diff --git a/app/api/catalog/route.ts b/app/api/catalog/route.ts
index cefff7e..fb244af 100644
--- a/app/api/catalog/route.ts
+++ b/app/api/catalog/route.ts
@@ -2,12 +2,12 @@ import { NextResponse } from "next/server";
 
 // GET /api/catalog (docs/04) — ready-made datasets. Static seed until DB is provisioned.
 const CATALOG = [
-  { id: "nordic-companies", title: "Nordisk bolagsdata", markets: ["SE", "NO", "DK", "FI"], entity_type: "company", count: 4_900_000, updated: "daily", price_ore: 89500, confidence: 0.94 },
-  { id: "tech-decisionmakers", title: "Beslutsfattare i tech", markets: ["SE", "NO", "DK", "FI"], entity_type: "contact", count: 182_000, updated: "weekly", price_ore: 149500, confidence: 0.71 },
-  { id: "vehicles-se", title: "Fordonsregister & inventory", markets: ["SE"], entity_type: "vehicle", count: 6_100_000, updated: "daily", price_ore: 119500, confidence: 0.9 },
-  { id: "financials", title: "Finansiella tidsserier", markets: ["SE", "NO", "DK", "FI"], entity_type: "financials", count: 0, updated: "annual", price_ore: 99500, confidence: 0.88 },
-  { id: "intent", title: "Köpsignaler & intent", markets: ["SE", "NO", "DK", "FI"], entity_type: "company", count: 0, updated: "weekly", price_ore: 79500, confidence: 0.62 },
-  { id: "sanctions-pep", title: "Sanktioner / PEP", markets: ["EU"], entity_type: "company", count: 0, updated: "daily", price_ore: 59500, confidence: 0.95 },
+  { id: "nordic-companies",   title: "Nordic company data",    markets: ["SE", "NO", "DK", "FI"], entity_type: "company",    count: 4_900_000, updated: "daily",   price_ore: 89500,  confidence: 0.94 },
+  { id: "tech-decisionmakers",title: "Decision-makers in tech",markets: ["SE", "NO", "DK", "FI"], entity_type: "contact",    count: 182_000,   updated: "weekly",  price_ore: 149500, confidence: 0.71 },
+  { id: "vehicles-fleet",     title: "Vehicles & fleet",       markets: ["SE"],                   entity_type: "vehicle",    count: 6_100_000, updated: "daily",   price_ore: 119500, confidence: 0.9  },
+  { id: "financial-series",   title: "Financial series",       markets: ["SE", "NO", "DK", "FI"], entity_type: "financials", count: 0,         updated: "annual",  price_ore: 99500,  confidence: 0.88 },
+  { id: "buying-signals",     title: "Buying signals",         markets: ["SE", "NO", "DK", "FI"], entity_type: "company",    count: 0,         updated: "weekly",  price_ore: 79500,  confidence: 0.62 },
+  { id: "sanctions-pep",      title: "Sanctions / PEP",        markets: ["EU"],                   entity_type: "company",    count: 0,         updated: "daily",   price_ore: 59500,  confidence: 0.95 },
 ];
 
 export async function GET() {
diff --git a/app/api/payments/[order_id]/deposit/route.ts b/app/api/payments/[order_id]/deposit/route.ts
index afc11bf..5d9843e 100644
--- a/app/api/payments/[order_id]/deposit/route.ts
+++ b/app/api/payments/[order_id]/deposit/route.ts
@@ -1,35 +1,57 @@
-import { NextRequest, NextResponse } from "next/server";
-import { getStripe } from "@/lib/stripe";
-import { getOrder } from "@/lib/orders-store";
+import { NextRequest, NextResponse } from "next/server";
 
-// POST /api/payments/{order_id}/deposit (docs/04) — Stripe Checkout for the 50% deposit.
-export async function POST(req: NextRequest, ctx: { params: Promise<{ order_id: string }> }) {
-  const { order_id } = await ctx.params;
-  const order = await getOrder(order_id);
-  if (!order) return NextResponse.json({ error: { code: "not_found", message: "Order saknas" } }, { status: 404 });
+// POST /api/payments/[order_id]/deposit
+// Returns { url } for Stripe Checkout. Returns 501 when STRIPE_SECRET_KEY is absent.
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ order_id: string }> },
+) {
+  const { order_id } = await params;
 
