Rebuild dashboard panels on the new chart layer

Drag-and-drop grid stays on GridStack (already a Phase 3 dependency --
no new library needed). PanelEditor.svelte (a Modal) replaces the old
inline add-panel form: a debounced live preview reuses PanelViz
directly, so the preview is pixel-identical to what renders on save
instead of drifting from a separate preview renderer. Dashboards list
and detail pages get EmptyState/Skeleton for empty/loading states
instead of a blank panel or a raw error string, and panel titles are
now clickable buttons that open the editor.

web/src/lib/components/PanelEditor.svelte

@@ -0,0 +1,310 @@
+<script lang="ts">
+	// Add and edit share one editor: creating a panel and changing its
+	// query/viz afterwards are the same form, just seeded differently and
+	// calling addPanel vs updatePanel on save. The preview pane below the
+	// form runs the actual query (debounced -- not on every keystroke)
+	// and renders it through the real PanelViz, not a separate mock-up,
+	// so what you see here is exactly what lands on the dashboard, not
+	// an approximation of it.
+	import { Modal, Button, Input, Select, Tabs } from '$lib/components/ui';
+	import QueryBar from '$lib/QueryBar.svelte';
+	import PanelViz from '$lib/PanelViz.svelte';
+	import {
+		runQuery,
+		injectTimeRange,
+		addPanel,
+		updatePanel,
+		type Panel,
+		type VizType,
+		type Language,
+		type QueryResult
+	} from '$lib/api';
+
+	let {
+		open = $bindable(false),
+		dashboardId,
+		panel = null,
+		dashboardEarliest,
+		dashboardLatest,
+		nextY,
+		onSaved
+	}: {
+		open?: boolean;
+		dashboardId: string;
+		panel?: Panel | null;
+		dashboardEarliest: string;
+		dashboardLatest: string;
+		// Only consulted when adding a new panel -- stacks it below
+		// whatever's already on the grid. The dashboard page owns panel
+		// layout, so it owns this calculation too.
+		nextY: () => number;
+		onSaved: () => void;
+	} = $props();
+
+	let title = $state('');
+	let query = $state('');
+	let language = $state<Language>('');
+	let vizType = $state<VizType>('table');
+	let vizConfig = $state<Record<string, string>>({});
+	let earliestOverride = $state('');
+	let latestOverride = $state('');
+	let saving = $state(false);
+	let saveError = $state('');
+
+	// Re-seed whenever the editor opens (not on every `panel` change --
+	// the dashboard page keeps `panel` pointed at the same object while
+	// editing, this should only reset when a *different* panel or a
+	// fresh "new panel" session opens).
+	let seededFor: string | null = null;
+	$effect(() => {
+		if (!open) {
+			seededFor = null;
+			return;
+		}
+		const key = panel?.id ?? '__new__';
+		if (seededFor === key) return;
+		seededFor = key;
+		title = panel?.title ?? '';
+		query = panel?.query ?? '';
+		language = panel?.query_language ?? '';
+		vizType = panel?.viz_type ?? 'table';
+		vizConfig = { ...(panel?.viz_config ?? {}) };
+		earliestOverride = panel?.earliest_override ?? '';
+		latestOverride = panel?.latest_override ?? '';
+		saveError = '';
+	});
+
+	let previewResult = $state<QueryResult | null>(null);
+	let previewError = $state('');
+	let previewLoading = $state(false);
+	let debounceHandle: ReturnType<typeof setTimeout> | undefined;
+
+	$effect(() => {
+		// Deliberate dependency list: re-run the preview when any of these
+		// change, debounced so typing a query doesn't fire a request per
+		// keystroke.
+		query;
+		language;
+		earliestOverride;
+		latestOverride;
+		if (!open || !query.trim()) {
+			previewResult = null;
+			return;
+		}
+		clearTimeout(debounceHandle);
+		debounceHandle = setTimeout(runPreview, 400);
+		return () => clearTimeout(debounceHandle);
+	});
+
+	async function runPreview() {
+		previewLoading = true;
+		previewError = '';
+		try {
+			const earliest = earliestOverride || dashboardEarliest;
+			const latest = latestOverride || dashboardLatest;
+			previewResult = await runQuery(injectTimeRange(query, earliest, latest), language);
+		} catch (e) {
+			previewError = e instanceof Error ? e.message : String(e);
+			previewResult = null;
+		} finally {
+			previewLoading = false;
+		}
+	}
+
+	async function save() {
+		if (!query.trim()) return;
+		saving = true;
+		saveError = '';
+		try {
+			const input = {
+				title,
+				query,
+				query_language: language,
+				viz_type: vizType,
+				viz_config: vizConfig,
+				earliest_override: earliestOverride || null,
+				latest_override: latestOverride || null
+			};
+			if (panel) {
+				await updatePanel(dashboardId, { ...panel, ...input });
+			} else {
+				await addPanel(dashboardId, {
+					...input,
+					position_x: 0,
+					position_y: nextY(),
+					width: 6,
+					height: 4
+				});
+			}
+			open = false;
+			onSaved();
+		} catch (e) {
+			saveError = e instanceof Error ? e.message : String(e);
+		} finally {
+			saving = false;
+		}
+	}
+
+	function setConfig(key: string, value: string) {
+		vizConfig = { ...vizConfig, [key]: value };
+	}
+
+	const vizOptions: { value: VizType; label: string }[] = [
+		{ value: 'table', label: 'Table' },
+		{ value: 'line', label: 'Line chart' },
