Serve pre-rendered PDF as static file for instant download

- Render PDF once with WeasyPrint, save to static/Erika_Nielsen_CV.pdf
- Change download button from WeasyPrint route to direct static file link
- Faster download, no server-side rendering on each click

templates/index.html

@@ -384,6 +384,8 @@
       box-shadow: 0 4px 20px rgba(74, 143, 232, 0.5);
       transition: background 0.2s, transform 0.1s;
       z-index: 999;
+      text-decoration: none;
+      display: inline-block;
     }
     .pdf-btn:hover { background: #2f72d0; transform: scale(1.04); }
 
@@ -732,7 +734,7 @@
 </div>
 
 {% if not pdf_mode %}
-<button class="pdf-btn" onclick="window.location='/download'">⬇ Download CV som PDF</button>
+<a class="pdf-btn" href="/static/Erika_Nielsen_CV.pdf" download="Erika_Nielsen_CV.pdf">⬇ Download CV som PDF</a>
 {% endif %}
 
 </body>