// Z-index
// ––––––––––––––––––––––––––––––––––––––––––––––––––

@function zindex($layer) {
  // get z-index by name
  @if not map-has-key($z-layers, $layer) {
    @warn "No layer found for `#{$layer}` in $z-layers map. Property omitted.";
  }

  @return map-get($z-layers, $layer);
}