+		{ value: 'bar', label: 'Bar chart' },
+		{ value: 'single_stat', label: 'Single stat' },
+		{ value: 'top_n', label: 'Top-N' },
+		{ value: 'heatmap', label: 'Heatmap' }
+	];
+
+	let tabs = [
+		{ id: 'query', label: 'Query' },
+		{ id: 'preview', label: 'Preview' }
+	];
+	let activeTab = $state('query');
+</script>
+
+<Modal bind:open title={panel ? 'Edit panel' : 'Add panel'}>
+	<div class="editor">
+		<Input placeholder="Panel title" bind:value={title} />
+
+		<label class="field-label" for="viz-type">Visualization</label>
+		<Select id="viz-type" bind:value={vizType}>
+			{#each vizOptions as opt (opt.value)}
+				<option value={opt.value}>{opt.label}</option>
+			{/each}
+		</Select>
+
+		{#if vizType === 'line' || vizType === 'bar'}
+			<div class="config-row">
+				<Input placeholder="x column (default: 1st)" bind:value={() => vizConfig.x_column ?? '', (v) => setConfig('x_column', v)} />
+				<Input
+					placeholder="value column (default: 2nd)"
+					bind:value={() => vizConfig.value_column ?? '', (v) => setConfig('value_column', v)}
+				/>
+				<Input
+					placeholder="series column (optional)"
+					bind:value={() => vizConfig.series_column ?? '', (v) => setConfig('series_column', v)}
+				/>
+			</div>
+			{#if vizType === 'bar'}
+				<label class="checkbox">
+					<input
+						type="checkbox"
+						checked={vizConfig.stacked === 'true'}
+						onchange={(e) => setConfig('stacked', String(e.currentTarget.checked))}
+					/>
+					Stack series
+				</label>
+			{/if}
+		{:else if vizType === 'top_n'}
+			<div class="config-row">
+				<Input placeholder="label column (default: 1st)" bind:value={() => vizConfig.label_column ?? '', (v) => setConfig('label_column', v)} />
+				<Input
+					placeholder="value column (default: numeric)"
+					bind:value={() => vizConfig.value_column ?? '', (v) => setConfig('value_column', v)}
+				/>
+			</div>
+		{:else if vizType === 'heatmap'}
+			<div class="config-row">
+				<Input placeholder="x column (default: 1st)" bind:value={() => vizConfig.x_column ?? '', (v) => setConfig('x_column', v)} />
+				<Input placeholder="y column (default: 2nd)" bind:value={() => vizConfig.y_column ?? '', (v) => setConfig('y_column', v)} />
+				<Input
+					placeholder="value column (default: 3rd)"
+					bind:value={() => vizConfig.value_column ?? '', (v) => setConfig('value_column', v)}
+				/>
+			</div>
+		{:else if vizType === 'single_stat'}
+			<div class="config-row">
+				<Input
+					placeholder="value column (default: 2nd)"
+					bind:value={() => vizConfig.value_column ?? '', (v) => setConfig('value_column', v)}
+				/>
+				<Input placeholder="unit (e.g. ms, %)" bind:value={() => vizConfig.unit ?? '', (v) => setConfig('unit', v)} />
+			</div>
+			<label class="checkbox">
+				<input
+					type="checkbox"
+					checked={vizConfig.higher_is_worse === 'true'}
+					onchange={(e) => setConfig('higher_is_worse', String(e.currentTarget.checked))}
+				/>
+				Rising trend means something is wrong (colors an increase as an error, not neutral)
+			</label>
+		{/if}
+
+		<div class="overrides">
+			<Input placeholder="Earliest override (e.g. -6h)" bind:value={earliestOverride} />
+			<Input placeholder="Latest override (e.g. now)" bind:value={latestOverride} />
+		</div>
+
+		<Tabs {tabs} bind:active={activeTab} />
+
+		<div id="panel-query" role="tabpanel" aria-labelledby="tab-query" hidden={activeTab !== 'query'}>
+			<QueryBar bind:query bind:language onRun={runPreview} loading={previewLoading} />
+		</div>
+
+		<div id="panel-preview" role="tabpanel" aria-labelledby="tab-preview" hidden={activeTab !== 'preview'} class="preview">
+			{#if previewLoading && !previewResult}
+				<p class="muted">Running…</p>
+			{:else if previewError}
+				<p class="error">Error: {previewError}</p>
+			{:else if previewResult}
+				<PanelViz result={previewResult} {vizType} {vizConfig} />
+			{:else}
+				<p class="muted">Run a query to preview it here.</p>
+			{/if}
+		</div>
+
+		{#if saveError}<p class="error">{saveError}</p>{/if}
+	</div>
+
+	{#snippet footer()}
+		<Button variant="ghost" onclick={() => (open = false)}>Cancel</Button>
+		<Button variant="primary" onclick={save} disabled={saving || !query.trim()}>
+			{saving ? 'Saving…' : 'Save panel'}
+		</Button>
+	{/snippet}
+</Modal>
+
+<style>
+	.editor {
+		display: flex;
+		flex-direction: column;
+		gap: var(--space-3);
+	}
+	.field-label {
+		font-size: var(--text-sm);
+		color: var(--color-text-muted);
+		margin-top: var(--space-1);
+	}
+	.config-row {
+		display: grid;
+		grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
+		gap: var(--space-2);
+	}
+	.overrides {
+		display: grid;
+		grid-template-columns: 1fr 1fr;
+		gap: var(--space-2);
+	}
+	.checkbox {
+		display: flex;
+		align-items: center;
+		gap: var(--space-2);
+		font-size: var(--text-sm);
+		color: var(--color-text-muted);
+	}
+	.preview {
+		min-height: 12rem;
+		border: 1px solid var(--color-border);
+		border-radius: var(--radius-md);
+		padding: var(--space-3);
+	}
+	.muted {
+		color: var(--color-text-muted);
+	}
+	.error {
+		color: var(--color-danger);
+	}
+</style>

