 map
/// @param {Map} $map
/// @return {Number} max depth of `$map`
@function map-depth($map)
  $level: 1

  @each $key, $value in $map
    @if type-of($value) == 'map'
      $level: max(map-depth($value) + 1, $level)

  @return $level;
```
  </div>
</div>
