/* SQL Playground Modern Dark Theme */
:root {
  --bg-dark: #0a0f1d;
  --bg-sidebar: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #090d16;
  --bg-hover: #1e293b;
  --border-color: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-cyan: #38bdf8;
  --accent-blue: #0284c7;
  --accent-teal: #00758f;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #f43f5e;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "Consolas", "Cascadia Code", "Fira Code", "Courier New", monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* App Header */
.app-header {
  height: 52px;
  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;
  z-index: 10;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.3px;
  color: #ffffff;
}

.logo-icon {
  font-size: 1.25rem;
}

.logo-text {
  background: linear-gradient(135deg, #38bdf8, #00758f);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.dataset-selector-box {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  font-size: 0.82rem;
}

.dataset-selector-box label {
  color: var(--text-muted);
  font-weight: 600;
}

.dataset-selector-box select {
  background: transparent;
  color: #ffffff;
  border: none;
  font-size: 0.82rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}

.dataset-selector-box select option {
  background: var(--bg-sidebar);
  color: #ffffff;
}

.safety-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 8px;
  border-radius: 14px;
  font-size: 0.74rem;
  font-weight: 700;
}

.engine-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 14px;
  background: #1e293b;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.engine-badge.ready {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.3);
}

.engine-badge.loading {
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.3);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

.nav-btn {
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.nav-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

/* Main Layout */
.main-layout {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 380px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.2);
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 10px 4px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}

.tab-btn:hover {
  color: #ffffff;
}

.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.06);
}

.tab-pane {
  display: none;
  flex: 1;
  flex-direction: column;
  overflow-y: auto;
}

.tab-pane.active {
  display: flex;
}

/* Schema Explorer Pane */
.sidebar-search-box {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-search-box input, .questions-filter-bar input, .questions-filter-bar select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  color: var(--text-main);
  padding: 6px 9px;
  font-size: 0.78rem;
  outline: none;
}

.sidebar-search-box input:focus, .questions-filter-bar input:focus {
  border-color: var(--accent-cyan);
}

.tables-list {
  padding: 8px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.table-card {
  border: 1px solid var(--border-color);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.table-card-header {
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.table-card-header:hover {
  background: rgba(255, 255, 255, 0.07);
}

.table-name {
  font-weight: 700;
  font-size: 0.8rem;
  color: #e2e8f0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.table-count-badge {
  font-size: 0.68rem;
  background: #334155;
  color: var(--text-muted);
  padding: 1px 6px;
  border-radius: 10px;
}

.table-columns-details {
  padding: 6px 10px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-input);
  display: none;
}

.table-columns-details.open {
  display: block;
}

.col-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  padding: 2.5px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.col-name {
  color: #bae6fd;
  font-family: var(--font-mono);
}

.col-type {
  color: var(--text-dim);
}

.col-pk {
  color: var(--accent-amber);
  font-size: 0.65rem;
  font-weight: 700;
  margin-left: 4px;
}

.table-preview-btn {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 4px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

.table-preview-btn:hover {
  background: rgba(56, 189, 248, 0.2);
}

/* Questions Tab */
.questions-filter-bar {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.questions-list {
  padding: 8px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.question-item {
  border: 1px solid var(--border-color);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.02);
  padding: 8px 10px;
  cursor: pointer;
  transition: all 0.15s;
}

.question-item:hover {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.05);
}

.q-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.q-num {
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.15);
  padding: 1px 6px;
  border-radius: 10px;
}

.q-category-tag {
  font-size: 0.65rem;
  color: var(--text-dim);
}

.q-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: #f1f5f9;
  line-height: 1.25;
}

.q-details {
  display: none;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
  font-size: 0.73rem;
  color: var(--text-muted);
}

.q-details.open {
  display: block;
}

.q-problem {
  margin-bottom: 6px;
  color: #cbd5e1;
}

.q-concepts {
  font-size: 0.68rem;
  color: var(--accent-amber);
  margin-bottom: 8px;
}

