@mixin button-background($background, $highlight) {
  background: $background;
  background-image:
    linear-gradient($highlight 50%, transparent 50%, transparent);
}

@mixin field-margin($margin) {
  margin: $margin 0;

  &:first-child {
    margin-top: 0;
  }

  &:last-child {
    margin-bottom: 0;
  }
}