diff --git a/apps/manacore/apps/web/src/lib/components/observatory/ui/LakeCard.svelte b/apps/manacore/apps/web/src/lib/components/observatory/ui/LakeCard.svelte
new file mode 100644
index 000000000..fc263f97e
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/components/observatory/ui/LakeCard.svelte
@@ -0,0 +1,177 @@
+<script lang="ts">
+	import type { LakeData } from '../data/types';
+
+	let { lake }: { lake: LakeData } = $props();
+
+	// Normalize the lake path to fit inside the card SVG
+	// We'll render it at its original scale but crop via viewBox
+	let viewBox = $derived(() => {
+		// Parse path to get rough bounds
+		const nums = lake.path.match(/[\d.]+/g)?.map(Number) || [];
+		let minX = Infinity,
+			minY = Infinity,
+			maxX = -Infinity,
+			maxY = -Infinity;
+		for (let i = 0; i < nums.length; i += 2) {
+			if (nums[i] < minX) minX = nums[i];
+			if (nums[i] > maxX) maxX = nums[i];
+		}
+		for (let i = 1; i < nums.length; i += 2) {
+			if (nums[i] < minY) minY = nums[i];
+			if (nums[i] > maxY) maxY = nums[i];
+		}
+		const pad = 20;
+		return `${minX - pad} ${minY - pad} ${maxX - minX + pad * 2} ${maxY - minY + pad * 2}`;
+	});
+
+	const lakeDescriptions: Record<string, string> = {
+		auth: 'Zentraler Authentifizierungs-Hub. Alle Services fliessen durch diesen See.',
+		redis: 'Schneller Cache-Speicher. Klein, kristallklar, sofort verfugbar.',
+		minio: 'Objekt-Speicher fur Dateien, Bilder und Medien aller Apps.',
+		'db-left': 'PostgreSQL-Datenbanken fur Calendar, Todo, Contacts, Storage.',
+		'db-center': 'PostgreSQL-Datenbanken fur Zitare, Mukke, Clock, NutriPhi.',
+		'db-right': 'PostgreSQL-Datenbanken fur Photos, SkillTree, Context, Planta.',
+	};
+
+	const lakeIcons: Record<string, string> = {
+		auth: 'Mana Core Auth',
+		redis: 'Redis Cache',
+		minio: 'MinIO Storage',
+		'db-left': 'PostgreSQL West',
+		'db-center': 'PostgreSQL Mitte',
+		'db-right': 'PostgreSQL Ost',
+	};
+</script>
+
+<div class="lake-card">
+	<!-- Lake SVG preview -->
+	<div class="lake-preview">
+		<svg
+			width="220"
+			height="120"
+			viewBox={viewBox()}
+			preserveAspectRatio="xMidYMid meet"
+			xmlns="http://www.w3.org/2000/svg"
+		>
+			<defs>
+				<radialGradient id="lc-{lake.id}" cx="50%" cy="40%" r="60%">
+					<stop offset="0%" stop-color={lake.color} />
+					<stop offset="100%" stop-color={lake.colorDeep} />
+				</radialGradient>
+			</defs>
+			<path d={lake.path} fill="url(#lc-{lake.id})" />
+			<!-- Shimmer -->
+			<path d={lake.path} fill="white" opacity="0.08" />
+			<!-- Waves -->
+			<path
+				d={lake.path}
+				fill="none"
+				stroke="white"
+				stroke-width="0.8"
+				stroke-dasharray="4 12"
+				opacity="0.2"
+			>
+				<animate
+					attributeName="stroke-dashoffset"
+					values="0;16"
+					dur="4s"
+					repeatCount="indefinite"
+				/>
+			</path>
+		</svg>
+	</div>
+
+	<!-- Info -->
+	<div class="lake-info">
+		<h3 class="lake-name">{lake.label}</h3>
+		<span class="lake-service">{lakeIcons[lake.id] || lake.name}</span>
+		<p class="lake-desc">{lakeDescriptions[lake.id] || ''}</p>
+		<div class="lake-stats">
+			<span class="lake-stat">
+				<span class="stat-label">Klarheit</span>
+				<span class="stat-value">{Math.round(lake.clarity * 100)}%</span>
+			</span>
+			<span class="lake-stat">
+				<span class="stat-label">Fullstand</span>
