(Almost the) rest of the redesign (#880)

* Load demo img

* two-up styles

* Back button

* Button size tweak

* Move back btn

* Move options and back button into a single grid

* Simpler max height

* Responsive grid

* Feed index into options

* Option heading themes

* More option styles

* Changing checkbox position

* Theme range input & use transforms

* Range input underline theme

* Checkbox color

* Add toggle

* Reorder

* Arrow revealer

* Round two-up thumb

* Don't bundle CSS urls starting #

* Results in progress

* Fix Safari bugs

* Download blobs

* Loading spinner

* Hook up download button

* Different style for original image

* Mobile design for results

* Remove demo auto-loader

* Remove redundant colors

* Sticky headings

lib/css-plugin.js

@@ -90,7 +90,7 @@ export default function (resolveFileUrl) {
             }),
             postCSSUrl({
               url: ({ relativePath, url }) => {
-                if (/^(https?|data):/.test(url)) return url;
+                if (/^((https?|data):|#)/.test(url)) return url;
                 const parsedPath = parsePath(relativePath);
                 const source = readFileSync(
                   resolvePath(dirname(path), relativePath),