Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.5)
// Compass (v1.0.0.alpha.18)
// ----

$zindex: (
  header: 1000,
  modal: 2000,
  modal-buttons: 2500
);

@function z($label) {
  @return map-get($zindex,$label);
}

.header {
  z-index: z(header);
}
.modal {
  z-index: z(modal);
  &-buttons {
    z-index: z(modal-buttons);
  }
}

SassMeister-output.css

.header {
  z-index: 1000;
}

.modal {
  z-index: 2000;
}
.modal-buttons {
  z-index: 2500;
}