+				<span class="stat-value">{Math.round(lake.level * 100)}%</span>
+			</span>
+		</div>
+	</div>
+</div>
+
+<style>
+	.lake-card {
+		flex-shrink: 0;
+		width: 260px;
+		background: rgba(15, 23, 42, 0.6);
+		backdrop-filter: blur(8px);
+		border: 1px solid rgba(148, 163, 184, 0.1);
+		border-radius: 12px;
+		overflow: hidden;
+		transition:
+			transform 0.2s,
+			border-color 0.2s;
+	}
+
+	.lake-card:hover {
+		transform: translateY(-3px);
+		border-color: rgba(59, 130, 246, 0.2);
+	}
+
+	.lake-preview {
+		display: flex;
+		justify-content: center;
+		align-items: center;
+		background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
+		padding: 12px;
+	}
+
+	.lake-info {
+		padding: 12px 14px;
+	}
+
+	.lake-name {
+		font-size: 15px;
+		font-weight: 600;
+		color: #f1f5f9;
+		margin: 0 0 2px 0;
+	}
+
+	.lake-service {
+		font-size: 11px;
+		color: #60a5fa;
+		font-weight: 500;
+	}
+
+	.lake-desc {
+		font-size: 11px;
+		color: #94a3b8;
+		margin: 8px 0;
+		line-height: 1.4;
+	}
+
+	.lake-stats {
+		display: flex;
+		gap: 16px;
+	}
+
+	.lake-stat {
+		display: flex;
+		flex-direction: column;
+		gap: 1px;
+	}
+
+	.stat-label {
+		font-size: 9px;
+		color: #64748b;
+		text-transform: uppercase;
+		letter-spacing: 0.05em;
+	}
+
+	.stat-value {
+		font-size: 13px;
+		font-weight: 600;
+		color: #cbd5e1;
+		font-variant-numeric: tabular-nums;
+	}
+</style>
diff --git a/apps/manacore/apps/web/src/lib/components/observatory/ui/PlantCard.svelte b/apps/manacore/apps/web/src/lib/components/observatory/ui/PlantCard.svelte
new file mode 100644
index 000000000..37bb8be1c
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/components/observatory/ui/PlantCard.svelte
@@ -0,0 +1,185 @@
+<script lang="ts">
+	import type { AppData } from '../data/types';
+	import { getHealthColor } from '../data/colors';
+	import PlantFactory from '../plants/PlantFactory.svelte';
+
+	let { app, onclick }: { app: AppData; onclick?: () => void } = $props();
+
+	const statusLabels: Record<string, string> = {
+		mature: 'Mature',
+		production: 'Production',
+		beta: 'Beta',
+		alpha: 'Alpha',
+		prototype: 'Prototype',
+	};
+
+	const statusColors: Record<string, string> = {
+		mature: '#34d399',
+		production: '#60a5fa',
+		beta: '#fbbf24',
+		alpha: '#f97316',
+		prototype: '#94a3b8',
+	};
+
+	const plantTypeLabels: Record<string, string> = {
+		oak: 'Eiche',
+		birch: 'Birke',
+		youngTree: 'Junger Baum',
+		reed: 'Schilf',
+		waterLily: 'Seerose',
+		moss: 'Moos',
+		shrub: 'Busch',
+		sprout: 'Sprossling',
+		stump: 'Baumstumpf',
+		swampCluster: 'Sumpfpflanze',
+	};
+
+	// Create a centered version of the app for the card SVG
+	let cardApp = $derived({
+		...app,
+		position: { x: 80, y: 120 },
+	});
+
+	function scoreColor(score: number): string {
+		if (score >= 85) return '#34d399';
+		if (score >= 70) return '#60a5fa';
+		if (score >= 55) return '#fbbf24';
+		if (score >= 40) return '#f97316';
+		return '#ef4444';
+	}
+</script>
+
+<button type="button" class="plant-card" {onclick}>
+	<!-- Plant SVG preview -->
+	<div class="plant-preview">
+		<svg width="160" height="160" viewBox="0 0 160 160" xmlns="http://www.w3.org/2000/svg">
+			<!-- Ground line -->
+			<ellipse cx="80" cy="125" rx="50" ry="6" fill="#7DB86A" opacity="0.3" />
+			<PlantFactory app={cardApp} />
+		</svg>
+	</div>
+
+	<!-- Info -->
