:root {
  color-scheme: dark;
  --bg-app: #0d1117;
  --bg-sidebar: #161b22;
  --bg-surface: #1a202c;
  --bg-pane-header: #161b22;
  --bg-hover: #21262d;
  --bg-active: rgba(56, 139, 253, 0.15);
  --border-color: #30363d;
  --border-subtle: #21262d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-primary: #238636;
  --accent-primary-hover: #2ea043;
  --accent-blue: #1f6feb;
  --accent-blue-hover: #388bfd;
  --accent-amber: #d29922;
  --accent-green: #3fb950;
  --accent-purple: #a371f7;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   2. App Layout: Full Screen CSS Grid (250px Sidebar + 1fr Main Content Area)
   ========================================================================== */
.app-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* ==========================================================================
   3. Left Sidebar: Lakehouse Explorer (Unity Catalog Tree)
   ========================================================================== */
.sidebar {
  width: 250px;
  height: 100vh;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  user-select: none;
  overflow: hidden;
  z-index: 10;
}

.sidebar-header {
  height: 48px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-sidebar);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-icon {
  color: var(--accent-blue);
  font-size: 14px;
}

.sidebar-heading {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.icon-action-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  width: 28px;
  height: 28px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.icon-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.catalog-scope {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.15);
}

.catalog-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #21262d;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2px 8px;
  font-size: 11px;
  font-family: var(--font-mono);
}

.catalog-chip i {
  color: var(--accent-blue);
  font-size: 10px;
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px 0;
}

.sidebar-content::-webkit-scrollbar {
  width: 6px;
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

/* Tree DOM Hierarchy Styling */
.tree-root, .tree-children {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tree-node {
  margin: 0;
  padding: 0;
}

.tree-row {
  display: flex;
  align-items: center;
  height: 28px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background 0.1s, color 0.1s;
  padding-right: 8px;
  position: relative;
  white-space: nowrap;
}

.tree-row:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.tree-row.active-node {
  background-color: var(--bg-active);
  color: #58a6ff;
  font-weight: 500;
}

.tree-row.active-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--accent-blue);
}

/* Indentation levels */
.tree-row.level-0 {
  padding-left: 8px;
}

.tree-row.level-1 {
  padding-left: 20px;
}

.tree-row.level-2 {
  padding-left: 36px;
}

.tree-toggle {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.tree-toggle.expanded {
  transform: rotate(90deg);
}

.tree-toggle-spacer {
  width: 18px;
  flex-shrink: 0;
}

.tree-branch {
  color: var(--text-muted);
  font-size: 11px;
  margin-right: 4px;
  flex-shrink: 0;
  font-family: var(--font-mono);
}

.tree-icon {
  margin-right: 6px;
  font-size: 12px;
  flex-shrink: 0;
}

.tree-icon.layer-icon {
  color: #58a6ff;
}

.tree-icon.folder-icon {
  color: #e3b341;
}

.tree-icon.table-icon {
  color: #bc8cff;
}

.tree-icon.file-icon {
  color: #3fb950;
}

.tree-label {
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 12px;
  font-family: var(--font-mono);
}

.tree-node-loading {
  padding: 4px 12px 4px 28px;
  color: var(--text-muted);
  font-size: 11px;
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-footer {
  border-top: 1px solid var(--border-color);
  padding: 8px 12px;
  background: var(--bg-sidebar);
}

.sidebar-status {
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.status-icon {
  color: var(--accent-blue);
  font-size: 12px;
  margin-top: 2px;
}

.status-msg {
  margin: 0;
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 1.4;
  word-break: break-word;
}

/* ==========================================================================
   4. Main Content Area (Flex Column)
   ========================================================================== */
.main-content {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-width: 0;
  overflow: hidden;
  background-color: var(--bg-app);
}

/* 4.1 Top Bar */
.top-bar {
  height: 48px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.workspace-identity {
  display: flex;
  align-items: center;
  gap: 8px;
}

.workspace-logo {
  color: #f0883e;
  font-size: 14px;
}

.workspace-title {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.portal-tabs {
  display: flex;
  gap: 4px;
}

.portal-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
}

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

.portal-tab.active {
  background: #21262d;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.auth-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.auth-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 12px;
  background: #21262d;
  border: 1px solid var(--border-color);
  font-size: 11px;
  color: var(--text-secondary);
}

