bulma/sass/form/checkbox-radio.scss

%checkbox-radio {
  cursor: pointer;
  display: inline-block;
  line-height: 1.25;
  position: relative;

  input {
    cursor: pointer;
  }

  &:hover {
    color: $input-hover-color;
  }

  &[disabled],
  fieldset[disabled] &,
  input[disabled] {
    color: $input-disabled-color;
    cursor: not-allowed;
  }
}

.#{$class-prefix}checkbox {
  @extend %checkbox-radio;
}

.#{$class-prefix}radio {
  @extend %checkbox-radio;

  & + .#{$class-prefix}radio {
    @include ltr-property("margin", 0.5em, false);
  }
}