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

body,
.unified-workspace {
  background: var(--dw-bg);
  color: var(--dw-text);
}

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

/* Global loading overlay */
#workspaceLoadingOverlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 18, 0.55);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
  z-index: 9999;
}

#workspaceLoadingOverlay.visible {
  opacity: 1;
  pointer-events: all;
}

.loading-overlay-card {
  background: linear-gradient(135deg, #0f172a, #111827);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  border-radius: 14px;
  padding: 16px 18px;
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 12px;
  color: #e5e7eb;
  min-width: 240px;
}

.loading-overlay-spinner {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.15);
  border-top-color: #60a5fa;
  animation: spin 0.8s linear infinite;
}

.loading-overlay-text {
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Refined top navigation */
.desktop-menu-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 0.65rem 1rem;
  background: linear-gradient(135deg, #0f172a, #111827);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
  color: #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-logo {
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #e5e7eb;
}

.menu-nav {
  display: grid;
  grid-auto-flow: column;
  gap: 0.5rem;
}

.menu-item {
  position: relative;
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  color: #cbd5e1;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.menu-item:hover {
  background: rgba(255,255,255,0.06);
  color: #f8fafc;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
}

.menu-item.active {
  background: rgba(96,165,250,0.14);
  color: #f8fafc;
  box-shadow: inset 0 0 0 1px rgba(96,165,250,0.35);
}

.menu-dropdown {
  background: #0b1220;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 18px 40px rgba(0,0,0,0.45);
}

/* ============================================
   TOP BAR - Status & Quick Actions
   ============================================ */
.workspace-header {
  display: none !important; /* Hide redundant header - desktop menu bar handles navigation */
}

.workspace-header-left {
  display: grid;
  grid-auto-flow: column;
  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: grid;
  grid-auto-flow: column;
  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: grid;
  grid-auto-flow: column;
  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: grid;
  grid-auto-flow: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.workspace-header-right {
  display: grid;
  grid-auto-flow: column;
  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: grid;
  place-items: 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 - Professional 3-Pane Layout
   ============================================ */
.workspace-grid {
  display: grid;
  grid-template-columns: minmax(240px, 280px) 1fr minmax(280px, 320px);
  flex: 1;
  transition: grid-template-columns 0.2s ease;
  position: relative;
  min-height: 0;
  height: auto;
  background: var(--bg-primary, #0d1117);
  overflow: visible;
}

/* Responsive breakpoints */
@media (max-width: 1400px) {
  .workspace-grid {
    grid-template-columns: minmax(220px, 260px) 1fr minmax(260px, 300px);
  }
}

@media (max-width: 1200px) {
  .workspace-grid {
    grid-template-columns: minmax(200px, 240px) 1fr minmax(240px, 280px);
  }
}

@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 0px 1fr minmax(200px, 260px);
  }
  
  .workspace-grid.sidebar-right-collapsed {
    grid-template-columns: 0px 1fr 0px;
  }
}

.workspace-grid.sidebar-left-collapsed {
  grid-template-columns: 0px 1fr minmax(280px, 320px);
}

.workspace-grid.sidebar-right-collapsed {
  grid-template-columns: minmax(240px, 280px) 1fr 0px;
}

.workspace-grid.both-collapsed {
  grid-template-columns: 0px 1fr 0px;
}

@media (max-width: 1400px) {
  .workspace-grid.sidebar-left-collapsed {
    grid-template-columns: 0px 1fr minmax(260px, 300px);
  }
  .workspace-grid.sidebar-right-collapsed {
    grid-template-columns: minmax(220px, 260px) 1fr 0px;
  }
}

@media (max-width: 1200px) {
  .workspace-grid.sidebar-left-collapsed {
    grid-template-columns: 0px 1fr minmax(240px, 280px);
  }
  .workspace-grid.sidebar-right-collapsed {
    grid-template-columns: minmax(200px, 240px) 1fr 0px;
  }
}

/* ============================================
   LEFT SIDEBAR - Dataset Browser
   ============================================ */
.workspace-sidebar-left {
  grid-column: 1;
  grid-row: 1;
  background: var(--bg-secondary, #161b22);
  border-right: 1px solid var(--border-primary, #30363d);
  display: grid;
  grid-template-rows: auto auto auto 1fr;
  overflow: auto;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
}

.sidebar-nav {
  overflow-y: auto;
  padding: var(--spacing-sm, 0.75rem);
  border-bottom: 1px solid var(--color-border);
  max-height: 50%;
}

.workspace-sidebar-left.collapsed {
  display: none;
}

.sidebar-upload-section {
  padding: 0.5rem;
  background: var(--color-bg, #0d1117);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-sample-section {
  padding: 0.5rem;
  background: var(--color-bg, #0d1117);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-upload-header {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted, #8b949e);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   RIGHT SIDEBAR - Tool Palette
   ============================================ */
.workspace-sidebar-right {
  grid-column: 3;
  grid-row: 1;
  background: var(--bg-secondary, #161b22);
  border-left: 1px solid var(--border-primary, #30363d);
  display: grid;
  grid-template-rows: 1fr;
  /* overflow: hidden;  <-- Remove this */
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
}

