style: Titel auf 3rem, Logo auf 80px vergrößert

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

index.html

@@ -9,7 +9,7 @@
 <body>
   <header>
     <div style="display:flex;align-items:center;gap:0.6rem;margin-bottom:1.25rem">
-      <div id="lottie-logo" style="width:56px;height:56px;flex-shrink:0"></div>
+      <div id="lottie-logo" style="width:80px;height:80px;flex-shrink:0"></div>
       <h1 style="margin-bottom:0">Pigmento</h1>
     </div>
     <nav>