:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --info: #0891b2;
    --bg-dark: #1e293b;
    --bg-sidebar: #0f172a;
    --bg-main: #f1f5f9;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --text: #334155;
    --text-light: #94a3b8;
    --text-white: #f8fafc;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
}

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

body {
    font-family: var(--font);
    background: var(--bg-main);
    color: var(--text);
    overflow: hidden;
    height: 100vh;
}

/* Login Screen */
.login-screen {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
}

.login-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.login-header h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
}

/* Layout */
.app-layout {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    color: var(--text-white);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.3s, margin-left 0.3s;
    overflow: hidden;
}

.sidebar.collapsed {
    margin-left: -260px;
}

/* Toggle sidebar button */
.sidebar-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.sidebar-toggle:hover {
    background: var(--bg-main);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header .logo {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

.sidebar-header h1 {
    font-size: 16px;
    font-weight: 600;
}

.sidebar-header small {
    font-size: 11px;
    color: var(--text-light);
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 14px;
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-white);
}

.nav-item.active {
    background: rgba(37, 99, 235, 0.15);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
    margin: 8px 20px;
}

/* Main content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.topbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 56px;
}

.topbar h2 {
    font-size: 18px;
    font-weight: 600;
}

.content-area {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px;
}

/* Panels */
.panel { display: none; }
.panel.active { display: block; }

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    overflow: hidden;
    min-width: 0;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: var(--font);
    transition: border-color 0.2s;
    background: var(--bg-card);
    color: var(--text);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

select.form-control {
    appearance: auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
}

.btn svg { width: 16px; height: 16px; }

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

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #15803d; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }

.btn-warning { background: var(--warning); color: white; }
.btn-warning:hover { background: #b45309; }

.btn-secondary { background: var(--secondary); color: white; }
.btn-secondary:hover { background: #475569; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover {
    background: var(--bg-main);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-group {
    display: flex;
    gap: 8px;
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    background: var(--bg-main);
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    color: var(--secondary);
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table tr:hover td {
    background: rgba(37, 99, 235, 0.03);
}

.table-container {
    overflow: auto;
    max-height: 500px;
    max-width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.data-table {
    width: max-content;
    min-width: 100%;
}

/* Connection cards grid */
.conn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

.conn-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.2s;
    cursor: default;
}

.conn-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.conn-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.conn-card-header h4 {
    font-size: 15px;
    font-weight: 600;
}

.driver-badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.driver-badge.mysql {
    background: #dbeafe;
    color: #1d4ed8;
}

.driver-badge.sqlsrv {
    background: #fef3c7;
    color: #b45309;
}

.conn-detail {
    font-size: 13px;
    color: var(--secondary);
    margin-bottom: 4px;
}

.conn-actions {
    display: flex;
    gap: 8px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

/* SQL Editor */
.sql-editor-container {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 16px;
}

.sql-editor {
    width: 100%;
    min-height: 180px;
    padding: 16px;
    border: none;
    font-family: var(--mono);
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    background: #1e293b;
    color: #e2e8f0;
    outline: none;
    tab-size: 4;
}

.sql-editor::placeholder {
    color: #64748b;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

/* Status bar */
.status-bar {
    padding: 8px 16px;
    background: var(--bg-main);
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--secondary);
    display: flex;
    justify-content: space-between;
}

/* Browser tree */
.tree-container {
    font-size: 13px;
}

.tree-node {
    padding: 6px 0;
}

.tree-node-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.15s;
}

.tree-node-header:hover {
    background: var(--bg-main);
}

.tree-node-header.active {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

.tree-node-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.tree-children {
    padding-left: 24px;
    display: none;
}

.tree-children.open {
    display: block;
}

.tree-leaf {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    font-size: 12px;
    color: var(--secondary);
    cursor: pointer;
    border-radius: 4px;
}

.tree-leaf:hover {
    background: var(--bg-main);
    color: var(--text);
}

/* Visual Query Builder */
.query-builder-canvas {
    min-height: 300px;
    background: #f8fafc;
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 20px;
    position: relative;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-content: flex-start;
}

.table-card-builder {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 220px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    cursor: move;
}

.table-card-builder-header {
    background: var(--primary);
    color: white;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px 8px 0 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.table-card-builder-header .remove-table {
    cursor: pointer;
    opacity: 0.7;
    background: none;
    border: none;
    color: white;
    font-size: 16px;
}

.table-card-builder-body {
    max-height: 200px;
    overflow-y: auto;
}

.column-check {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    font-size: 12px;
    border-bottom: 1px solid #f1f5f9;
}