.auth-indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #6e7681;
}

.auth-pill.authenticated .auth-indicator-dot {
  background: var(--accent-green);
  box-shadow: 0 0 6px rgba(63, 185, 80, 0.6);
}

.auth-pill.authenticated {
  color: #7ee787;
}

.action-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  line-height: 18px;
}

.btn-primary {
  background-color: var(--accent-primary);
  border-color: rgba(240, 246, 252, 0.1);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
}

.btn-secondary {
  background-color: #21262d;
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: #30363d;
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.btn-icon {
  background-color: #21262d;
  border-color: var(--border-color);
  color: var(--text-secondary);
  padding: 5px 8px;
}

.btn-icon:hover {
  background-color: #30363d;
  color: var(--text-primary);
}

.btn-sm {
  padding: 3px 8px;
  font-size: 11px;
}

.kbd-shortcut {
  background: rgba(0, 0, 0, 0.25);
  border-radius: 3px;
  padding: 1px 4px;
  font-size: 10px;
  font-family: var(--font-mono);
  margin-left: 4px;
}

/* Token Popover */
.token-popover-container {
  position: relative;
}

.token-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 280px;
  background: #1c2128;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  z-index: 100;
}

.token-popover.hidden {
  display: none;
}

.popover-title {
  font-weight: 600;
  font-size: 12px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.popover-body {
  display: flex;
  gap: 6px;
}

.popover-body input {
  flex: 1;
  background: #0d1117;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 11px;
  font-family: var(--font-mono);
}

.popover-body input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

/* ==========================================================================
   5. Main Tab Panels
   ========================================================================== */
.tab-panel {
  display: none;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.tab-panel.active {
  display: flex;
  flex-direction: column;
}

/* 5.1 Top Pane: Monaco Editor Container */
.top-pane {
  flex: 0 0 40%;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  background: #0d1117;
  overflow: hidden;
}

.pane-header {
  height: 34px;
  background-color: var(--bg-pane-header);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  user-select: none;
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 12px;
  color: var(--text-primary);
}

.pane-icon {
  color: var(--accent-blue);
  font-size: 12px;
}

.active-layer-tag {
  background: #21262d;
  color: #79c0ff;
  border: 1px solid rgba(56, 139, 253, 0.4);
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 10px;
}

.pane-hints, .pane-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hint-text {
  font-size: 11px;
  color: var(--text-muted);
}

.hint-text kbd {
  background: #21262d;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1px 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-secondary);
}

.editor-wrapper {
  flex: 1;
  width: 100%;
  height: 100%;
  min-height: 0;
  position: relative;
}

.monaco-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

/* 5.2 Resizing Divider */
.pane-divider {
  height: 6px;
  background-color: #161b22;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: row-resize;
  flex-shrink: 0;
}

.divider-notch {
  width: 36px;
  height: 2px;
  background-color: var(--border-color);
  border-radius: 1px;
}

/* 5.3 Bottom Pane: AG Grid Results */
.bottom-pane {
  flex: 1;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  background: var(--bg-app);
  overflow: hidden;
}

.query-status-text {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.results-wrapper {
  flex: 1;
  width: 100%;
  height: 100%;
  min-height: 0;
  position: relative;
  overflow: hidden;
}

.results-grid {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

/* ==========================================================================
   6. AG Grid Theme Customization (Seamless Dark IDE Theme)
   ========================================================================== */
.ag-theme-quartz-dark {
  --ag-background-color: #0d1117;
  --ag-header-background-color: #161b22;
  --ag-header-foreground-color: #8b949e;
  --ag-foreground-color: #e6edf3;
  --ag-border-color: #30363d;
  --ag-secondary-border-color: #21262d;
  --ag-row-hover-color: #161b22;
  --ag-selected-row-background-color: rgba(56, 139, 253, 0.15);
  --ag-font-family: var(--font-sans);
  --ag-font-size: 12px;
  --ag-header-height: 32px;
  --ag-row-height: 30px;
}

.ag-theme-quartz-dark .ag-header-cell-label {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #8b949e;
}

.ag-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 12px;
  padding: 40px;
}

.ag-empty-state i {
  font-size: 24px;
  color: #30363d;
}

/* ==========================================================================
   7. Catalog & Lineage Tab (dbt docs iframe)
   ========================================================================== */
.catalog-container {
  flex: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #ffffff;
}

.catalog-container iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}