.workspace-sidebar-right.collapsed {
  display: none;
}

/* Legacy sidebar (keep for compatibility) */
.workspace-sidebar {
  grid-column: 1;
  grid-row: 1;
  background: var(--bg-secondary, #161b22);
  border-right: 1px solid var(--border-primary, #30363d);
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 280px;
  max-width: 360px;
}

.workspace-sidebar.collapsed {
  display: none;
}

.sidebar-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 0.75rem 0.75rem 0.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.sidebar-title {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  font-size: 0.95rem;
}

.sidebar-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.sidebar-actions {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 0.25rem;
}

.sidebar-scroll {
  overflow-y: auto;
}

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

.sidebar-section-header {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  padding: 0.4rem 0.6rem;
  background: var(--color-bg);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
  margin: 0.1rem;
  gap: 0.5rem;
}

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

.sidebar-section-icon {
  font-size: 0.875rem;
  opacity: 0.7;
}

.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;
  flex: 1;
}

.sidebar-section-badge {
  display: grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 0.375rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.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: none;
  overflow-y: auto;
  padding: 0.25rem 0.4rem;
}

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

/* Sidebar Search */
.sidebar-search {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.sidebar-search-input {
  width: 100%;
  padding: 0.375rem 0.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.8125rem;
  outline: none;
  transition: all var(--transition-base);
}

.sidebar-search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.1);
}

.sidebar-search-clear {
  padding: 0.25rem 0.5rem;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  line-height: 1;
  transition: all var(--transition-base);
}

.sidebar-search-clear:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.sidebar-nav {
  overflow-y: auto;
  padding: 0.375rem 0.5rem;
  display: grid;
  grid-auto-rows: min-content;
  gap: 0.25rem;
}

.nav-tool {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  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: 0.75rem;
  min-height: 28px;
  margin: 0.1rem 0;
}

.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: 0.75rem;
  flex-shrink: 0;
  width: 16px;
  text-align: center;
  opacity: 0.8;
}

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

/* Dataset List in Sidebar */
.dataset-list-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  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: 2;
  grid-row: 1;
  display: grid;
  grid-template-rows: auto auto 1fr;
  background: var(--bg-primary, #0d1117);
  position: relative;
  width: 100%;
  min-height: 0;
}

.dataset-view-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: var(--spacing-lg, 1.25rem) var(--spacing-xl, 2rem);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-bg-light, #161b22) 0%, var(--color-bg, #0d1117) 100%);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.dataset-view-title h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.dataset-view-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs, 0.5rem);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, auto));
  align-items: center;
  gap: var(--spacing-sm, 0.75rem);
}

.dataset-view-actions {
  display: grid;
  grid-auto-flow: column;
  gap: var(--spacing-sm, 0.75rem);
  align-items: center;
}

.dataset-view-actions .header-btn {
  padding: var(--spacing-sm, 0.625rem) var(--spacing-md, 1rem);
  border-radius: var(--radius-md, 6px);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-base, 0.2s);
  border: 1px solid var(--border-primary, #30363d);
  background: var(--bg-tertiary, #1c2128);
}

.dataset-view-actions .header-btn:hover {
  background: var(--bg-elevated, #21262d);
  border-color: var(--accent-primary, #58a6ff);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(88, 166, 255, 0.15);
}

.dataset-view-tabs {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  background: var(--color-bg-light, #161b22);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--spacing-lg, 1.5rem);
  flex-shrink: 0;
  overflow-x: auto;
  gap: var(--spacing-xs, 0.25rem);
}

.dataset-tab {
  padding: var(--spacing-md, 0.875rem) var(--spacing-lg, 1.25rem);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--color-text-muted, #8b949e);
  cursor: pointer;
  transition: all var(--transition-base, 0.2s);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  margin-bottom: -1px;
}

.dataset-tab:hover {
  color: var(--color-text, #e6edf3);
  background: rgba(88, 166, 255, 0.08);
}

.dataset-tab.active {
  color: var(--color-primary, #58a6ff);
  border-bottom-color: var(--color-primary, #58a6ff);
  background: transparent;
  font-weight: 600;
}

.dataset-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-bg, #0d1117);
}

.dataset-view-content {
  display: grid;
  grid-template-rows: 1fr;
  overflow-y: auto;
  overflow-x: auto;
  background: var(--color-bg, #0d1117);
  min-height: 0;
  position: relative;
}

/* Hide tool wrappers when dataset view is active */
.dataset-view-header:not([style*="display: none"]) ~ .dataset-view-content .tool-wrapper,
.dataset-view-header:not([style*="display: none"]) ~ .dataset-view-content .tool-component-wrapper {
  display: none !important;
}

