diff --git a/resources/views/checkout/buy.blade.php b/resources/views/checkout/buy.blade.php
index cb36c03..525fc4c 100755
--- a/resources/views/checkout/buy.blade.php
+++ b/resources/views/checkout/buy.blade.php
@@ -1,91 +1,301 @@
 @extends('layouts.app')
+
 @section('content')
-<div class="hero-card">
-    <span class="eyebrow">SonarDesk</span>
-    <h1>Choose your licence</h1>
-    <p class="lead">Every subscription starts with a 7-day free trial. Cancel before the trial ends and you won't be charged.</p>
-    @if($paddleEnvironment === 'sandbox')<div class="sandbox-badge">Sandbox checkout — no real payment is taken</div>@endif
-</div>
+    <div class="hero-card">
+        <span class="eyebrow">SonarDesk</span>
+        <h1>Choose your licence</h1>
+        <p class="lead">
+            Every subscription starts with a 7-day free trial.
+            Cancel before the trial ends and you won't be charged.
+        </p>
 
-<div class="pricing-grid">
-@foreach($plans as $code => $plan)
-    <article class="price-card {{ str_starts_with($code, 'professional') ? 'featured' : '' }}">
-        <div>
-            <div class="plan-heading">
-                <div>
-                    <h2>{{ $plan['name'] }}</h2>
-                    <div class="muted">{{ $plan['billing'] }} billing</div>
-                </div>
-                @if($plan['billing'] === 'Annual')<span class="pill">Best value</span>@endif
+        @if($paddleEnvironment === 'sandbox')
+            <div class="sandbox-badge">
+                Sandbox checkout — no real payment is taken
             </div>
-            <div class="price" data-price-display="{{ $plan['price_id'] }}" data-billing="{{ strtolower($plan['billing']) }}">{{ $plan['display_price'] }}</div>
-            <ul class="features">
-                <li>7-day free trial</li>
-                <li>{{ $plan['activation_limit'] }} active Mac{{ $plan['activation_limit'] === 1 ? '' : 's' }}</li>
-                <li>Secure online activation</li>
-                <li>Licence management portal</li>
-            </ul>
-        </div>
-        <button class="checkout-button" type="button" data-price-id="{{ $plan['price_id'] }}" data-plan="{{ $plan['name'] }} {{ $plan['billing'] }}">Start free trial</button>
-    </article>
-@endforeach
-</div>
+        @endif
+    </div>
 
-<div class="card checkout-status" id="checkout-status" hidden>
-    <h2>Purchase received</h2>
-    <p>Paddle is confirming your subscription. Your SonarDesk licence key is generated by our licensing server and emailed to the address used at checkout. You can then activate it in <strong>SonarDesk → Settings → Licence</strong>.</p>
-    <p class="muted">Delivery normally follows the subscription webhook within moments. Check your junk folder if needed. You can also create a portal account with the same email address and resend the key from My licences.</p>
-    <a class="btn" href="{{ route('register') }}">Create portal account</a>
-</div>
+    <div class="pricing-grid">
+        @foreach($plans as $code => $plan)
+            <article class="price-card {{ str_starts_with($code, 'professional') ? 'featured' : '' }}">
+                <div>
+                    <div class="plan-heading">
+                        <div>
+                            <h2>{{ $plan['name'] }}</h2>
+                            <div class="muted">{{ $plan['billing'] }} billing</div>
+                        </div>
 
-<script src="https://cdn.paddle.com/paddle/v2/paddle.js"></script>
-<script>
-(() => {
-    const token = @json($paddleToken);
-    const environment = @json($paddleEnvironment);
-    if (environment === 'sandbox') Paddle.Environment.set('sandbox');
-    Paddle.Initialize({
-        token,
-        eventCallback(event) {
-            if (event && event.name === 'checkout.completed') {
-                document.getElementById('checkout-status').hidden = false;
-                document.getElementById('checkout-status').scrollIntoView({behavior: 'smooth', block: 'center'});
-            }
-        }
-    });
+                        @if($plan['billing'] === 'Annual')
+                            <span class="pill">Best value</span>
+                        @endif
+                    </div>
 