+	<div class="plant-info">
+		<div class="plant-header">
+			<span class="plant-name">{app.displayName}</span>
+			<span class="plant-score" style="color: {scoreColor(app.score)}">{app.score}</span>
+		</div>
+		<div class="plant-meta">
+			<span class="plant-type">{plantTypeLabels[app.plantType] || app.plantType}</span>
+			<span class="plant-status" style="color: {statusColors[app.status]}">
+				{statusLabels[app.status]}
+			</span>
+		</div>
+		<!-- Mini score bar -->
+		<div class="plant-bar">
+			<div
+				class="plant-bar-fill"
+				style="width: {app.score}%; background: {scoreColor(app.score)}"
+			></div>
+		</div>
+		{#if app.trend !== 0}
+			<div class="plant-trend" class:positive={app.trend > 0} class:negative={app.trend < 0}>
+				{app.trend > 0 ? '+' : ''}{app.trend} seit letztem Audit
+			</div>
+		{/if}
+	</div>
+</button>
+
+<style>
+	.plant-card {
+		flex-shrink: 0;
+		width: 200px;
+		background: rgba(15, 23, 42, 0.6);
+		backdrop-filter: blur(8px);
+		border: 1px solid rgba(148, 163, 184, 0.1);
+		border-radius: 12px;
+		overflow: hidden;
+		cursor: pointer;
+		transition:
+			transform 0.2s,
+			border-color 0.2s,
+			box-shadow 0.2s;
+		text-align: left;
+		color: inherit;
+		padding: 0;
+	}
+
+	.plant-card:hover {
+		transform: translateY(-4px);
+		border-color: rgba(59, 130, 246, 0.3);
+		box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
+	}
+
+	.plant-preview {
+		display: flex;
+		justify-content: center;
+		align-items: center;
+		background: linear-gradient(180deg, #e0f2fe 0%, #bae6fd 40%, #7db86a 100%);
+		padding: 8px 0 0;
+	}
+
+	.plant-info {
+		padding: 12px;
+	}
+
+	.plant-header {
+		display: flex;
+		justify-content: space-between;
+		align-items: baseline;
+		margin-bottom: 4px;
+	}
+
+	.plant-name {
+		font-size: 14px;
+		font-weight: 600;
+		color: #f1f5f9;
+	}
+
+	.plant-score {
+		font-size: 20px;
+		font-weight: 800;
+		font-variant-numeric: tabular-nums;
+	}
+
+	.plant-meta {
+		display: flex;
+		justify-content: space-between;
+		font-size: 11px;
+		margin-bottom: 8px;
+	}
+
+	.plant-type {
+		color: #64748b;
+	}
+
+	.plant-status {
+		font-weight: 500;
+	}
+
+	.plant-bar {
+		height: 3px;
+		background: rgba(148, 163, 184, 0.15);
+		border-radius: 2px;
+		overflow: hidden;
+	}
+
+	.plant-bar-fill {
+		height: 100%;
+		border-radius: 2px;
+		transition: width 0.4s ease;
+	}
+
+	.plant-trend {
+		font-size: 10px;
+		margin-top: 6px;
+	}
+
+	.plant-trend.positive {
+		color: #34d399;
+	}
+
+	.plant-trend.negative {
+		color: #ef4444;
+	}
+</style>
diff --git a/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte b/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte
index 0c82e6a73..a48deeb69 100644
--- a/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte
+++ b/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte
@@ -1,9 +1,291 @@
 <script lang="ts">
 	import SeenplatteScene from '$lib/components/observatory/SeenplatteScene.svelte';
+	import PlantCard from '$lib/components/observatory/ui/PlantCard.svelte';
+	import LakeCard from '$lib/components/observatory/ui/LakeCard.svelte';
+	import DetailPanel from '$lib/components/observatory/ui/DetailPanel.svelte';
+	import { createMockEcosystem } from '$lib/components/observatory/data/mockData';
+	import { LAKES } from '$lib/components/observatory/data/layout';
