Narrower width, hide contributing on small sizes, increase code sample size

_sass/color_schemes/opensearch.scss

@@ -1,4 +1,4 @@
-$content-width: 900px;
+$content-width: 740px;
 
 //
 // Brand colors

_sass/custom/custom.scss

@@ -54,7 +54,7 @@ body {
 
 code {
   @include monospace;
-  font-size: 0.75rem;
+  font-size: 0.8rem;
   -webkit-font-smoothing: subpixel-antialiased;
   -moz-osx-font-smoothing: auto;
 }
@@ -108,6 +108,13 @@ code {
   }
 }
 
+.site-footer {
+  display: none;
+  @include mq(lg) {
+    display: block;
+  }
+}
+
 .external-arrow {
   position: relative;
   top: 0.125rem;