feat: add app screenshots, lightbox, and polish landing page

- 6 screenshots (3 desktop + 3 mobile) with real app data
- Click-to-zoom lightbox on all screenshots
- Align header logo color (gold) between website and app
- Remove placeholder images

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

website/index.html

@@ -70,7 +70,7 @@
 					</a>
 				</div>
 				<div class="hero-screenshot animate-in delay-3">
-					<div class="screenshot-placeholder"></div>
+					<img src="assets/screenshot-grid.png" alt="Crumbs notes grid view showing colorful note cards with checklists, tags, and rich text" width="1280" height="800" loading="eager">
 				</div>
 			</div>
 		</section>
@@ -142,18 +142,34 @@
 	<section class="screenshots" id="screenshots">
 		<div class="container">
 			<h2 class="animate-in">See it in action</h2>
+			<h3 class="screenshots-subtitle animate-in">Desktop</h3>
 			<div class="screenshots-grid">
 				<div class="screenshot-card animate-in delay-1">
-					<div class="screenshot-placeholder"></div>
+					<img src="assets/screenshot-grid.png" alt="Notes grid view with colorful cards, checklists, and tags" width="1280" height="800" loading="lazy">
 					<div class="screenshot-label">Notes grid view</div>
 				</div>
 				<div class="screenshot-card animate-in delay-2">
-					<div class="screenshot-placeholder"></div>
+					<img src="assets/screenshot-editor.png" alt="Rich text editor with formatting toolbar" width="1280" height="800" loading="lazy">
 					<div class="screenshot-label">Rich text editor</div>
 				</div>
 				<div class="screenshot-card animate-in delay-3">
-					<div class="screenshot-placeholder"></div>
-					<div class="screenshot-label">Mobile view</div>
+					<img src="assets/screenshot-tags.png" alt="Tag filtering showing bretzel-tagged notes" width="1280" height="800" loading="lazy">
+					<div class="screenshot-label">Tag filtering</div>
+				</div>
+			</div>
+			<h3 class="screenshots-subtitle animate-in">Mobile</h3>
+			<div class="screenshots-grid screenshots-grid-mobile">
+				<div class="screenshot-card screenshot-card-mobile animate-in delay-1">
+					<img src="assets/screenshot-mobile-grid.png" alt="Mobile grid view with notes and tags" width="390" height="844" loading="lazy">
+					<div class="screenshot-label">Notes view</div>
+				</div>
+				<div class="screenshot-card screenshot-card-mobile animate-in delay-2">
+					<img src="assets/screenshot-mobile-editor.png" alt="Mobile checklist editor" width="390" height="844" loading="lazy">
+					<div class="screenshot-label">Checklist editor</div>
+				</div>
+				<div class="screenshot-card screenshot-card-mobile animate-in delay-3">
+					<img src="assets/screenshot-mobile-sidebar.png" alt="Mobile sidebar with tags" width="390" height="844" loading="lazy">
+					<div class="screenshot-label">Sidebar & tags</div>
 				</div>
 			</div>
 		</div>
@@ -209,7 +225,32 @@
 		</div>
 	</footer>
 
+	<!-- Lightbox -->
+	<div class="lightbox" id="lightbox" role="dialog" aria-label="Image preview">
+		<img src="" alt="">
+	</div>
+
 	<script>
+		// Lightbox
+		const lightbox = document.getElementById('lightbox');
+		const lightboxImg = lightbox.querySelector('img');
+
+		document.querySelectorAll('.screenshot-card img, .hero-screenshot img').forEach(img => {
+			img.addEventListener('click', () => {
+				lightboxImg.src = img.src;
+				lightboxImg.alt = img.alt;
+				lightbox.classList.add('active');
+			});
+		});
+
+		lightbox.addEventListener('click', () => {
+			lightbox.classList.remove('active');
+		});
+
+		document.addEventListener('keydown', (e) => {
+			if (e.key === 'Escape') lightbox.classList.remove('active');
+		});
+
 		// Mobile nav toggle
 		const toggle = document.querySelector('.nav-toggle');
 		const navLinks = document.querySelector('.nav-links');

website/styles.css

@@ -126,7 +126,7 @@ section {
 	display: flex;
 	align-items: center;
 	gap: 0.75rem;
-	color: var(--text);
+	color: var(--primary);
 	font-family: 'Press Start 2P', cursive;
 	font-size: 1rem;
 }
@@ -404,13 +404,35 @@ section {
 .screenshots h2 {
 	text-align: center;
 	font-size: clamp(0.9rem, 2.5vw, 1.25rem);
-	margin-bottom: 3rem;
+	margin-bottom: 2rem;
+}
+
+.screenshots-subtitle {
+	text-align: center;
+	font-size: 0.7rem;
+	color: var(--text-muted);
+	text-transform: uppercase;
+	letter-spacing: 0.1em;
+	margin-bottom: 1.5rem;
 }
 
 .screenshots-grid {
 	display: grid;
 	grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
 	gap: 1.5rem;
+	margin-bottom: 3rem;
+}
+
+.screenshots-grid-mobile {
+	grid-template-columns: repeat(3, 1fr);
+	max-width: 48rem;
+	margin-left: auto;
+	margin-right: auto;
+}
+
+.screenshot-card-mobile {
+	max-width: 14rem;
+	justify-self: center;
 }
 
 .screenshot-card {
@@ -569,6 +591,46 @@ section {
 	padding: 0.2rem 0.6rem;
 }
 
+/* ── Lightbox ── */
+.lightbox {
+	position: fixed;
+	inset: 0;
+	z-index: 200;
+	background: rgba(26, 26, 46, 0.85);
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	padding: 2rem;
+	cursor: zoom-out;
+	opacity: 0;
+	visibility: hidden;
+	transition: opacity 150ms ease-out, visibility 150ms ease-out;
+}
+
+.lightbox.active {
+	opacity: 1;
+	visibility: visible;
+}
+
+.lightbox img {
+	max-width: 100%;
+	max-height: 90vh;
+	border: 2px solid var(--border-subtle);
+	border-radius: 2px;
+	box-shadow: 4px 4px 0px rgba(0, 0, 0, 0.3);
+	transform: scale(0.95);
+	transition: transform 150ms ease-out;
+}
+
+.lightbox.active img {
+	transform: scale(1);
+}
+
+.screenshot-card img,
+.hero-screenshot img {
+	cursor: zoom-in;
+}
+
 /* ── Animations ── */
 @keyframes fade-up {
 	from {
@@ -634,6 +696,14 @@ section {
 	.screenshots-grid {
 		grid-template-columns: 1fr;
 	}
+
+	.screenshots-grid-mobile {
+		grid-template-columns: repeat(3, 1fr);
+	}
+
+	.screenshot-card-mobile {
+		max-width: none;
+	}
 }
 
 @media (max-width: 480px) {