+	import type { AppData } from '$lib/components/observatory/data/types';
+
+	type Tab = 'scene' | 'plants' | 'lakes';
+	let activeTab = $state<Tab>('scene');
+	let selectedApp = $state<AppData | null>(null);
+
+	const apps = createMockEcosystem();
+	const lakes = LAKES;
+
+	// Sort apps by score descending for gallery
+	const sortedApps = apps.toSorted((a, b) => b.score - a.score);
+
+	// Group by status
+	const matureApps = sortedApps.filter((a) => a.status === 'mature');
+	const productionApps = sortedApps.filter((a) => a.status === 'production');
+	const betaApps = sortedApps.filter((a) => a.status === 'beta');
+	const alphaApps = sortedApps.filter((a) => a.status === 'alpha');
+
+	const tabs: { id: Tab; label: string; count?: number }[] = [
+		{ id: 'scene', label: 'Seenplatte' },
+		{ id: 'plants', label: 'Pflanzen', count: apps.length },
+		{ id: 'lakes', label: 'Seen', count: lakes.length },
+	];
 </script>
 
-<div style="display: flex; flex-direction: column; gap: 1rem;">
-	<div style="height: calc(100vh - 12rem); min-height: 500px; width: 100%;">
-		<SeenplatteScene />
+<div class="observatory-page">
+	<!-- Tab bar -->
+	<div class="tab-bar">
+		{#each tabs as tab}
+			<button
+				type="button"
+				class="tab-btn"
+				class:active={activeTab === tab.id}
+				onclick={() => (activeTab = tab.id)}
+			>
+				{tab.label}
+				{#if tab.count}
+					<span class="tab-count">{tab.count}</span>
+				{/if}
+			</button>
+		{/each}
 	</div>
+
+	<!-- Tab content -->
+	{#if activeTab === 'scene'}
+		<div class="scene-container">
+			<SeenplatteScene />
+		</div>
+	{:else if activeTab === 'plants'}
+		<div class="gallery-section">
+			<div class="gallery-header">
+				<h2 class="gallery-title">Alle Pflanzen</h2>
+				<p class="gallery-subtitle">
+					Jede App im Mana-Okosystem als Pflanze — Grosse und Art spiegeln den ManaScore wider
+				</p>
+			</div>
+
+			{#if matureApps.length}
+				<div class="gallery-group">
+					<h3 class="group-label">
+						<span class="group-dot" style="background: #34d399"></span>
+						Mature
+					</h3>
+					<div class="gallery-scroll">
+						{#each matureApps as app (app.id)}
+							<PlantCard {app} onclick={() => (selectedApp = app)} />
+						{/each}
+					</div>
+				</div>
+			{/if}
+
+			{#if productionApps.length}
+				<div class="gallery-group">
+					<h3 class="group-label">
+						<span class="group-dot" style="background: #60a5fa"></span>
+						Production
+					</h3>
+					<div class="gallery-scroll">
+						{#each productionApps as app (app.id)}
+							<PlantCard {app} onclick={() => (selectedApp = app)} />
+						{/each}
+					</div>
+				</div>
+			{/if}
+
+			{#if betaApps.length}
+				<div class="gallery-group">
+					<h3 class="group-label">
+						<span class="group-dot" style="background: #fbbf24"></span>
+						Beta
+					</h3>
+					<div class="gallery-scroll">
+						{#each betaApps as app (app.id)}
+							<PlantCard {app} onclick={() => (selectedApp = app)} />
+						{/each}
+					</div>
+				</div>
+			{/if}
+
+			{#if alphaApps.length}
+				<div class="gallery-group">
+					<h3 class="group-label">
+						<span class="group-dot" style="background: #f97316"></span>
+						Alpha
+					</h3>
+					<div class="gallery-scroll">
+						{#each alphaApps as app (app.id)}
+							<PlantCard {app} onclick={() => (selectedApp = app)} />