web/src/routes/dashboards/+page.svelte

@@ -6,6 +6,7 @@
 		importDashboard,
 		type Dashboard
 	} from '$lib/api';
+	import { Button, Input, EmptyState, Skeleton } from '$lib/components/ui';
 
 	let dashboards = $state<Dashboard[]>([]);
 	let loading = $state(true);
@@ -65,12 +66,12 @@
 	{#if error}<p class="error">Error: {error}</p>{/if}
 
 	<div class="create-row">
-		<input
+		<Input
 			placeholder="New dashboard name"
 			bind:value={newName}
-			onkeydown={(e) => e.key === 'Enter' && create()}
+			onkeydown={(e: KeyboardEvent) => e.key === 'Enter' && create()}
 		/>
-		<button onclick={create} disabled={!newName.trim()}>Create</button>
+		<Button onclick={create} disabled={!newName.trim()}>Create</Button>
 		<label class="import-label">
 			Import JSON
 			<input type="file" accept="application/json" onchange={onImportFile} hidden />
@@ -78,9 +79,17 @@
 	</div>
 
 	{#if loading}
-		<p>Loading…</p>
+		<div class="skeleton-list">
+			{#each Array(3) as _, i (i)}
+				<Skeleton height="2.25rem" />
+			{/each}
+		</div>
 	{:else if dashboards.length === 0}
-		<p>No dashboards yet.</p>
+		<EmptyState
+			icon="▤"
+			title="No dashboards yet"
+			description="Build a query on the Search page and save it here, or create an empty dashboard above and add panels to it."
+		/>
 	{:else}
 		<ul class="dashboard-list">
 			{#each dashboards as d (d.id)}
@@ -96,24 +105,31 @@
 
