fix(landing): remove Free tier, add playground, update CTAs (BUG-080)

- Remove Free tier pricing card entirely
- Remove signup modal (no more free signups)
- Add interactive playground section (paste HTML → watermarked PDF)
- Hero CTAs: 'Try Demo →' and 'Get Pro API Key — €9/mo'
- Pricing: single Pro card at €9/mo
- Update structured data to remove Free offer

templates/pages/index.html

@@ -16,7 +16,7 @@
 <meta name="twitter:image" content="https://docfast.dev/og-image.png">
 <link rel="canonical" href="https://docfast.dev">
 <script type="application/ld+json">
-{"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"0","priceCurrency":"EUR","name":"Free","description":"100 PDFs/month"},{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"5,000 PDFs per month","billingIncrement":"P1M"}]}
+{"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"5,000 PDFs per month","billingIncrement":"P1M"}]}
 </script>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>⚡</text></svg>">
 <style>
@@ -137,12 +137,8 @@ footer .container { display: flex; align-items: center; justify-content: space-b
 .modal .close { position: absolute; top: 16px; right: 20px; color: var(--muted); font-size: 1.4rem; cursor: pointer; background: none; border: none; transition: color 0.2s; }
 .modal .close:hover { color: var(--fg); }
 
-/* Signup states */
-#signupInitial, #signupLoading, #signupVerify, #signupResult { display: none; }
-#signupInitial.active { display: block; }
-#signupLoading.active { display: flex; flex-direction: column; align-items: center; padding: 40px 0; text-align: center; }
-#signupResult.active { display: block; }
-#signupVerify.active { display: block; }
+/* Playground */
+#demoHtml:focus { border-color: var(--accent); outline: none; }
 .spinner { width: 36px; height: 36px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; margin-bottom: 16px; }
 @keyframes spin { to { transform: rotate(360deg); } }
 
@@ -289,8 +285,8 @@ html, body {
     <h1>HTML to <span class="gradient">PDF</span><br>in one API call</h1>
     <p>Convert HTML, Markdown, or URLs to pixel-perfect PDFs. Built-in templates for invoices &amp; receipts. No headless browser headaches.</p>
     <div class="hero-actions">
-      <button class="btn btn-primary" id="btn-signup">Get Free API Key →</button>
-      <a href="/docs" class="btn btn-secondary">Read the Docs</a>
+      <a href="#playground" class="btn btn-primary">Try Demo →</a>
+      <button class="btn btn-secondary" id="btn-checkout-hero">Get Pro API Key — €9/mo</button>
     </div>
     <p style="margin-top:16px;color:var(--muted);font-size:0.9rem;">Already have an account? <a href="#" class="open-recover" style="color:var(--accent);">Lost your API key? Recover it →</a></p>
 
@@ -385,34 +381,42 @@ html, body {
   </div>
 </section>
 
+<section class="playground" id="playground" style="padding:80px 0;">
+  <div class="container">
+    <h2 class="section-title">Try it now</h2>
+    <p class="section-sub">Paste HTML, get a watermarked PDF. No signup required.</p>
+    <div style="max-width:660px;margin:0 auto;">
+      <textarea id="demoHtml" rows="6" placeholder="<h1>Hello World</h1><p>Paste your HTML here…</p>" style="width:100%;padding:16px;border:1px solid var(--border);background:var(--card);color:var(--fg);border-radius:var(--radius);font-family:'SF Mono','Fira Code',monospace;font-size:0.85rem;resize:vertical;margin-bottom:16px;"></textarea>
+      <div style="display:flex;gap:12px;align-items:center;flex-wrap:wrap;">
+        <button class="btn btn-primary" id="demoGenerateBtn">Generate PDF →</button>
+        <span id="demoStatus" style="color:var(--muted);font-size:0.9rem;"></span>
+      </div>
+      <div class="signup-error" id="demoError" style="margin-top:12px;"></div>
+      <div id="demoResult" style="display:none;margin-top:16px;padding:16px;background:var(--card);border:1px solid var(--accent);border-radius:var(--radius);">
+        <p style="margin:0;">✅ PDF generated! <a id="demoDownload" href="#" download="docfast-demo.pdf" style="font-weight:600;">Download PDF →</a></p>
+        <p style="margin:8px 0 0;color:var(--muted);font-size:0.85rem;">Demo PDFs include a watermark. Get a Pro key for clean output.</p>
+      </div>
+    </div>
+  </div>
+</section>
+
 <section class="pricing" id="pricing">
   <div class="container">
     <h2 class="section-title">Simple, transparent pricing</h2>
-    <p class="section-sub">Start free. Upgrade when you're ready. No surprise charges.</p>
-    <div class="pricing-grid">
-      <div class="price-card">
-        <div class="price-name">Free</div>
-        <div class="price-amount">€0<span> /mo</span></div>
-        <div class="price-desc">Perfect for side projects and testing</div>
-        <ul class="price-features">
-          <li>100 PDFs per month</li>
-          <li>All conversion endpoints</li>
-          <li>All templates included</li>
-          <li>Rate limiting: 10 req/min</li>
-        </ul>
-        <button class="btn btn-secondary" style="width:100%" id="btn-signup-2">Get Free API Key</button>
-      </div>
+    <p class="section-sub">One plan. Everything included. No surprises.</p>
+    <div style="max-width:400px;margin:0 auto;">
       <div class="price-card featured">
         <div class="price-name">Pro</div>
         <div class="price-amount">€9<span> /mo</span></div>
         <div class="price-desc">For production apps and businesses</div>
         <ul class="price-features">
-<li>5,000 PDFs per month</li>
+          <li>5,000 PDFs per month</li>
           <li>All conversion endpoints</li>
           <li>All templates included</li>
+          <li>No watermarks</li>
           <li>Priority support (<a href="mailto:support@docfast.dev">support@docfast.dev</a>)</li>
         </ul>
-        <button class="btn btn-primary" style="width:100%" id="btn-checkout">Get Started →</button>
+        <button class="btn btn-primary" style="width:100%" id="btn-checkout">Get Pro API Key — €9/mo</button>
       </div>
     </div>
   </div>
@@ -420,50 +424,6 @@ html, body {
 
