diff --git a/public/GitHub-Mark.svg b/public/GitHub-Mark.svg
new file mode 100644
index 0000000..4e057ba
--- /dev/null
+++ b/public/GitHub-Mark.svg
@@ -0,0 +1 @@
+<svg aria-hidden="true" focusable="false" data-prefix="fab" data-icon="github" class="svg-inline--fa fa-github" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 496 512"><path fill="currentColor" d="M165.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3 .3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6zm-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5 .3-6.2 2.3zm44.2-1.7c-2.9 .7-4.9 2.6-4.6 4.9 .3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9zM244.8 8C106.1 8 0 113.3 0 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C428.2 457.8 496 362.9 496 252 496 113.3 383.5 8 244.8 8zM97.2 352.9c-1.3 1-1 3.3 .7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1zm-10.8-8.1c-.7 1.3 .3 2.9 2.3 3.9 1.6 1 3.6 .7 4.3-.7 .7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3 .7zm32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3 .7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1zm-11.4-14.7c-1.6 1-1.6 3.6 0 5.9 1.6 2.3 4.3 3.3 5.6 2.3 1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2z"></path></svg>
\ No newline at end of file
diff --git a/src/App.svelte b/src/App.svelte
index 16b36f4..3b203e8 100644
--- a/src/App.svelte
+++ b/src/App.svelte
@@ -58,8 +58,8 @@
   }
 </script>
 
-<main>
-  <div class="container">
+<div class="container">
+  <main>
     <h5 style="grid-area: matrix-title">Matrix</h5>
     <h5 style="grid-area: kernel-title">Kernel</h5>
     <h5 style="grid-area: result-title">Result</h5>
@@ -92,32 +92,44 @@
         />
       </div>
     </div>
-  </div>
-</main>
+  </main>
+  <footer>
+    <a
+      href="https://github.com/mschuepbach/matrix-kernel-filter-calculator"
+      target="_blank"
+      title="GitHub Repository"
+    >
+      <img src="./GitHub-Mark.svg" alt="GitHub Repository" width="32px" />
+    </a>
+  </footer>
+</div>
 
 <style>
-  main {
-    text-align: center;
-    margin: 0 auto;
-  }
-
   h5 {
     margin: 1em 0 0;
   }
 
   .container {
+    text-align: center;
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+  }
+
+  main {
     display: grid;
+    margin-bottom: auto;
     grid-template-areas:
       "matrix-title kernel-title result-title"
       "matrix-size kernel-size result-size"
       "matrix kernel result"
       "padding padding padding";
-    grid-gap: 0.5em;
+    grid-gap: .8em;
     align-items: center;
   }
 
   @media (max-width: 960px) {
-    .container {
+    main {
       grid-template-areas:
         "matrix-title"
         "matrix-size"
@@ -131,4 +143,8 @@
         "padding";
     }
   }
+
+  footer {
+    margin-top: 1em;
+  }
 </style>