/*
---
name: Z-index
category: Foundations/Variables
tag: variables
---
Instead of specifing custom Z-indexes for the different elements, these variables define five basic z-index values to position the layers of the interface.

```scss
$z-index: (
  'bottom': -1,
  'base': 0,
  'above': 10,
  'above-mean': 20,
  'top': 99
);
```
*/
$z-index: (
  'bottom': -1,
  'base': 0,
  'above': 10,
  'above-mean': 20,
  'top': 99
) !default;