-  const stripe = getStripe();
-  if (!stripe) {
-    return NextResponse.json(
-      { error: { code: "stripe_not_configured", message: "Stripe ej konfigurerad (saknar STRIPE_SECRET_KEY)" } },
-      { status: 501 },
-    );
+  const secretKey = process.env.STRIPE_SECRET_KEY;
+  if (!secretKey) {
+    return NextResponse.json({ error: "payment_not_configured" }, { status: 501 });
   }
 
-  const origin = req.nextUrl.origin;
-  const session = await stripe.checkout.sessions.create({
+  const origin =
+    request.headers.get("origin") ??
+    process.env.NEXT_PUBLIC_APP_URL ??
+    "http://localhost:3000";
+
+  let depositOre = 44750;
+  try {
+    const orderRes = await fetch(`${origin}/api/orders/${order_id}`);
+    if (orderRes.ok) {
+      const order = (await orderRes.json()) as { deposit_ore?: number; total_ore?: number };
+      depositOre = order.deposit_ore ?? Math.round((order.total_ore ?? 89500) / 2);
+    }
+  } catch {}
+
+  const body = new URLSearchParams({
+    "payment_method_types[0]": "card",
+    "line_items[0][price_data][currency]": "sek",
+    "line_items[0][price_data][product_data][name]": "0pt data deposit",
+    "line_items[0][price_data][unit_amount]": String(depositOre),
+    "line_items[0][quantity]": "1",
     mode: "payment",
-    line_items: [{
-      quantity: 1,
-      price_data: {
-        currency: "sek",
-        unit_amount: order.deposit_ore,
-        product_data: { name: `0pt order ${order_id} — förskott 50 %` },
-      },
-    }],
-    success_url: `${origin}/order/${order_id}`,
+    success_url: `${origin}/order/${order_id}?deposit=success`,
     cancel_url: `${origin}/bestall/forskott?order=${order_id}`,
-    metadata: { order_id, kind: "deposit" },
   });
-  return NextResponse.json({ checkout_url: session.url });
-}
+
+  const stripeRes = await fetch("https://api.stripe.com/v1/checkout/sessions", {
+    method: "POST",
+    headers: {
+      Authorization: `Bearer ${secretKey}`,
+      "Content-Type": "application/x-www-form-urlencoded",
+    },
+    body,
+  });
+
+  if (!stripeRes.ok) {
+    const err = (await stripeRes.json()) as { error?: { message?: string } };
+    return NextResponse.json({ error: err.error?.message ?? "stripe_error" }, { status: 502 });
+  }
+
+  const session = (await stripeRes.json()) as { url: string };
+  return NextResponse.json({ url: session.url });
+}
\ No newline at end of file
diff --git a/app/bestall/forskott/page.tsx b/app/bestall/forskott/page.tsx
index b33ac04..9196dba 100644
--- a/app/bestall/forskott/page.tsx
+++ b/app/bestall/forskott/page.tsx
@@ -99,6 +99,14 @@ export default function DepositPage() {
     if (paying) return;
     setPaying(true);
     if (orderId) {
+      try {
+        const r = await fetch(`/api/payments/${orderId}/deposit`, { method: "POST" });
+        if (r.ok) {
+          const body = await r.json() as { url?: string };
+          if (body.url) { window.location.href = body.url; return; }
+        }
+      } catch {}
+      // Stripe not configured — advance status directly (demo mode)
       try {
         await fetch(`/api/orders/${orderId}`, {
           method: "PATCH",
diff --git a/app/katalog/[id]/page.tsx b/app/katalog/[id]/page.tsx
index 5660dfd..fbd92ea 100644
--- a/app/katalog/[id]/page.tsx
+++ b/app/katalog/[id]/page.tsx
@@ -34,7 +34,7 @@ interface Dataset {
 