-    const priceElements = new Map(
-        Array.from(document.querySelectorAll('[data-price-display]')).map(element => [element.dataset.priceDisplay, element])
-    );
-    const previewItems = Array.from(priceElements.keys()).map(priceId => ({priceId, quantity: 1}));
-    Paddle.PricePreview({items: previewItems}).then(result => {
-        for (const item of (result?.data?.details?.lineItems ?? [])) {
-            const element = priceElements.get(item?.price?.id);
-            const formatted = item?.formattedTotals?.total ?? item?.formattedUnitTotals?.total;
-            if (!element || !formatted) continue;
-            const suffix = element.dataset.billing === 'annual' ? ' / year' : ' / month';
-            element.textContent = formatted + suffix;
-        }
-    }).catch(() => {
-        // Keep the server-rendered GBP fallback if Paddle pricing preview is unavailable.
-    });
+                    <div
+                        class="price"
+                        data-price-display="{{ $plan['price_id'] }}"
+                        data-billing="{{ strtolower($plan['billing']) }}"
+                    >
+                        {{ $plan['display_price'] }}
+                    </div>
 
-    document.querySelectorAll('.checkout-button').forEach(button => {
-        button.addEventListener('click', () => {
-            Paddle.Checkout.open({
-                items: [{priceId: button.dataset.priceId, quantity: 1}],
-                settings: {
-                    displayMode: 'overlay',
-                    theme: window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light',
-                    allowLogout: false
-                },
-                customData: {
-                    source: 'sonardesk-buy-page',
-                    plan: button.dataset.plan
+                    <ul class="features">
+                        <li>7-day free trial</li>
+                        <li>
+                            {{ $plan['activation_limit'] }}
+                            active Mac{{ $plan['activation_limit'] === 1 ? '' : 's' }}
+                        </li>
+                        <li>Secure online activation</li>
+                        <li>Licence management portal</li>
+                    </ul>
+                </div>
+
+                <button
+                    class="checkout-button"
+                    type="button"
+                    data-price-id="{{ $plan['price_id'] }}"
+                    data-plan="{{ $plan['name'] }} {{ $plan['billing'] }}"
+                >
+                    Start free trial
+                </button>
+            </article>
+        @endforeach
+    </div>
+
+    <div class="card checkout-status" id="checkout-status" hidden>
+        <h2>Purchase received</h2>
+
+        <p>
+            Paddle is confirming your subscription. Your SonarDesk licence key
+            is generated by our licensing server and emailed to the address used
+            at checkout. You can then activate it in
+            <strong>SonarDesk → Settings → Licence</strong>.
+        </p>
+
+        <p class="muted">
+            Delivery normally follows the subscription webhook within moments.
+            Check your junk folder if needed. You can also create a portal account
+            with the same email address and resend the key from My licences.
+        </p>
+
+        <a class="btn" href="{{ route('register') }}">
+            Create portal account
+        </a>
+    </div>
+
+    <div class="card" id="checkout-error" hidden>
+        <h2>Checkout unavailable</h2>
+
+        <p>
+            Paddle could not start the checkout. Please try again.
+        </p>
+
+        <p class="muted" id="checkout-error-detail"></p>
+    </div>
+
+    <script src="https://cdn.paddle.com/paddle/v2/paddle.js"></script>
+
+    <script>
+        (() => {
+            'use strict';
+
+            const token = @json($paddleToken);
+            const environment = @json($paddleEnvironment);
+
+            const errorPanel = document.getElementById('checkout-error');
+            const errorDetail = document.getElementById('checkout-error-detail');
+
+            function showCheckoutError(message) {
+                console.error('SONARDESK CHECKOUT ERROR:', message);
+
+                if (errorDetail) {
+                    errorDetail.textContent = message || 'Unknown checkout error.';
                 }
+
+                if (errorPanel) {
+                    errorPanel.hidden = false;
+
+                    errorPanel.scrollIntoView({
+                        behavior: 'smooth',
+                        block: 'center'
+                    });
+                }
+            }
+
+            function logPaddleEvent(event) {
+                console.log('PADDLE EVENT:', event);
+
+                if (
+                    event?.name === 'checkout.error' ||
+                    event?.name === 'checkout.warning' ||
+                    event?.name === 'checkout.payment.error'
+                ) {
+                    console.error('PADDLE ERROR:', {
+                        name: event?.name,
+                        type: event?.type,
+                        code: event?.code,
+                        detail: event?.detail,
+                        documentation_url: event?.documentation_url,
+                        errors: event?.errors,
+                        event: event
+                    });
+
+                    const code = event?.code
+                        ? `Code: ${event.code}`
+                        : 'Paddle checkout error';
+
+                    const detail = event?.detail