.q-actions {
  display: flex;
  gap: 6px;
}

.q-btn {
  padding: 3px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
}

.q-btn-run {
  background: #0284c7;
  color: #ffffff;
}

.q-btn-load {
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  border-color: var(--border-color);
}

/* History Tab */
.history-actions {
  padding: 8px 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.link-btn {
  background: none;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.72rem;
  cursor: pointer;
  text-decoration: underline;
}

.history-list {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
}

.history-item {
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #bae6fd;
  cursor: pointer;
  white-space: pre-wrap;
  word-break: break-all;
  background: var(--bg-input);
}

.history-item:hover {
  border-color: var(--accent-cyan);
}

/* Right Workspace */
.workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--bg-dark);
}

/* Editor Toolbar */
.editor-toolbar {
  height: 44px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 12px;
  flex-shrink: 0;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 5px;
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7, #00758f);
  color: #ffffff;
  border-color: #0369a1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #0369a1, #005a6e);
}

.shortcut-pill {
  font-size: 0.65rem;
  background: rgba(0, 0, 0, 0.25);
  padding: 1px 5px;
  border-radius: 3px;
  color: #bae6fd;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #cbd5e1;
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  min-width: 240px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
  z-index: 100;
  margin-top: 4px;
}

.dropdown-menu.open {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 8px 12px;
  color: #e2e8f0;
  text-decoration: none;
  font-size: 0.74rem;
  font-family: var(--font-mono);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.dropdown-menu a:hover {
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
}

/* SQL Editor */
.editor-container {
  height: 180px;
  background: var(--bg-input);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  flex-shrink: 0;
}

#sqlInput {
  width: 100%;
  height: 100%;
  background: transparent;
  color: #f1f5f9;
  border: none;
  outline: none;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.45;
  resize: vertical;
  min-height: 120px;
  max-height: 400px;
}

/* Safety Warning */
.safety-warning-banner {
  background: rgba(244, 63, 94, 0.12);
  border-bottom: 1px solid rgba(244, 63, 94, 0.3);
  color: #fca5a5;
  padding: 7px 16px;
  font-size: 0.76rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.warning-icon {
  font-size: 1.1rem;
}

/* Results Section */
.results-header {
  height: 36px;
  background: rgba(15, 23, 42, 0.9);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
}

.results-title {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.results-meta {
  display: flex;
  gap: 8px;
}

.meta-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.status-ready {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-muted);
}

.status-success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

.status-error {
  background: rgba(244, 63, 94, 0.15);
  color: #f87171;
  border-color: rgba(244, 63, 94, 0.3);
}

/* Results Data Grid */
.results-container {
  flex: 1;
  overflow: auto;
  position: relative;
  background: var(--bg-dark);
}

.empty-results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  text-align: center;
}

.empty-icon {
  font-size: 2.8rem;
  margin-bottom: 8px;
  opacity: 0.7;
}

.empty-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.empty-results-placeholder p {
  font-size: 0.8rem;
}

/* Data Table */
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-align: left;
}

table.data-table th {
  position: sticky;
  top: 0;
  background: #1e293b;
  color: #38bdf8;
  font-weight: 700;
  padding: 7px 12px;
  border-bottom: 2px solid var(--border-color);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  white-space: nowrap;
  z-index: 2;
}

table.data-table td {
  padding: 6px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  border-right: 1px solid rgba(255, 255, 255, 0.03);
  color: #f1f5f9;
  white-space: nowrap;
}

table.data-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.015);
}

table.data-table tr:hover td {
  background: rgba(56, 189, 248, 0.06);
}

.null-badge {
  color: #64748b;
  font-style: italic;
  font-size: 0.7rem;
}

/* Error Banner in Results */
.query-error-box {
  padding: 16px;
  margin: 16px;
  border-radius: 6px;
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fca5a5;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.4;
}

.query-error-title {
  font-weight: 700;
  color: #f43f5e;
  margin-bottom: 4px;
}

/* Pagination Bar */
.pagination-bar {
  height: 38px;
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-nav-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: #e2e8f0;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
}

.page-nav-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
}

.page-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

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

::-webkit-scrollbar-thumb:hover {
  background: #475569;
}