Add footer scroll functionality and update layout styles

src/routes/+layout.svelte

@@ -2,6 +2,9 @@
     import Footer from "$lib/components/Footer.svelte";
     import Navbar from "$lib/components/Navbar.svelte";
     import "../app.css";
+
+    // only show footer if scrolled to the bottom
+    
 </script>
 
 <Navbar />
@@ -10,10 +13,10 @@
   </section>
   <!-- <Footer /> -->
 
-  <style>
+  <!-- <style>
     section {
         margin-top: 2rem;
         margin-bottom: 5rem;
         /* gives the footer space! */
     }
-  </style>
+  </style> -->