 {{> footer}}
 
-<!-- Signup Modal -->
-<div class="modal-overlay" id="signupModal" role="dialog" aria-label="Sign up for API key">
-  <div class="modal">
-    <button class="close" id="btn-close-signup">&times;</button>
-
-    <div id="signupInitial" class="active">
-      <h2>Get your free API key</h2>
-      <p>Enter your email to get started. No credit card required.</p>
-      <div class="signup-error" id="signupError"></div>
-      <input type="email" id="signupEmail" placeholder="your.email@example.com" style="width:100%;padding:12px;border:1px solid var(--border);background:var(--bg);color:var(--fg);border-radius:8px;font-size:0.9rem;margin-bottom:16px;" required>
-      <button class="btn btn-primary" style="width:100%" id="signupBtn">Generate API Key →</button>
-      <p style="margin-top:16px;color:var(--muted);font-size:0.8rem;text-align:center;">100 free PDFs/month • All endpoints included<br><a href="#" class="open-recover" style="color:var(--muted)">Lost your API key? Recover it →</a></p>
-    </div>
-
-    <div id="signupLoading">
-      <div class="spinner"></div>
-      <p style="color:var(--muted);margin:0">Generating your API key…</p>
-    </div>
-
-    <div id="signupVerify">
-      <h2>Enter verification code</h2>
-      <p>We sent a 6-digit code to <strong id="verifyEmailDisplay"></strong></p>
-      <div class="signup-error" id="verifyError"></div>
-      <input type="text" id="verifyCode" placeholder="123456" maxlength="6" pattern="[0-9]{6}" inputmode="numeric" style="width:100%;padding:14px;border:1px solid var(--border);background:var(--bg);color:var(--fg);border-radius:8px;font-size:1.4rem;letter-spacing:0.3em;text-align:center;margin-bottom:16px;font-family:monospace;" required>
-      <button class="btn btn-primary" style="width:100%" id="verifyBtn">Verify →</button>
-      <p style="margin-top:16px;color:var(--muted);font-size:0.8rem;text-align:center;">Code expires in 15 minutes</p>
-    </div>
-
-    <div id="signupResult" aria-live="polite">
-      <h2>🚀 Your API key is ready!</h2>
-      <div class="warning-box">
-        <span class="icon">⚠️</span>
-        <span>Save your API key securely. Lost it? <a href="#" class="open-recover" style="color:#fbbf24">Recover via email</a></span>
-      </div>
-      <div style="background:var(--bg);border:1px solid var(--accent);border-radius:8px;padding:14px;font-family:monospace;font-size:0.82rem;word-break:break-all;margin:16px 0;position:relative;">
-        <span id="apiKeyText"></span>
-        <button onclick="copyKey()" id="copyBtn" style="position:absolute;top:8px;right:8px;background:var(--accent);color:var(--bg);border:none;border-radius:4px;padding:4px 12px;cursor:pointer;font-size:0.8rem;">Copy</button>
-      </div>
-      <p style="margin-top:20px;color:var(--muted);font-size:0.9rem;">100 free PDFs/month • <a href="/docs">Read the docs →</a></p>
-    </div>
-  </div>
-</div>
-
-
 <!-- Recovery Modal -->
 <div class="modal-overlay" id="recoverModal" role="dialog" aria-label="Recover API key">
   <div class="modal">