[frio] Fix minimal layout

view/theme/frio/css/style.css

@@ -130,6 +130,15 @@ blockquote {
 /*
 * standard page elements
 */
+
+section.minimal {
+    top: 0px;
+    left: 0px;
+    position: absolute;
+    width: 100%;
+    height: 100%;
+}
+
 #back-to-top {
     display: none;
     cursor: pointer;