Not found page

app/partials/not-found.jade

@@ -1 +1,5 @@
-h1 TODO error not found
+div.error-main
+    div.error-container
+        h1 Not found
+        p.error-text Error 404. The page you are looking for no longer exists. Perhaps you can return back to the homepage and see if you can find what you are looking for.
+        a(href="#", title="") Go back to login

app/styles/layout/not-found.scss

@@ -0,0 +1,24 @@
+.error-main {
+    @include table-flex(center, center, flex, row, wrap, center);
+    @extend %backgound-taiga;
+    bottom: 0;
+    left: 0;
+    position: fixed;
+    right: 0;
+    top: 0;
+    z-index: 999;
+    .error-container {
+        @include table-flex-child(0, 650px, 0, 650px);
+        color: $white;
+        text-align: center;
+    }
+    h1 {
+        color: $white;
+    }
+    a {
+        color: $green-taiga;
+        &:hover {
+            color: $fresh-taiga;
+        }
+    }
+}

app/styles/main.scss

@@ -119,6 +119,7 @@ $prefix-for-spec:      true;
 @import 'layout/base';
 @import 'layout/login';
 @import 'layout/invitation';
+@import 'layout/not-found';
 @import 'layout/backlog';
 @import 'layout/taskboard';
 @import 'layout/us-detail';