Make docs' content responsively wider (bigskysoftware#2644)

* Make docs' content responsively wider

* Keep navigation static

* Remove unneeded class

Author: pokonski

www/themes/htmx-theme/static/css/site.css

@@ -336,7 +336,37 @@ a[href]:hover, .btn:hover {
 }
 
 .c.wide-content {
-  max-width: 50em;
+  width: 100%
+}
+
+@media (min-width: 640px){
+  .c.wide-content {
+    max-width: 640px
+  }
+}
+
+@media (min-width: 768px){
+  .c.wide-content {
+    max-width: 768px
+  }
+}
+
+@media (min-width: 1024px){
+  .c.wide-content {
+    max-width: 1024px
+  }
+}
+
+@media (min-width: 1280px){
+  .c.wide-content {
+    max-width: 1280px
+  }
+}
+
+@media (min-width: 1536px){
+  .c.wide-content {
+    max-width: 1536px
+  }
 }
 
 .btn.primary {