(CSS) Animations highlighting incorrectly

**CSS animations highlighting incorrectly**
When writing CSS animations, such as:
```CSS
@keyframes animation {
10.1% {
left: 10px;
}
}
```
It highlights incorrectly.
- `animation` isn't highlighted as a variable
- `10.1%` isn't highlighted as an `hljs-number` as it should be
- `.1` is highlighted as a `hljs-selector-class`.

**Language: CSS**

**I used `highlight`**

...

**Sample Code to Reproduce**
```CSS
@keyframes animation {
10.1% {
left: 10px;
}
}
```
Or any other CSS animation, really.
Example JSFiddle: https://jsfiddle.net/barhatsor/oz14ewyx/2/

**Expected behavior**
Turns out Github also higlights it incorrectly so here's a picture of CodeMirror getting it right:


Would be happy if this got fixed. Thanks!