.column-check:hover {
    background: #f8fafc;
}

.column-check input[type="checkbox"] {
    accent-color: var(--primary);
}

.column-type {
    color: var(--text-light);
    font-size: 10px;
    margin-left: auto;
}

/* Alerts / Toasts */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 14px 20px;
    border-radius: 10px;
    color: white;
    font-size: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    animation: slideIn 0.3s ease;
    max-width: 420px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
.toast.info { background: var(--info); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* JSON viewer */
.json-viewer {
    background: #1e293b;
    color: #e2e8f0;
    padding: 16px;
    border-radius: 8px;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.5;
    overflow: auto;
    max-height: 400px;
    white-space: pre-wrap;
    word-break: break-all;
}

.json-key { color: #7dd3fc; }
.json-string { color: #86efac; }
.json-number { color: #fbbf24; }
.json-boolean { color: #c084fc; }
.json-null { color: #94a3b8; }

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 16px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}

.tab:hover { color: var(--text); }
.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    transform: scale(0.95);
    transition: transform 0.2s;
}

.modal-overlay.open .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--secondary);
    padding: 4px;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.badge-success { background: #dcfce7; color: #166534; }
.badge-error { background: #fef2f2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1d4ed8; }
.badge-warning { background: #fef3c7; color: #92400e; }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text);
}

/* Loading */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 16px;
}

.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
}

.pagination button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

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

/* Responsive for query panel */
.query-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    min-height: calc(100vh - 160px);
}

.query-layout.sidebar-hidden {
    grid-template-columns: 1fr;
}

.query-layout.sidebar-hidden .query-sidebar {
    display: none;
}

.query-sidebar {
    overflow-y: auto;
    max-height: calc(100vh - 160px);
    position: sticky;
    top: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.query-main {
    display: flex;
    flex-direction: column;
    overflow: visible;
    min-width: 0; /* prevent grid blowout */
}

/* Toggle query sidebar button */
.query-sidebar-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 10px;
    cursor: pointer;
    font-size: 12px;
    color: var(--secondary);
    transition: background 0.2s;
    white-space: nowrap;
}
.query-sidebar-toggle:hover {
    background: var(--bg-main);
    color: var(--text);
}

/* Tree sections in query sidebar */
.tree-section-header {
    font-size: 11px;
    font-weight: 600;
    color: var(--secondary);
    text-transform: uppercase;
    margin: 10px 0 2px;
    padding: 6px 8px;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background 0.15s;
    user-select: none;
}

.tree-section-header:hover {
    background: var(--bg-main);
}

.tree-section-items {
    overflow: hidden;
    transition: max-height 0.2s;
}

.tree-section-items.collapsed {
    display: none;
}

/* Expandable tree items */
.tree-item-expandable {
    position: relative;
}

.tree-leaf-parent {
    display: flex;
    align-items: center;
    gap: 4px;
}

.tree-leaf-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-expand-arrow {
    font-size: 8px;
    color: var(--text-light);
    width: 12px;
    flex-shrink: 0;
    text-align: center;
    transition: transform 0.15s;
}

.tree-item-children {
    padding-left: 20px;
    border-left: 1px solid var(--border);
    margin-left: 10px;
}

.tree-item-children.collapsed {
    display: none;
}

.tree-col-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 8px;
    font-size: 11px;
    cursor: pointer;
    border-radius: 3px;
}

.tree-col-item:hover {
    background: var(--bg-main);
}

.tree-col-name {
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-col-type {
    color: var(--text-light);
    font-size: 10px;
    margin-left: auto;
    flex-shrink: 0;
}

.tree-col-pk {
    background: var(--success);
    color: white;
    font-size: 8px;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: 700;
    flex-shrink: 0;
}

.tree-col-badge-mode {
    background: #dbeafe;
    color: var(--primary-dark);
    font-size: 9px;
    padding: 1px 5px;
    border-radius: 3px;
    font-weight: 600;
    flex-shrink: 0;
}

.tree-routine-def {
    background: #1e293b;
    color: #e2e8f0;
    padding: 8px 10px;
    border-radius: 6px;
    font-family: var(--mono);
    font-size: 10px;
    line-height: 1.4;
    overflow: auto;
    max-height: 150px;
    white-space: pre-wrap;
    word-break: break-all;
    margin: 4px 8px 8px;
}

/* JSON Steps */
.json-steps {
    background: #fffbeb;
    border-bottom: 1px solid #fbbf24;
}