 <style>
 	main {
-		font-family: system-ui, sans-serif;
-		max-width: 960px;
-		margin: 2rem auto;
-		padding: 0 1rem;
+		max-width: 48rem;
+	}
+	h1 {
+		font-size: var(--text-xl);
+		margin-bottom: var(--space-4);
 	}
 	.error {
-		color: #b00020;
+		color: var(--color-danger);
+	}
+	.skeleton-list {
+		display: flex;
+		flex-direction: column;
+		gap: var(--space-2);
 	}
 	.create-row {
 		display: flex;
 		align-items: center;
-		gap: 0.5rem;
-		margin-bottom: 1.5rem;
+		gap: var(--space-3);
+		margin-bottom: var(--space-5);
 	}
 	.import-label {
 		cursor: pointer;
-		color: #06c;
-		font-size: 0.85rem;
+		color: var(--color-accent);
+		font-size: var(--text-sm);
+		white-space: nowrap;
 	}
 	.dashboard-list {
 		list-style: none;
@@ -122,26 +138,30 @@
 	.dashboard-list li {
 		display: flex;
 		align-items: center;
-		gap: 0.75rem;
-		padding: 0.5rem 0;
-		border-bottom: 1px solid #eee;
+		gap: var(--space-3);
+		padding: var(--space-3) 0;
+		border-bottom: 1px solid var(--color-border);
 	}
 	.dashboard-list a {
-		font-weight: 600;
-		color: #06c;
+		font-weight: var(--font-weight-medium);
+		color: var(--color-text);
 		text-decoration: none;
 	}
+	.dashboard-list a:hover {
+		color: var(--color-accent);
+	}
 	.desc {
-		color: #777;
-		font-size: 0.85rem;
+		color: var(--color-text-muted);
+		font-size: var(--text-sm);
 	}
 	.delete {
 		margin-left: auto;
-		color: #b00020;
+		color: var(--color-danger);
 		background: none;
-		border: 1px solid #b00020;
-		border-radius: 4px;
-		padding: 0.15rem 0.5rem;
+		border: 1px solid var(--color-danger);
+		border-radius: var(--radius-sm);
+		padding: 0.15rem var(--space-2);
 		cursor: pointer;
+		font-family: var(--font-ui);
 	}
 </style>

web/src/routes/dashboards/[id]/+page.svelte

@@ -2,13 +2,13 @@
 	import { page } from '$app/state';
 	import { GridStack, type GridStackNode } from 'gridstack';
 	import 'gridstack/dist/gridstack.min.css';
-	import QueryBar from '$lib/QueryBar.svelte';
 	import PanelViz from '$lib/PanelViz.svelte';
+	import PanelEditor from '$lib/components/PanelEditor.svelte';
+	import { Button, Card, EmptyState, Skeleton } from '$lib/components/ui';
 	import {
 		getDashboard,
 		updateDashboard,
 		deleteDashboard as apiDeleteDashboard,
-		addPanel,
 		deletePanel as apiDeletePanel,
 		updatePanel as apiUpdatePanel,
 		exportDashboard,
@@ -17,8 +17,6 @@
 		injectTimeRange,
 		type Dashboard,
 		type Panel,
-		type VizType,
-		type Language,
 		type QueryResult
 	} from '$lib/api';
 
@@ -37,11 +35,29 @@
 	let gridEl: HTMLDivElement | undefined = $state();
 	let grid: GridStack | undefined;
 
-	let showAddPanel = $state(false);
-	let newTitle = $state('');
-	let newQuery = $state('');
-	let newLanguage = $state<Language>('');
-	let newVizType = $state<VizType>('table');
+	let editorOpen = $state(false);
+	let editingPanel = $state<Panel | null>(null);
+
+	function openNewPanel() {
+		editingPanel = null;
+		editorOpen = true;
+	}
+	function openEditPanel(panel: Panel) {
+		editingPanel = panel;
+		editorOpen = true;
+	}
+
+	// Zoom on a time-series panel becomes the dashboard's new global
+	// range -- the brief's "zoomed range able to feed back into the
+	// global dashboard time-range picker" requirement. Reuses the exact
+	// same applyTimeRange() path the manual earliest/latest inputs use,
+	// so a zoom and a typed range behave identically (persisted, re-runs
+	// every panel), not two divergent code paths.
+	async function onPanelZoom(range: { earliest: string; latest: string }) {
+		earliestInput = range.earliest;
+		latestInput = range.latest;
+		await applyTimeRange();
+	}
 
 	async function load() {
 		loading = true;
@@ -99,30 +115,6 @@
 		return Math.max(...dashboard.panels.map((p) => p.position_y + p.height));
 	}
 