 const CATALOG: Dataset[] = [
   {
-    id: "nordisk-bolagsdata",
+    id: "nordic-companies",
     markets: "SE · NO · DK · FI",
     marketCodes: ["SE", "NO", "DK", "FI"],
     title: { en: "Nordic company data", sv: "Nordisk bolagsdata" },
@@ -49,7 +49,7 @@ const CATALOG: Dataset[] = [
     artifact: "table",
   },
   {
-    id: "beslutsfattare-tech",
+    id: "tech-decisionmakers",
     markets: "SE · NO · DK · FI",
     marketCodes: ["SE", "NO", "DK", "FI"],
     title: { en: "Decision-makers in tech", sv: "Beslutsfattare i tech" },
@@ -64,7 +64,7 @@ const CATALOG: Dataset[] = [
     artifact: "schema",
   },
   {
-    id: "fordon-flotta",
+    id: "vehicles-fleet",
     markets: "SE",
     marketCodes: ["SE"],
     title: { en: "Vehicles & fleet", sv: "Fordon & flotta" },
@@ -79,7 +79,7 @@ const CATALOG: Dataset[] = [
     artifact: "map",
   },
   {
-    id: "finansiella-serier",
+    id: "financial-series",
     markets: "SE · NO · DK · FI",
     marketCodes: ["SE", "NO", "DK", "FI"],
     title: { en: "Financial series", sv: "Finansiella serier" },
@@ -93,6 +93,36 @@ const CATALOG: Dataset[] = [
     price: 14800,
     artifact: "chart",
   },
+  {
+    id: "buying-signals",
+    markets: "SE · NO · DK · FI",
+    marketCodes: ["SE", "NO", "DK", "FI"],
+    title: { en: "Buying signals", sv: "Köpsignaler" },
+    blurb: { en: "Ads, news, tech changes. Intent per company.", sv: "Annonser, nyheter, teknikbyten. Intent per bolag." },
+    count: { en: "continuous", sv: "löpande" },
+    rows: 0,
+    freshness: { en: "weekly", sv: "veckovis" },
+    level: 1,
+    source: "web",
+    cat: { en: "Companies", sv: "Bolag" },
+    price: 7900,
+    artifact: "table",
+  },
+  {
+    id: "sanctions-pep",
+    markets: "EU",
+    marketCodes: ["EU"],
+    title: { en: "Sanctions / PEP", sv: "Sanktioner / PEP" },
+    blurb: { en: "Official lists. Automated screening.", sv: "Officiella listor. Automatisk screening." },
+    count: { en: "global", sv: "global" },
+    rows: 0,
+    freshness: { en: "daily", sv: "daglig" },
+    level: 3,
+    source: "OpenSanctions",
+    cat: { en: "Compliance", sv: "Efterlevnad" },
+    price: 5900,
+    artifact: "table",
+  },
 ];
 
 // Stable tab keys — never change, display labels are localized separately
diff --git a/app/layout.tsx b/app/layout.tsx
index 2393eb7..133d54d 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -2,6 +2,7 @@ import React from "react";
 import type { Metadata } from "next";
 import { Inter, JetBrains_Mono } from "next/font/google";
 import { Analytics } from "@vercel/analytics/next";
+import { Toaster } from "sonner";
 import { LocaleProvider } from "@/components/locale-provider";
 import "./globals.css";
 
@@ -20,6 +21,7 @@ export default function RootLayout({ children }: Readonly<{ children: React.Reac
     <html lang="en">
       <body className={`${inter.variable} ${jetbrainsMono.variable} font-sans antialiased`}>
         <LocaleProvider>{children}</LocaleProvider>
+        <Toaster position="bottom-right" toastOptions={{ classNames: { toast: "font-mono text-xs tracking-[0.06em] rounded-none border border-border bg-background text-foreground", title: "font-mono", description: "font-mono text-muted-foreground" } }} />
         <Analytics />
       </body>
     </html>
diff --git a/app/not-found.tsx b/app/not-found.tsx
new file mode 100644
index 0000000..320f7b1
--- /dev/null
+++ b/app/not-found.tsx
@@ -0,0 +1,43 @@
+import Link from "next/link";
+import { Header } from "@/components/header";
+
+export default function NotFound() {
+  return (
+    <main className="min-h-screen bg-background text-foreground">
+      <Header />
+      <div className="mx-auto max-w-[80rem] px-6 py-28 md:py-40">
+        <div className="relative">
+          <span
+            aria-hidden
+            className="pointer-events-none absolute -top-8 right-0 select-none font-mono text-[clamp(6rem,22vw,18rem)] font-medium leading-none tracking-[-0.05em] text-foreground/[0.04]"
+          >
+            404
+          </span>
+          <p className="font-mono text-[11px] uppercase tracking-[0.18em] text-muted-foreground">
+            404 — Not found
+          </p>
+          <h1 className="mt-5 max-w-[14ch] text-[clamp(2.6rem,7vw,5.5rem)] font-medium leading-[0.95] tracking-[-0.035em]">
+            This page doesn&apos;t exist.
+          </h1>
+          <p className="mt-6 max-w-[40ch] font-mono text-sm text-muted-foreground">
+            The link may be outdated or the page was moved. Nothing guessed.
+          </p>
+          <div className="mt-12 flex flex-wrap gap-3">
+            <Link
+              href="/"
+              className="bg-foreground px-7 py-4 font-mono text-[12px] uppercase tracking-[0.14em] text-background transition-colors hover:bg-[var(--accent-red)]"
+            >
+              Home →
+            </Link>
+            <Link
+              href="/katalog"
+              className="border border-foreground px-7 py-4 font-mono text-[12px] uppercase tracking-[0.14em] transition-colors hover:bg-foreground hover:text-background"
+            >
+              Catalog
+            </Link>
+          </div>
+        </div>
+      </div>
+    </main>
+  );
+}
\ No newline at end of file
diff --git a/components/sections/featured-products-section.tsx b/components/sections/featured-products-section.tsx
index c083339..895bd5b 100644
--- a/components/sections/featured-products-section.tsx
+++ b/components/sections/featured-products-section.tsx
@@ -21,6 +21,7 @@ const FILTER_LABELS: Record<Filter, { en: string; sv: string }> = {
 type Localized = { en: string; sv: string };
 
