I was looking for CSS-only **ProgressBar** that shows such activity with a nice looking using gradients and animations.

I investigated `<progress>` tag but it's [very limited in styling](https://css-tricks.com/html5-progress-element/), so I looked for other solutions but I was able to find only static examples, or in which [gradients are contracted within limits](https://css-tricks.com/html5-progress-element/) of lowest advance statuses, or in other case a complex markup with many nested `DIV`.

Desiderata should be:

* CSS-only solution
* Gradient background
* Gradient should not be collapsed if progressbar is less than 100% of its completition
* Animated status
* Minimal markup

Could be interesting if it could have also an *inderterminate* status.