Responsive on small screens

styles/01-styles.scss

@@ -191,6 +191,11 @@ input[type="submit"] {
     }
 }
 
+.overflow-x {
+    max-width: 100%;
+    overflow-x: auto;
+}
+
 .grid-2col {
     display: grid;
     grid-template-columns: auto 1fr;

styles/02-responsive.scss

@@ -0,0 +1,18 @@
+@media screen and (max-width:65rem) {
+
+    .sidebar {
+        width: 100%;
+        height: auto;
+        position: initial;
+        text-align: center;
+
+        .sidebar_search form {
+            width: 18em;
+            margin: auto;
+        }
+    }
+
+    .content {
+        margin-left: 0;
+    }
+}