/* ============================================
   Professional Data Science Workspace Layout
   Inspired by Jupyter, VS Code Data Wrangler, Tableau, RStudio
   But BETTER - optimized for data exploration workflows
   ============================================ */

.unified-workspace {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  height: 100%;
  background: var(--color-bg);
}

/* ============================================
   TOP BAR - Status & Quick Actions
   ============================================ */
.workspace-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  padding: 0.375rem 0.75rem;
  background: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border);
  gap: 0.75rem;
  min-height: 36px;
  flex-shrink: 0;
}

.workspace-header-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.workspace-title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  margin: 0;
  white-space: nowrap;
}

.workspace-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.breadcrumb-item {
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.breadcrumb-item.active {
  background: rgba(74, 158, 255, 0.1);
  color: var(--color-primary);
}

.active-dataset-indicator {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.5rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.active-dataset-indicator.has-dataset {
  background: rgba(74, 158, 255, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

.active-dataset-indicator.has-dataset .indicator-dot {
  background: var(--color-primary);
  box-shadow: 0 0 4px rgba(74, 158, 255, 0.6);
}

.workspace-header-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.workspace-header-right {
  display: flex;
  gap: 0.25rem;
  flex-shrink: 0;
}

.header-btn {
  padding: 0.25rem 0.5rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.8125rem;
  line-height: 1.4;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.header-btn:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.header-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ============================================
   MAIN WORKSPACE - Three Panel Layout
   ============================================ */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr;
  flex: 1;
  transition: grid-template-columns 0.2s ease;
  position: relative;
  min-height: 0;
}

/* ============================================
   LEFT SIDEBAR - Data Browser & Tools
   ============================================ */
.workspace-sidebar {
  grid-column: 1;
  grid-row: 1;
  background: var(--color-bg-light);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.sidebar-section {
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--color-bg);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-base);
}

.sidebar-section-header:hover {
  background: var(--color-bg-hover);
}

.sidebar-section-header h4 {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-section-toggle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.sidebar-section.collapsed .sidebar-section-toggle {
  transform: rotate(-90deg);
}

.sidebar-section-content {
  max-height: 300px;
  overflow-y: auto;
  padding: 0.25rem;
}

.sidebar-section.collapsed .sidebar-section-content {
  display: none;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.nav-tool {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.5rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.8125rem;
  min-height: 32px;
}

.nav-tool:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-hover);
}

.nav-tool.active {
  background: rgba(74, 158, 255, 0.12);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.nav-tool-icon {
  font-size: 0.875rem;
  flex-shrink: 0;
  width: 18px;
  text-align: center;
}

.nav-tool-name {
  flex: 1;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* Dataset List in Sidebar */
.dataset-list-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.5rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.8125rem;
  min-height: 32px;
}

.dataset-list-item:hover {
  background: var(--color-bg-hover);
}

.dataset-list-item.active {
  background: rgba(74, 158, 255, 0.12);
  border-color: var(--color-primary);
}

.dataset-list-item-name {
  flex: 1;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--color-text);
}

.dataset-list-item.active .dataset-list-item-name {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.dataset-list-item-badge {
  font-size: 0.6875rem;
  padding: 0.125rem 0.375rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

/* ============================================
   CENTER - Tabbed Workspace (Like VS Code)
   ============================================ */
.workspace-main {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  position: relative;
  width: 100%;
}

.workflow-builder-tab {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  z-index: 10;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.workspace-tabs {
  display: flex;
  align-items: center;
  background: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  overflow-y: hidden;
  flex-shrink: 0;
  min-height: 36px;
}

.workspace-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border-right: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.8125rem;
  white-space: nowrap;
  min-width: 120px;
  max-width: 200px;
  position: relative;
}

.workspace-tab:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.workspace-tab.active {
  background: var(--color-bg);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: -1px;
}

.workspace-tab-icon {
  font-size: 0.875rem;
  flex-shrink: 0;
}

.workspace-tab-name {
  flex: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.workspace-tab-close {
  padding: 0.125rem;
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: all var(--transition-base);
  font-size: 0.875rem;
  line-height: 1;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.workspace-tab:hover .workspace-tab-close {
  opacity: 1;
}

.workspace-tab-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-danger);
}

.tool-viewport {
  flex: 1;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  width: 100%;
}

.tool-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 300px;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--spacing-lg);
}

.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.3;
}

.tool-empty-state h3 {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  font-weight: var(--font-weight-medium);
}

.tool-empty-state p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.tool-wrapper {
  width: 100% !important;
  min-height: 0;
  display: none;
  flex-direction: column;
  flex: 1;
}

.tool-wrapper.active {
  display: flex;
}

.tool-wrapper.tool-component-wrapper {
  overflow-y: auto;
  overflow-x: hidden;
  width: 100% !important;
}

/* ============================================
   RIGHT PANEL - Properties & Data Preview
   ============================================ */
.workspace-properties {
  display: none;
}

.properties-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  min-height: 36px;
}

.properties-header h3 {
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.properties-close {
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.properties-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-primary);
}

.properties-content {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.properties-section {
  flex-shrink: 0;
}

.properties-section-header {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.375rem;
  padding: 0.25rem 0.5rem;
}

/* Data Grid Preview */
.data-grid-container {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  max-height: 300px;
}

.data-grid {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
}

.data-grid th {
  background: var(--color-bg-light);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  padding: 0.375rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1;
}

.data-grid td {
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  white-space: nowrap;
  text-overflow: ellipsis;
  max-width: 150px;
}

.data-grid tbody tr:hover {
  background: var(--color-bg-hover);
}

.data-grid tbody tr:nth-child(even) {
  background: var(--color-bg-light);
}

/* ============================================
   BOTTOM STATUS BAR
   ============================================ */
.workspace-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0.75rem;
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  min-height: 24px;
  flex-shrink: 0;
}

.status-bar-left,
.status-bar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-bar-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.status-bar-item-label {
  color: var(--color-text-muted);
}

.status-bar-item-value {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   TOOL LOADING
   ============================================ */
.tool-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 300px;
  color: var(--color-text-muted);
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid rgba(74, 158, 255, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   RESPONSIVE - Full width main content (no sidebars)
   ============================================ */
@media (max-width: 1200px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  
  .tool-component-wrapper {
    padding: 0.5rem;
  }
}