.json-step {
    padding: 16px 20px;
    border-bottom: 1px solid #fde68a;
}

.json-step:last-child {
    border-bottom: none;
}

.json-step-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.json-step-number {
    width: 26px;
    height: 26px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.json-step-title {
    font-size: 14px;
    font-weight: 600;
    color: #78350f;
}

.json-step-desc {
    font-size: 12px;
    color: #92400e;
    line-height: 1.5;
    margin-left: 36px;
}

.json-step-desc code {
    background: rgba(146, 64, 14, 0.1);
    padding: 1px 5px;
    border-radius: 3px;
    font-family: var(--mono);
    font-size: 11px;
}

.json-step-desc kbd {
    background: #78350f;
    color: white;
    padding: 1px 6px;
    border-radius: 3px;
    font-family: var(--mono);
    font-size: 10px;
}

.json-param-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    margin-left: 36px;
}

.json-param-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    background: #dbeafe;
    padding: 4px 10px;
    border-radius: 12px;
    min-width: 36px;
    text-align: center;
    flex-shrink: 0;
}

.json-param-arrow {
    color: #92400e;
    font-size: 14px;
    flex-shrink: 0;
}

.json-param-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #fbbf24;
    border-radius: 6px;
    font-size: 13px;
    font-family: var(--mono);
    background: white;
    color: var(--text);
}

.json-param-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37,99,235,0.15);
}

.json-param-remove {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 18px;
    padding: 2px 6px;
    border-radius: 4px;
    flex-shrink: 0;
}

.json-param-remove:hover {
    background: #fef2f2;
}

.json-no-params {
    margin-left: 36px;
    font-size: 12px;
    color: #92400e;
    font-style: italic;
    padding: 8px 0;
}

/* Audit favorite star */
.audit-fav {
    cursor: pointer;
    font-size: 18px;
    color: #d1d5db;
    transition: color 0.15s, transform 0.15s;
    user-select: none;
}
.audit-fav:hover {
    color: #fbbf24;
    transform: scale(1.2);
}
.audit-fav.active {
    color: #f59e0b;
}

/* Help Panel */
.help-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    height: 100vh;
    background: var(--bg-card);
    border-left: 1px solid var(--border);
    box-shadow: -4px 0 24px rgba(0,0,0,0.1);
    z-index: 900;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.help-panel.open {
    transform: translateX(0);
}

.help-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-main);
    flex-shrink: 0;
}

.help-panel-header h3 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.help-panel-close {
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--secondary);
    padding: 4px 8px;
    border-radius: 4px;
}
.help-panel-close:hover {
    background: var(--border);
}

.help-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

/* Help content styles */
.help-section {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.help-section:last-child {
    border-bottom: none;
}

.help-section h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}

.help-section h5 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin: 14px 0 8px;
}

.help-section p {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: 8px;
}

.help-section ul, .help-section ol {
    font-size: 13px;
    line-height: 1.7;
    padding-left: 20px;
    margin-bottom: 8px;
    color: var(--text);
}

.help-section li {
    margin-bottom: 4px;
}

.help-section code {
    background: #f1f5f9;
    padding: 1px 6px;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--primary-dark);
}

.help-section kbd {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 11px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.help-section strong {
    color: var(--text);
}

.help-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin: 8px 0;
}

.help-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.help-table td:first-child {
    width: 120px;
    white-space: nowrap;
}

.help-table tr:last-child td {
    border-bottom: none;
}

.help-code {
    background: #1e293b;
    color: #e2e8f0;
    padding: 12px 16px;
    border-radius: 8px;
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.5;
    overflow-x: auto;
    margin: 8px 0;
    white-space: pre;
}

/* Responsive */
@media (max-width: 900px) {
    .help-panel { width: 100%; }
    .sidebar { margin-left: -260px; }
    .sidebar.show-mobile { margin-left: 0; }

    .query-layout {
        grid-template-columns: 1fr;
    }
    .query-sidebar {
        display: none;
    }
    .query-layout.sidebar-visible .query-sidebar {
        display: block;
        max-height: 300px;
    }

    .content-area { padding: 12px; }
    .topbar { padding: 10px 16px; }
    .topbar h2 { font-size: 15px; }

    .conn-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }

    .toolbar { flex-wrap: wrap; gap: 8px; }
}

/* Execution mode switch */
.mode-switch {
    display: flex;
    background: var(--bg-main);
    border-radius: 8px;
    padding: 3px;
}

.mode-switch button {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: transparent;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--secondary);
}

.mode-switch button.active {
    background: var(--bg-card);
    color: var(--text);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Stats cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--secondary);
    margin-top: 4px;
}

/* Result tabs */
.result-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
}

.result-tab {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: var(--secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.result-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}