+                        ? ` — ${event.detail}`
+                        : '';
+
+                    showCheckoutError(code + detail);
+                }
+
+                if (event?.name === 'checkout.completed') {
+                    const status = document.getElementById('checkout-status');
+
+                    if (status) {
+                        status.hidden = false;
+
+                        status.scrollIntoView({
+                            behavior: 'smooth',
+                            block: 'center'
+                        });
+                    }
+                }
+            }
+
+            if (typeof Paddle === 'undefined') {
+                showCheckoutError('Paddle.js failed to load.');
+                return;
+            }
+
+            console.log('SONARDESK PADDLE CONFIG:', {
+                environment: environment,
+                tokenPresent: Boolean(token),
+                tokenPrefix: token ? token.substring(0, 5) : null
             });
-        });
-    });
-})();
-</script>
+
+            try {
+                if (environment === 'sandbox') {
+                    Paddle.Environment.set('sandbox');
+                }
+
+                Paddle.Initialize({
+                    token: token,
+                    eventCallback: logPaddleEvent
+                });
+
+                console.log('Paddle initialized successfully.');
+            } catch (error) {
+                console.error('PADDLE INITIALIZATION ERROR:', error);
+
+                showCheckoutError(
+                    error?.message || 'Paddle could not be initialized.'
+                );
+
+                return;
+            }
+
+            const priceElements = new Map(
+                Array.from(
+                    document.querySelectorAll('[data-price-display]')
+                ).map(element => [
+                    element.dataset.priceDisplay,
+                    element
+                ])
+            );
+
+            const previewItems = Array.from(priceElements.keys()).map(priceId => ({
+                priceId: priceId,
+                quantity: 1
+            }));
+
+            console.log('PADDLE PRICE PREVIEW ITEMS:', previewItems);
+
+            Paddle.PricePreview({
+                items: previewItems
+            })
+                .then(result => {
+                    console.log('PADDLE PRICE PREVIEW RESULT:', result);
+
+                    for (const item of (result?.data?.details?.lineItems ?? [])) {
+                        const element = priceElements.get(item?.price?.id);
+
+                        const formatted =
+                            item?.formattedTotals?.total ??
+                            item?.formattedUnitTotals?.total;
+
+                        if (!element || !formatted) {
+                            continue;
+                        }
+
+                        const suffix =
+                            element.dataset.billing === 'annual'
+                                ? ' / year'
+                                : ' / month';
+
+                        element.textContent = formatted + suffix;
+                    }
+                })
+                .catch(error => {
+                    console.error('PADDLE PRICE PREVIEW ERROR:', error);
+
+                    // Server-rendered GBP price remains visible.
+                });
+
+            document
+                .querySelectorAll('.checkout-button')
+                .forEach(button => {
+                    button.addEventListener('click', () => {
+                        const priceId = button.dataset.priceId;
+                        const plan = button.dataset.plan;
+
+                        console.log('OPENING PADDLE CHECKOUT:', {
+                            environment: environment,
+                            priceId: priceId,
+                            plan: plan
+                        });
+
+                        errorPanel.hidden = true;
+
+                        try {
+                            Paddle.Checkout.open({
+                                items: [
+                                    {
+                                        priceId: priceId,
+                                        quantity: 1
+                                    }
+                                ],
+
+                                settings: {
+                                    displayMode: 'overlay',
+                                    theme: window.matchMedia(
+                                        '(prefers-color-scheme: dark)'
+                                    ).matches
+                                        ? 'dark'
+                                        : 'light',
+                                    allowLogout: false
+                                },
+
+                                customData: {
+                                    source: 'sonardesk-buy-page',
+                                    plan: plan
+                                }
+                            });
+                        } catch (error) {
+                            console.error(
+                                'PADDLE CHECKOUT OPEN ERROR:',
+                                error
+                            );
+
+                            showCheckoutError(
+                                error?.message ||
+                                'Paddle could not open the checkout.'
+                            );
+                        }
+                    });
+                });
+        })();
+    </script>
 @endsection