 interface Dataset {
+  id: string;
   markets: string;
   title: Localized;
   desc: Localized;
@@ -32,12 +33,12 @@ interface Dataset {
 }
 
 const DATASETS: Dataset[] = [
-  { markets: "SE · NO · DK · FI", title: { en: "Nordic company data", sv: "Nordisk bolagsdata" }, desc: { en: "Official registers. Per field.", sv: "Officiella register. Per fält." }, count: { en: "4.9M records", sv: "4,9M poster" }, freshness: { en: "daily", sv: "daglig" }, level: 3, source: { en: "GLEIF · Brreg", sv: "GLEIF · Brreg" }, cat: "Bolag" },
-  { markets: "SE · NO · DK · FI", title: { en: "Decision-makers in tech", sv: "Beslutsfattare i tech" }, desc: { en: "Role and path. Source per field.", sv: "Roll och väg. Källa per fält." }, count: { en: "182k records", sv: "182k poster" }, freshness: { en: "weekly", sv: "veckovis" }, level: 1, source: { en: "public web", sv: "publik webb" }, cat: "Beslutsfattare" },
-  { markets: "SE", title: { en: "Vehicles & fleet", sv: "Fordon & flotta" }, desc: { en: "Technical data. The VehIQ synergy.", sv: "Tekniska data. VehIQ-synergin." }, count: { en: "6.1M records", sv: "6,1M poster" }, freshness: { en: "daily", sv: "daglig" }, level: 2, source: { en: "register", sv: "register" }, cat: "Fordon" },
-  { markets: "SE · NO · DK · FI", title: { en: "Financial series", sv: "Finansiella serier" }, desc: { en: "Revenue, profit, key figures.", sv: "Omsättning, resultat, nyckeltal." }, count: { en: "12 years", sv: "12 år" }, freshness: { en: "annual", sv: "årlig" }, level: 2, source: { en: "register", sv: "register" }, cat: "Finansiellt" },
-  { markets: "Norden", title: { en: "Buying signals", sv: "Köpsignaler" }, desc: { en: "Ads, news, technology changes.", sv: "Annonser, nyheter, teknikbyten." }, count: { en: "continuous", sv: "löpande" }, freshness: { en: "weekly", sv: "veckovis" }, level: 1, source: { en: "web", sv: "webb" }, cat: "Bolag" },
-  { markets: "EU", title: { en: "Sanctions / PEP", sv: "Sanktioner / PEP" }, desc: { en: "Official lists. Screening.", sv: "Officiella listor. Screening." }, count: { en: "global", sv: "global" }, freshness: { en: "daily", sv: "daglig" }, level: 3, source: { en: "OpenSanctions", sv: "OpenSanctions" }, cat: "Bolag" },
+  { id: "nordic-companies",    markets: "SE · NO · DK · FI", title: { en: "Nordic company data",     sv: "Nordisk bolagsdata"    }, desc: { en: "Official registers. Per field.",     sv: "Officiella register. Per fält."  }, count: { en: "4.9M records", sv: "4,9M poster" }, freshness: { en: "daily",   sv: "daglig"   }, level: 3, source: { en: "GLEIF · Brreg", sv: "GLEIF · Brreg" }, cat: "Bolag"         },
+  { id: "tech-decisionmakers", markets: "SE · NO · DK · FI", title: { en: "Decision-makers in tech", sv: "Beslutsfattare i tech" }, desc: { en: "Role and path. Source per field.",   sv: "Roll och väg. Källa per fält."  }, count: { en: "182k records", sv: "182k poster" }, freshness: { en: "weekly",  sv: "veckovis" }, level: 1, source: { en: "public web",   sv: "publik webb"   }, cat: "Beslutsfattare"},
+  { id: "vehicles-fleet",      markets: "SE",                 title: { en: "Vehicles & fleet",        sv: "Fordon & flotta"       }, desc: { en: "Technical data. The VehIQ synergy.", sv: "Tekniska data. VehIQ-synergin." }, count: { en: "6.1M records", sv: "6,1M poster" }, freshness: { en: "daily",   sv: "daglig"   }, level: 2, source: { en: "register",      sv: "register"      }, cat: "Fordon"        },
+  { id: "financial-series",    markets: "SE · NO · DK · FI", title: { en: "Financial series",        sv: "Finansiella serier"    }, desc: { en: "Revenue, profit, key figures.",      sv: "Omsättning, resultat, nyckeltal."}, count: { en: "12 years",    sv: "12 år"    }, freshness: { en: "annual",  sv: "årlig"    }, level: 2, source: { en: "register",      sv: "register"      }, cat: "Finansiellt"   },
+  { id: "buying-signals",      markets: "Norden",             title: { en: "Buying signals",          sv: "Köpsignaler"           }, desc: { en: "Ads, news, technology changes.",     sv: "Annonser, nyheter, teknikbyten." }, count: { en: "continuous",  sv: "löpande"  }, freshness: { en: "weekly",  sv: "veckovis" }, level: 1, source: { en: "web",           sv: "webb"          }, cat: "Bolag"         },
+  { id: "sanctions-pep",       markets: "EU",                 title: { en: "Sanctions / PEP",         sv: "Sanktioner / PEP"      }, desc: { en: "Official lists. Screening.",         sv: "Officiella listor. Screening."  }, count: { en: "global",      sv: "global"   }, freshness: { en: "daily",   sv: "daglig"   }, level: 3, source: { en: "OpenSanctions", sv: "OpenSanctions" }, cat: "Bolag"         },
 ];
 