/* Hide dataset view sections when tools are active */
.dataset-view-content:has(.tool-wrapper.active) .dataset-overview,
.dataset-view-content:has(.tool-wrapper.active) .dataset-columns-view,
.dataset-view-content:has(.tool-wrapper.active) .dataset-preview-view,
.dataset-view-content:has(.tool-wrapper.active) .dataset-quality-view,
.dataset-view-content:has(.tool-wrapper.active) .dataset-warnings-view {
  display: none !important;
}

.dataset-view-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border, #30363d), transparent);
  pointer-events: none;
}

.workflow-builder-tab {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  z-index: 2;
  display: grid;
  grid-template-rows: auto 1fr;
  box-sizing: border-box;
  grid-column: 2;
  grid-row: 1;
}

.workspace-tabs {
  display: grid;
  grid-auto-flow: column;
  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: grid;
  grid-auto-flow: column;
  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: grid;
  place-items: center;
}

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

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

.workspace-tab.dragging {
  opacity: 0.5;
  cursor: grabbing;
}

.workspace-tab-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
  flex-shrink: 0;
  transition: background var(--transition-base);
}

.workspace-tab-status[data-status="ready"] {
  background: #22c55e;
}

.workspace-tab-status[data-status="loading"] {
  background: var(--color-primary);
  animation: pulse 1.5s ease-in-out infinite;
}

.workspace-tab-status[data-status="error"] {
  background: #ef4444;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Tab Context Menu */
.tab-context-menu {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  padding: 0.25rem 0;
  min-width: 180px;
  z-index: 10000;
}

.context-menu-item {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-base);
}

.context-menu-item:hover {
  background: var(--color-bg-hover);
}

.context-menu-separator {
  height: 1px;
  background: var(--color-border);
  margin: 0.25rem 0;
}

.tool-viewport {
  flex: 1;
  background: var(--color-bg);
  display: grid;
  grid-template-rows: 1fr;
  min-height: 0;
  /* overflow-y: auto; <-- Remove this */
  width: 100%;
}

.tool-empty-state {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 3rem 2rem;
}

.empty-state-content {
  text-align: center;
  max-width: 600px;
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  opacity: 0.6;
}

.tool-empty-state h3 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.75rem 0;
}

.empty-state-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0 0 2rem 0;
}

.empty-state-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, auto));
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.btn-empty-action {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-empty-action:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-empty-action.primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

.btn-empty-action.primary:hover {
  background: var(--color-primary-hover, var(--color-primary));
  box-shadow: 0 4px 12px rgba(74, 158, 255, 0.3);
}

.empty-state-quick-tips {
  text-align: left;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 2rem;
}

.empty-state-quick-tips h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 1rem 0;
}

.empty-state-quick-tips ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-auto-rows: minmax(0, auto);
  gap: 0.75rem;
}

.empty-state-quick-tips li {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 0.5rem;
}

.empty-state-quick-tips kbd {
  padding: 0.25rem 0.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: var(--color-text);
}

.tool-wrapper {
  width: 100% !important;
  min-height: 0;
  display: none;
  display: grid;
  grid-template-rows: 1fr;
}

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

/* .tool-wrapper.tool-component-wrapper { } */

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

.properties-header {
  display: grid;
  grid-template-columns: 1fr auto;
  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: grid;
  place-items: 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: grid;
  grid-auto-rows: minmax(0, auto);
  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: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 0.25rem 0.5rem;
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  min-height: 20px;
  flex-shrink: 0;
}

.status-bar-left,
.status-bar-right {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 0.5rem;
}

.status-bar-item {
  display: grid;
  grid-auto-flow: column;
  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);
}

.status-quality {
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.status-quality.quality-excellent {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
}

.status-quality.quality-good {
  background: rgba(96, 165, 250, 0.15);
  color: #60a5fa;
}

.status-quality.quality-fair {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
}

.status-quality.quality-poor {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

.status-bar-spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  margin-right: 0.5rem;
}

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

.status-bar-btn {
  padding: 0.25rem 0.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 0.25rem;
}

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

/* ============================================
   TOOL PALETTE - Hide emojis for professional look
   ============================================ */
.tool-palette-container .category-icon,
.tool-palette-container .tool-icon {
  display: none;
}

.tool-palette-item {
  padding-left: 0.6rem !important; /* Adjust padding since icon is hidden */
}

.tool-category-header {
  padding-left: 0.6rem !important; /* Adjust padding since icon is hidden */
}

/* ============================================
   TOOL LOADING
   ============================================ */
.tool-loading {
  display: grid;
  place-items: 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: 280px 1fr;
  }
}

@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  
  .workspace-sidebar {
    position: absolute;
    z-index: 20;
    height: 100%;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
  
  .workspace-grid.sidebar-collapsed .workspace-sidebar {
    display: none;
  }
  
  .workspace-main,
  .workflow-builder-tab {
    grid-column: 1 / -1;
  }
}

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