@mixin mask() {
  position: fixed;
  top: 0;
  bottom: 0; 
  left: 0;
  right: 0;
  background-color: rgba(55, 55, 55, 0.6);
  @include theme-background-color($__common-mask_background-color);
  height: 100%;
  // z-index: $zindex-modal;

  &-hidden {
    display: none;
  }
}