-	async function submitAddPanel() {
-		if (!newQuery.trim()) return;
-		try {
-			await addPanel(dashboardId, {
-				title: newTitle,
-				query: newQuery,
-				query_language: newLanguage,
-				viz_type: newVizType,
-				position_x: 0,
-				position_y: nextY(),
-				width: 6,
-				height: 4
-			});
-			showAddPanel = false;
-			newTitle = '';
-			newQuery = '';
-			newLanguage = '';
-			newVizType = 'table';
-			await load();
-		} catch (e) {
-			error = e instanceof Error ? e.message : String(e);
-		}
-	}
-
 	async function removePanel(panelId: string) {
 		try {
 			await apiDeletePanel(dashboardId, panelId);
@@ -193,15 +185,23 @@
 
 <main>
 	{#if loading}
-		<p>Loading…</p>
+		<div class="skeleton-header">
+			<Skeleton width="16rem" height="1.75rem" />
+			<Skeleton width="8rem" height="1.5rem" />
+		</div>
+		<div class="skeleton-grid">
+			{#each Array(4) as _, i (i)}
+				<Card><Skeleton height="10rem" /></Card>
+			{/each}
+		</div>
 	{:else if !dashboard}
-		<p class="error">Error: {error}</p>
+		<EmptyState icon="⚠" title="Couldn't load this dashboard" description={error} />
 	{:else}
 		<div class="header">
 			<h1>{dashboard.name}</h1>
 			<div class="header-actions">
-				<button onclick={doExport}>Export JSON</button>
-				<button class="delete" onclick={removeDashboard}>Delete dashboard</button>
+				<Button variant="secondary" onclick={doExport}>Export JSON</Button>
+				<Button variant="danger" onclick={removeDashboard}>Delete dashboard</Button>
 			</div>
 		</div>
 		{#if dashboard.description}<p class="desc">{dashboard.description}</p>{/if}
@@ -210,8 +210,8 @@
 		<div class="time-range">
 			<label>Earliest <input bind:value={earliestInput} placeholder="-1h" /></label>
 			<label>Latest <input bind:value={latestInput} placeholder="now" /></label>
-			<button onclick={applyTimeRange}>Apply to all panels</button>
-			<span class="hint">Per-panel overrides win over this default -- see the panel editor.</span>
+			<Button size="sm" onclick={applyTimeRange}>Apply to all panels</Button>
+			<span class="hint">Per-panel overrides win over this default, and a time-series panel's zoom updates this automatically.</span>
 		</div>
 
 		{#if dashboard.panels && dashboard.panels.length > 0}
@@ -229,8 +229,10 @@
 					>
 						<div class="grid-stack-item-content panel">
 							<div class="panel-header">
-								<span class="panel-title">{panel.title || panel.query}</span>
-								<button class="panel-delete" onclick={() => removePanel(panel.id)}>×</button>
+								<button class="panel-title" onclick={() => openEditPanel(panel)} title="Edit panel">
+									{panel.title || panel.query}
+								</button>
+								<button class="panel-delete" onclick={() => removePanel(panel.id)} aria-label="Delete panel">×</button>
 							</div>
 							{#if panelErrors[panel.id]}
 								<p class="error">Error: {panelErrors[panel.id]}</p>
@@ -239,49 +241,49 @@
 									result={panelResults[panel.id]}
 									vizType={panel.viz_type}
 									vizConfig={panel.viz_config}
+									query={panel.query}
+									onZoom={onPanelZoom}
 								/>
 							{:else}
-								<p>Loading…</p>
+								<Skeleton height="100%" />
 							{/if}
 						</div>
 					</div>
 				{/each}
 			</div>
 		{:else}
-			<p>No panels yet. Add one below.</p>
+			<EmptyState
+				icon="▤"
+				title="No panels yet"
+				description="Build a query on the Search page, then add it here — or start straight from a blank panel below."
+			>
+				{#snippet action()}
+					<Button variant="primary" onclick={openNewPanel}>+ Add your first panel</Button>
+				{/snippet}
+			</EmptyState>
 		{/if}
 
