: var(--color-hover);
  color: var(--color-text);
}

.design-tab__feature-action-btn--danger:hover {
  color: var(--color-danger);
}

/* Feature DnD */
.design-tab__feature-item--dragging {
  opacity: 0.4;
}

.design-tab__drop-indicator {
  height: 2px;
  background: var(--color-primary, #007AFF);
  border-radius: 1px;
  margin: 0 8px;
}

/* Feature inline rename input */
.design-tab__feature-rename-input {
  flex: 1;
  font-size: 14px;
  padding: 2px 6px;
  border: 1px solid var(--color-primary);
  border-radius: 4px;
  outline: none;
  background: var(--color-surface);
  color: var(--color-text);
}

/* ─── Sag Panel: Item'lar ─── */
.design-tab__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.design-tab__main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
}

.design-tab__main-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.design-tab__add-item-group {
  display: flex;
  gap: 8px;
}

.design-tab__add-item-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

.design-tab__add-item-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.design-tab__add-item-btn svg {
  flex-shrink: 0;
}

/* Item Kartlari */
.design-tab__items {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  align-content: start;
}

.design-tab__item-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.design-tab__item-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

.design-tab__item-thumbnail {
  height: 140px;
  background: #F5F5F7;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  font-size: 36px;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.design-tab__item-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.design-tab__item-card-body {
  padding: 14px 16px;
}

.design-tab__item-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.design-tab__item-card-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.design-tab__item-card-type {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.design-tab__item-card-type--text {
  background: #E3F2FD;
  color: #1565C0;
}

.design-tab__item-card-type--whiteboard {
  background: #F3E5F5;
  color: #7B1FA2;
}

.design-tab__item-card-type--flowchart {
  background: #E8F5E9;
  color: #2E7D32;
}

.design-tab__item-card-date {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.design-tab__item-card-actions {
  display: none;
  position: absolute;
  top: 8px;
  right: 8px;
  gap: 4px;
}

.design-tab__item-card:hover .design-tab__item-card-actions {
  display: flex;
}

/* Empty state */
.design-tab__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-tertiary);
  text-align: center;
  padding: 40px;
}

.design-tab__empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.design-tab__empty-text {
  font-size: 15px;
  max-width: 300px;
  line-height: 1.5;
}

/* No feature selected */
.design-tab__no-selection {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  font-size: 15px;
}

/* ─── Editor Overlay (Content area full) ─── */
.design-editor-overlay {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 140px); /* topbar(56) + breadcrumb(~40) + tabs(~44) */
  background: var(--color-bg);
}

.design-editor-overlay__topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.design-editor-overlay__back-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: none;
  cursor: pointer;
  color: var(--color-text);
  font-size: 13px;
  flex-shrink: 0;
}

.design-editor-overlay__back-btn:hover {
  background: var(--color-hover);
}

.design-editor-overlay__title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.design-editor-overlay__title-input {
  font-size: 15px;
  font-weight: 500;
  border: none;
  outline: none;
  background: none;
  color: var(--color-text);
  text-align: center;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.design-editor-overlay__title-input:focus {
  border-bottom: 2px solid var(--color-primary);
}

.design-editor-overlay__actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.design-editor-overlay__save-wiki-btn {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: none;
  cursor: pointer;
  color: var(--color-text);
  font-size: 13px;
  white-space: nowrap;
}

.design-editor-overlay__save-wiki-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.design-editor-overlay__content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}