+						{/each}
+					</div>
+				</div>
+			{/if}
+		</div>
+	{:else if activeTab === 'lakes'}
+		<div class="gallery-section">
+			<div class="gallery-header">
+				<h2 class="gallery-title">Alle Seen</h2>
+				<p class="gallery-subtitle">
+					Infrastruktur-Services als Gewasser — Klarheit und Fullstand zeigen den Systemzustand
+				</p>
+			</div>
+
+			<div class="gallery-scroll lakes-scroll">
+				{#each lakes as lake (lake.id)}
+					<LakeCard {lake} />
+				{/each}
+			</div>
+		</div>
+	{/if}
 </div>
+
+<!-- Detail panel (shared across tabs) -->
+<DetailPanel app={selectedApp} onclose={() => (selectedApp = null)} />
+
+<style>
+	.observatory-page {
+		display: flex;
+		flex-direction: column;
+		gap: 0;
+	}
+
+	/* Tab bar */
+	.tab-bar {
+		display: flex;
+		gap: 2px;
+		background: rgba(15, 23, 42, 0.4);
+		padding: 4px;
+		border-radius: 10px;
+		margin-bottom: 12px;
+	}
+
+	.tab-btn {
+		flex: 1;
+		padding: 8px 16px;
+		border: none;
+		background: transparent;
+		color: #94a3b8;
+		font-size: 13px;
+		font-weight: 500;
+		border-radius: 7px;
+		cursor: pointer;
+		transition:
+			background 0.2s,
+			color 0.2s;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		gap: 6px;
+	}
+
+	.tab-btn:hover {
+		color: #cbd5e1;
+		background: rgba(148, 163, 184, 0.08);
+	}
+
+	.tab-btn.active {
+		background: rgba(59, 130, 246, 0.15);
+		color: #60a5fa;
+		font-weight: 600;
+	}
+
+	.tab-count {
+		font-size: 10px;
+		background: rgba(148, 163, 184, 0.15);
+		padding: 1px 6px;
+		border-radius: 8px;
+		font-weight: 600;
+	}
+
+	.tab-btn.active .tab-count {
+		background: rgba(59, 130, 246, 0.2);
+		color: #93c5fd;
+	}
+
+	/* Scene tab */
+	.scene-container {
+		height: calc(100vh - 14rem);
+		min-height: 500px;
+		width: 100%;
+	}
+
+	/* Gallery sections */
+	.gallery-section {
+		display: flex;
+		flex-direction: column;
+		gap: 24px;
+	}
+
+	.gallery-header {
+		margin-bottom: 4px;
+	}
+
+	.gallery-title {
+		font-size: 20px;
+		font-weight: 700;
+		color: var(--color-foreground, #f1f5f9);
+		margin: 0 0 4px 0;
+	}
+
+	.gallery-subtitle {
+		font-size: 13px;
+		color: var(--color-muted-foreground, #94a3b8);
+		margin: 0;
+	}
+
+	/* Horizontal scroll container */
+	.gallery-scroll {
+		display: flex;
+		gap: 14px;
+		overflow-x: auto;
+		padding-bottom: 12px;
+		scroll-snap-type: x mandatory;
+		-webkit-overflow-scrolling: touch;
+	}
+
+	.gallery-scroll > :global(*) {
+		scroll-snap-align: start;
+	}
+
+	/* Hide scrollbar but keep functionality */
+	.gallery-scroll::-webkit-scrollbar {
+		height: 6px;
+	}
+
+	.gallery-scroll::-webkit-scrollbar-track {
+		background: rgba(148, 163, 184, 0.05);
+		border-radius: 3px;
+	}
+
+	.gallery-scroll::-webkit-scrollbar-thumb {
+		background: rgba(148, 163, 184, 0.15);
+		border-radius: 3px;
+	}
+
+	.gallery-scroll::-webkit-scrollbar-thumb:hover {
+		background: rgba(148, 163, 184, 0.25);
+	}
+
+	/* Group headers */
+	.gallery-group {
+		display: flex;
+		flex-direction: column;
+		gap: 10px;
+	}
+
+	.group-label {
+		font-size: 12px;
+		font-weight: 600;
+		color: var(--color-muted-foreground, #94a3b8);
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+		margin: 0;
+		display: flex;
+		align-items: center;
+		gap: 6px;
+	}
+
+	.group-dot {
+		width: 8px;
+		height: 8px;
+		border-radius: 50%;
+		flex-shrink: 0;
+	}
+</style>