feat: add official EmDash marketing template

- Marketing landing page with hero, features, testimonials, FAQ, pricing
- EmDash CMS with pages collection and marketing blocks
- Full seed data with all content sections
- Dockerfile with entrypoint for database persistence
- Responsive design with CSS variables

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

src/styles/theme.css

@@ -0,0 +1,70 @@
+/* theme.css -- Design tokens for the marketing template */
+
+:root {
+	/* --- Colors --- */
+	--color-bg: #ffffff;
+	--color-text: #0f172a;
+	--color-muted: #64748b;
+	--color-border: #e2e8f0;
+	--color-surface: #f8fafc;
+	--color-primary: #6366f1;
+	--color-primary-dark: #4f46e5;
+	--color-primary-light: #818cf8;
+	--color-accent: #f472b6;
+	--color-accent-light: #f9a8d4;
+	--color-success: #22c55e;
+	--color-warning: #f59e0b;
+
+	/* --- Typography --- */
+	--font-mono: ui-monospace, "SF Mono", monospace;
+	--font-size-xs: 0.75rem;
+	--font-size-sm: 0.875rem;
+	--font-size-base: 1rem;
+	--font-size-lg: 1.125rem;
+	--font-size-xl: 1.25rem;
+	--font-size-2xl: 1.5rem;
+	--font-size-3xl: 2rem;
+	--font-size-4xl: 2.5rem;
+	--font-size-5xl: 3.5rem;
+	--font-size-6xl: 4.5rem;
+
+	/* --- Spacing --- */
+	--spacing-xs: 0.25rem;
+	--spacing-sm: 0.5rem;
+	--spacing-md: 1rem;
+	--spacing-lg: 1.5rem;
+	--spacing-xl: 2rem;
+	--spacing-2xl: 3rem;
+	--spacing-3xl: 4rem;
+	--spacing-4xl: 6rem;
+	--spacing-5xl: 8rem;
+
+	/* --- Layout --- */
+	--max-width: 720px;
+	--wide-width: 1200px;
+	--radius-sm: 6px;
+	--radius: 10px;
+	--radius-lg: 16px;
+	--radius-full: 9999px;
+
+	/* --- Transitions --- */
+	--transition-fast: 150ms ease;
+	--transition-base: 200ms ease;
+	--transition-slow: 300ms ease;
+
+	/* --- Shadows --- */
+	--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
+	--shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
+	--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
+	--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
+}
+
+@media (prefers-color-scheme: dark) {
+	:root {
+		--color-bg: #0f172a;
+		--color-text: #f8fafc;
+		--color-muted: #94a3b8;
+		--color-border: #1e293b;
+		--color-surface: #1e293b;
+	}
+}