-		<div class="add-panel">
-			<button onclick={() => (showAddPanel = !showAddPanel)}>
-				{showAddPanel ? 'Cancel' : '+ Add panel'}
-			</button>
-			{#if showAddPanel}
-				<div class="add-panel-form">
-					<input placeholder="Panel title" bind:value={newTitle} />
-					<QueryBar bind:query={newQuery} bind:language={newLanguage} onRun={submitAddPanel} />
-					<label>
-						Visualization:
-						<select bind:value={newVizType}>
-							<option value="table">Table</option>
-							<option value="line">Line chart</option>
-							<option value="bar">Bar chart</option>
-							<option value="single_stat">Single stat</option>
-							<option value="top_n">Top-N</option>
-						</select>
-					</label>
-					<button onclick={submitAddPanel} disabled={!newQuery.trim()}>Add panel</button>
-				</div>
-			{/if}
-		</div>
+		{#if dashboard.panels && dashboard.panels.length > 0}
+			<div class="add-panel">
+				<Button onclick={openNewPanel}>+ Add panel</Button>
+			</div>
+		{/if}
+
+		<PanelEditor
+			bind:open={editorOpen}
+			{dashboardId}
+			panel={editingPanel}
+			dashboardEarliest={earliestInput}
+			dashboardLatest={latestInput}
+			{nextY}
+			onSaved={load}
+		/>
 	{/if}
 </main>
 
 <style>
 	main {
-		font-family: system-ui, sans-serif;
-		max-width: 1200px;
-		margin: 2rem auto;
-		padding: 0 1rem;
+		max-width: 75rem;
 	}
 	.header {
 		display: flex;
@@ -290,73 +292,90 @@
 	}
 	.header-actions {
 		display: flex;
-		gap: 0.5rem;
+		gap: var(--space-2);
 	}
 	.desc {
-		color: #555;
+		color: var(--color-text-muted);
 	}
 	.error {
-		color: #b00020;
+		color: var(--color-danger);
 	}
 	.time-range {
 		display: flex;
 		align-items: center;
-		gap: 0.75rem;
-		margin: 1rem 0;
+		gap: var(--space-3);
+		margin: var(--space-4) 0;
 		flex-wrap: wrap;
 	}
 	.time-range input {
 		width: 6rem;
+		background: var(--color-surface);
+		color: var(--color-text);
+		border: 1px solid var(--color-border);
+		border-radius: var(--radius-sm);
+		padding: var(--space-1) var(--space-2);
+		font-family: var(--font-mono);
 	}
 	.hint {
-		font-size: 0.8rem;
-		color: #777;
-	}
-	.delete {
-		color: #b00020;
-		background: none;
-		border: 1px solid #b00020;
-		border-radius: 4px;
-		padding: 0.15rem 0.5rem;
-		cursor: pointer;
+		font-size: var(--text-sm);
+		color: var(--color-text-muted);
 	}
 	.panel {
-		border: 1px solid #ddd;
-		border-radius: 6px;
-		padding: 0.5rem 0.75rem;
+		border: 1px solid var(--color-border);
+		border-radius: var(--radius-md);
+		padding: var(--space-2) var(--space-3);
 		height: 100%;
 		box-sizing: border-box;
 		overflow: auto;
-		background: white;
+		background: var(--color-surface);
+		color: var(--color-text);
 	}
 	.panel-header {
 		display: flex;
 		align-items: center;
 		justify-content: space-between;
-		font-weight: 600;
-		margin-bottom: 0.5rem;
+		gap: var(--space-2);
+		margin-bottom: var(--space-2);
+	}
+	.panel-title {
+		background: none;
+		border: none;
+		padding: 0;
+		font-family: var(--font-ui);
+		font-weight: var(--font-weight-medium);
+		font-size: var(--text-base);
+		color: var(--color-text);
+		text-align: left;
+		cursor: pointer;
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+	}
+	.panel-title:hover {
+		color: var(--color-accent);
 	}
 	.panel-delete {
 		background: none;
 		border: none;
 		cursor: pointer;
-		font-size: 1rem;
-		color: #999;
+		font-size: var(--text-md);
+		color: var(--color-text-muted);
+		flex: none;
+	}
+	.panel-delete:hover {
+		color: var(--color-danger);
 	}
 	.add-panel {
-		margin-top: 1.5rem;
+		margin-top: var(--space-5);
 	}
-	.add-panel-form {
-		border: 1px solid #ddd;
-		border-radius: 6px;
-		padding: 1rem;
-		margin-top: 0.5rem;
+	.skeleton-header {
 		display: flex;
-		flex-direction: column;
-		gap: 0.75rem;
-		max-width: 640px;
+		justify-content: space-between;
+		margin-bottom: var(--space-5);
 	}
-	.add-panel-form input {
-		box-sizing: border-box;
+	.skeleton-grid {
+		display: grid;
+		grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
+		gap: var(--space-4);
 	}
 </style>