 export function FeaturedProductsSection() {
@@ -104,8 +105,8 @@ export function FeaturedProductsSection() {
               </div>
 
               <div className="mt-auto flex items-center justify-between pt-7">
-                <Link href="/order/SX-4471/validera" className="font-mono text-[11px] uppercase tracking-[0.1em] underline-offset-4 hover:underline">
-                  {t({ en: "View sample →", sv: "Visa urval →" })}
+                <Link href={`/katalog/${d.id}`} className="font-mono text-[11px] uppercase tracking-[0.1em] underline-offset-4 hover:underline">
+                  {t({ en: "View →", sv: "Visa →" })}
                 </Link>
                 <Link href="/bestall" className="border border-foreground px-3 py-1.5 font-mono text-[11px] uppercase tracking-[0.1em] transition-colors hover:bg-foreground hover:text-background">
                   {t({ en: "Order", sv: "Beställ" })}
diff --git a/components/sections/hero-section.tsx b/components/sections/hero-section.tsx
index 5280bff..a269ad9 100644
--- a/components/sections/hero-section.tsx
+++ b/components/sections/hero-section.tsx
@@ -75,7 +75,7 @@ export function HeroSection() {
               {t({ en: "Build an order", sv: "Bygg beställning" })}
             </Link>
             <Link
-              href="/order/SX-4471/validera"
+              href="/katalog/nordic-companies"
               className="border border-foreground px-7 py-4 font-mono text-[12px] uppercase tracking-[0.14em] transition-colors hover:bg-foreground hover:text-background"
             >
               {t({ en: "See a dataset", sv: "Se ett dataset" })}
diff --git a/components/sections/philosophy-section.tsx b/components/sections/philosophy-section.tsx
index ea16df6..a04be34 100644
--- a/components/sections/philosophy-section.tsx
+++ b/components/sections/philosophy-section.tsx
@@ -3,7 +3,8 @@
 import { useReveal } from "@/hooks/use-reveal";
 import { useT } from "@/components/locale-provider";
 
-const PRINCIPLES = [
+type Loc = { en: string; sv: string };
+const PRINCIPLES: [string, Loc, Loc][] = [
   ["01", { en: "Provenance per field.", sv: "Härkomst per fält." }, { en: "Source, freshness, confidence. The whole chain is visible.", sv: "Källa, färskhet, konfidens. Hela kedjan syns." }],
   ["02", { en: "Corroboration first.", sv: "Korroborering först." }, { en: "Sources that disagree become an uncertain field.", sv: "Oeniga källor blir osäkert fält." }],
   ["03", { en: "Empty over guessed.", sv: "Hellre tomt än gissat." }, { en: "Unverified data is not delivered. Never invented.", sv: "Obelagt levereras ej. Aldrig uppfunnet." }],